Some standard content:
Engineering Construction Standard Full-text Information System
People's Republic of China Urban Construction Industry Standard CJ/T 93—1999
Eccentric signal butterfly valve for water-supply
Issued on September 6, 1999
Implementation on March 1, 2000
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
CJ/T93—1999
In the process of formulating this standard, reference was made to the international standard ISO10631:1994 "Metal Valves for General Purpose", the British national standard BS5155:1984 "Butterfly Valve" and the American UL1091 "Butterfly Valves for Fire Equipment". And it is consistent with the relevant contents of the national standard GB/T12238-1989 "General valve flange and wafer-connected butterfly valve". Appendix A of this standard is the appendix of the standard.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Water Supply and Drainage Product Standardization Technical Committee of the Ministry of Construction. This standard is drafted by Beijing Butterfly Valve Factory, the Architectural Design Institute of the Ministry of Construction, and the Tianjin Fire Science Research Institute of the Ministry of Public Security.
The main drafters of this standard are: Xiao Quansheng, Yang Zhenming, Shi Guiqin, He Ximing, Guan Huiliang. Engineering Construction Standard Full Text Information System
KANKAca
Engineering Construction Standard Full Text Information System
People's Republic of China Urban Construction Industry Standard Eccentric Signal Butterfly Valve for Water Supply
Eccentric slgnal butterfly valveforwater-supply1 Scope
CJ/T93—1999
This standard specifies the terminology, model, structural type, technical requirements, test methods, detection rules, marking and supply requirements of eccentric signal butterfly valves for water supply. This standard applies to eccentric signal butterfly valves with a nominal pressure PN not greater than 2.5MPa and a working medium of clean water in water supply systems (including fire water supply systems) that require an opening and closing status signal display.
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T1047—1995
Nominal diameter of pipeline components
GB/T1048—1990Nominal pressure of pipeline components3Enclosure protection level (IP code)
GB4208—1993
GB/T9113.1～9113.26-1988Integral steel pipe flangeGB/T1184-1996Shape and position tolerance
Tolerance value not specified
GB/T12220—1989General valve mark
GB/T1222 1—1989
Flange-connected metal valves
Structural length
GB/T12231—1989
Valve castings: Appearance quality requirements
Approved by the Ministry of Construction of the People's Republic of China on September 6, 1999
Implementation on March 1, 2000
Engineering construction standards full text information system
GB/T12238—1989
GB/T13927—1992
General valve Door
General valve
GB/T15188.2—1994
GB/T17241.6-1998
GB/T17241.7—1998
Flange and wafer connection butterfly valve
Pressure test
Valve structure length
Integral cast iron pipe flange
Wafer connection valve
Cast iron pipe flange
Technical conditions
JB308—1975 Valve model compilation method
JB /T5296—1991
JB/T7748—1995
JB/17928—1995
JB/T8527—1997
3 Terminology
Eccentric butterfly valve
Test method for flow coefficient and flow resistance coefficient of general valves Valve cleanliness and measurement method
Supply requirements for general valves
Metal sealing butterfly valve
eccentricbutterflyvalve
Butterfly valves other than center butterfly valves.
For the method of model compilation, see Appendix A (Appendix to the standard). 5 Structural type
5.1 The basic structural type and main component names of the eccentric signal butterfly valve are shown in Figures 1 and 2.
Engineering Construction Standard Full-text Information System
TTKAONTKAca-
Engineering Construction Standard Full-text Information System
Seal Room
Secrecy Bacteria
Engineering Construction Standard Full-text Information System
Wafer-connected Butterfly Valve
Flange-connected Butterfly Valve
Special Pipe
Engineering Construction Standard Full-text Information System
: The types of sealing pairs of eccentric signal butterfly valves are generally as follows: 5.2
a) metal and metal elastic seal,
b) metal and metal composite non-metallic seal: c) metal and non-metallic seal;
d) metal and metal rigid seal;
e) non-metal and non-metallic seal.
Technical requirements
6.1 Valve body
6.1.1 Structural length
a) The structural length of the flange-connected signal butterfly valve shall comply with the provisions of GB/T12221; b) The structural length of the wafer-connected signal butterfly valve shall comply with the provisions of GB/T15188.2.
Flange connection dimensions and flange sealing types
a) The gray cast iron flange connection dimensions and flange sealing surface types shall comply with the provisions of GB/T17241.6 and GB/T17241.7, b) The steel flange connection dimensions and flange sealing surface types shall comply with the provisions of GB/T9113.1~9113.26.
6.1.3 The sealing surfaces at both ends of the double flange and wafer-connected flange shall be parallel to each other and perpendicular to the butterfly valve channel. The parallelism and verticality tolerances shall comply with the 12-level accuracy of Table B3 in GB/T1184-1996.
6.1.4 The position tolerance of the axis of the bolt holes of the flanges at both ends relative to the axis of the valve body (flange) shall comply with the provisions of Table 1.
6.1.5 The bolt holes of the flanges at both ends are generally through holes. When there are obstacles due to the journal or rib plate, blind holes with threads can also be used.
Engineering Construction Standard Full Text Information System
TKAoNTKAca-
Engineering Construction Standard Full Text Information System
Flange Bolt Hole Diameter
11.0~17.5
22.0~30.0
33.0~48.0
52.0~62.0
Valve Seat (Seal Ring)
Position Tolerance@
The minimum diameter of the valve seat shall comply with the provisions of GB/T12238. 6.3 Butterfly plate and valve stem
The connection strength between the butterfly plate and the valve stem should be able to withstand the maximum torque transmitted by the valve stem. The connection can be pinned or keyed. Regardless of the form of connection, the connection must be guaranteed not to loosen under normal working conditions. 6.3.2 The valve stem can be designed as an integral shaft or as two separate short shafts. The length of the embedded shaft hole should not be less than 1.5 times the shaft diameter. 6.4 Bearings and stuffing boxes should comply with the provisions of GB/T12238. 6.5 Operation should comply with the provisions of GB/T12238. 6.6 Materials
The materials of eccentric butterfly valves should comply with the provisions of GB/T12238, and other materials with performance not lower than that listed in GB/T12238 are allowed. 6.7 The eccentric butterfly valve should provide the flow coefficient C value and flow resistance coefficient K value and flow characteristic curve when fully open.
6.8 Performance
6.8.1 When used in fire protection situations, the shell test and sealing test shall meet the following requirements: a) The shell test shall be able to withstand the internal hydrostatic pressure of four times the nominal pressure, maintain for 1 minute, without external leakage, and the shell (including the stuffing box and the connection between the valve body and the valve cover) shall not have structural damage.
b) The inlet of the sealing test shall be able to withstand the hydrostatic pressure of twice the nominal pressure, maintain for 1 minute without visible leakage.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
6.8.2 For signal butterfly valves used in non-firefighting situations, the shell test and sealing test shall comply with the provisions of GB/T13927.
6.8.3 The display method of the opening and closing status of the signal butterfly valve shall meet the following requirements at the same time: a) Send the signal through the junction box. Within the full range of valve opening and closing stroke, according to the valve from opening to closing, the angular stroke shall not exceed 15°, and the opening signal shall be output. When the angular stroke exceeds 15° until the closing range, the closing signal shall be output; b) In order to meet the actual needs of different occasions (non-firefighting occasions), it is allowed to adjust the display position of the opening and closing status according to user requirements, but the supply and demand parties shall make clear written provisions.
6.8.4 Signal device
a) The signal device shall be tested for overload capacity in accordance with 7.4.1, and its signal components shall not be overheated, burnt, pitted, or have contact adhesion. b) The signal device shall be tested for withstand voltage in accordance with 7.4.2, and all its moving parts and stationary parts (including the housing) shall not be broken down. The signal device shall be tested for insulation resistance in accordance with 7.4.3, and when the contact is disconnected, the insulation resistance between the same-level incoming and outgoing lines shall be greater than 2MQ. d) The signal device shall be tested for contact resistance in accordance with 7.4.4, and the contact resistance between each pair of closed contacts of the switch shall be less than 0.012: e) The signal device shall be sealed, dustproof, and moisture-proof. The protection level shall comply with the provisions of IP54 in GB4208.
6.8.5 The appearance quality of eccentric butterfly valve castings shall comply with the provisions of GB/T12231. 6.8.6 The maximum allowable value of the cleanliness of eccentric butterfly valves shall comply with the provisions of JB/T7748. 7 Test methods
7.1 Shell test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of a) in 6.8.1 and 6.8.2.
7.2 Sealing test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of b) in 6.8.1 and 6.8.2.
7.3 The opening and closing display shall be judged by the signal of the signal lamp and the size of the angular stroke, and the result shall comply with the provisions of a) in 6.8.3.
7.4 Inspection of signal device
7.4.1 Overload capacity test
a) The signal butterfly valve is subjected to an action test of 500 cycles at a frequency of six opening and closing actions per minute. The test voltage applied to the contacts is the rated voltage of the contacts, and the test current is 150% of the rated current;
b When the signal butterfly valve used in the AC control circuit is subjected to this test, an inductive load shall be used and the power factor shall be 0.6. The test result shall comply with the requirements of a) in 6.8.4.
7.4.2 Withstand voltage test
a) The test power supply of this test adopts a 50H sinusoidal AC power supply. When the rated voltage is less than or equal to 50V, the voltage is 500V; when the rated voltage is greater than 50V, the voltage is 1500V;
b) The test voltage is increased from zero to 500V at a rising speed of 100V/s and maintained for 60s±5s, and the test piece is inspected. The result should comply with the requirements of b) in 6.8.4. 7.4.3 Insulation resistance test
a) Apply 500V±50V between the parts specified in c) of 6.8.4, and measure the insulation resistance value after 60s±5s;
b) The test device for measuring insulation resistance should meet the following technical requirements: Test voltage: 500V±50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s±5s
The measurement result should meet the requirements of c) of 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error of no more than ±5% to test, and test five times. Take the average value of the five tests as the result, and it should meet the requirements of d) of 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The cleanliness of the eccentric signal butterfly valve shall be determined in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product shall be inspected one by one.
8.1.2 The factory inspection items and technical requirements shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) Trial production appraisal of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance;
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term suspension of production; e) When the national quality supervision agency proposes a type inspection requirement; f) When the factory inspection results are significantly different from the last type inspection. 8.2.2
The items and technical requirements of type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric3. The display method of the opening and closing status of the signal butterfly valve should meet the following requirements at the same time: a) The signal is sent through the junction box. Within the full range of the valve opening and closing stroke, the valve should be output as an open signal when the angular stroke does not exceed 15° from opening to closing. When the angular stroke exceeds 15° until the closing range, it should be output as a closed signal; b) In order to meet the actual needs of different occasions (non-firefighting occasions), the display position of the opening and closing status is allowed to be adjusted according to user requirements, but the supply and demand parties should make clear written provisions.
6.8.4 Signal device
a) The signal device shall be tested for overload capacity in accordance with 7.4.1, and its signal components shall not be overheated, burnt, pitted, or have contact adhesion. b) The signal device shall be tested for withstand voltage in accordance with 7.4.2, and all its moving parts and stationary parts (including the housing) shall not be broken down. The signal device shall be tested for insulation resistance in accordance with 7.4.3, and when the contact is disconnected, the insulation resistance between the same-level incoming and outgoing lines shall be greater than 2MQ. d) The signal device shall be tested for contact resistance in accordance with 7.4.4, and the contact resistance between each pair of closed contacts of the switch shall be less than 0.012: e) The signal device shall be sealed, dustproof, and moisture-proof. The protection level shall comply with the provisions of IP54 in GB4208.
6.8.5 The appearance quality of eccentric butterfly valve castings shall comply with the provisions of GB/T12231. 6.8.6 The maximum allowable value of the cleanliness of eccentric butterfly valves shall comply with the provisions of JB/T7748. 7 Test methods
7.1 Shell test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of a) in 6.8.1 and 6.8.2.
7.2 Sealing test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of b) in 6.8.1 and 6.8.2.
7.3 The opening and closing display shall be judged by the signal of the signal lamp and the size of the angular stroke, and the result shall comply with the provisions of a) in 6.8.3.
7.4 Inspection of signal device
7.4.1 Overload capacity test
a) The signal butterfly valve is subjected to an action test of 500 cycles at a frequency of six opening and closing actions per minute. The test voltage applied to the contacts is the rated voltage of the contacts, and the test current is 150% of the rated current;
b When the signal butterfly valve used in the AC control circuit is subjected to this test, an inductive load shall be used and the power factor shall be 0.6. The test result shall comply with the requirements of a) in 6.8.4.
7.4.2 Withstand voltage test
a) The test power supply of this test adopts a 50H sinusoidal AC power supply. When the rated voltage is less than or equal to 50V, the voltage is 500V; when the rated voltage is greater than 50V, the voltage is 1500V;
b) The test voltage is increased from zero to 500V at a rising speed of 100V/s and maintained for 60s±5s, and the test piece is inspected. The result should comply with the requirements of b) in 6.8.4. 7.4.3 Insulation resistance test
a) Apply 500V±50V between the parts specified in c) of 6.8.4, and measure the insulation resistance value after 60s±5s;
b) The test device for measuring insulation resistance should meet the following technical requirements: Test voltage: 500V±50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s±5s
The measurement result should meet the requirements of c) of 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error of no more than ±5% to test, and test five times. Take the average value of the five tests as the result, and it should meet the requirements of d) of 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The cleanliness of the eccentric signal butterfly valve shall be determined in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product shall be inspected one by one.
8.1.2 The factory inspection items and technical requirements shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) Trial production appraisal of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance;
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term suspension of production; e) When the national quality supervision agency proposes a type inspection requirement; f) When the factory inspection results are significantly different from the last type inspection. 8.2.2
The items and technical requirements of type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric3. The display method of the opening and closing status of the signal butterfly valve should meet the following requirements at the same time: a) The signal is sent through the junction box. Within the full range of the valve opening and closing stroke, the valve should be output as an open signal when the angular stroke does not exceed 15° from opening to closing. When the angular stroke exceeds 15° until the closing range, it should be output as a closed signal; b) In order to meet the actual needs of different occasions (non-firefighting occasions), the display position of the opening and closing status is allowed to be adjusted according to user requirements, but the supply and demand parties should make clear written provisions.
6.8.4 Signal device
a) The signal device shall be tested for overload capacity in accordance with 7.4.1, and its signal components shall not be overheated, burnt, pitted, or have contact adhesion. b) The signal device shall be tested for withstand voltage in accordance with 7.4.2, and all its moving parts and stationary parts (including the housing) shall not be broken down. The signal device shall be tested for insulation resistance in accordance with 7.4.3, and when the contact is disconnected, the insulation resistance between the same-level incoming and outgoing lines shall be greater than 2MQ. d) The signal device shall be tested for contact resistance in accordance with 7.4.4, and the contact resistance between each pair of closed contacts of the switch shall be less than 0.012: e) The signal device shall be sealed, dustproof, and moisture-proof. The protection level shall comply with the provisions of IP54 in GB4208.
6.8.5 The appearance quality of eccentric butterfly valve castings shall comply with the provisions of GB/T12231. 6.8.6 The maximum allowable value of the cleanliness of eccentric butterfly valves shall comply with the provisions of JB/T7748. 7 Test methods
7.1 Shell test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of a) in 6.8.1 and 6.8.2.
7.2 Sealing test shall be carried out in accordance with the method of GB/T13927 and shall comply with the provisions of b) in 6.8.1 and 6.8.2.
7.3 The opening and closing display shall be judged by the signal of the signal lamp and the size of the angular stroke, and the result shall comply with the provisions of a) in 6.8.3.
7.4 Inspection of signal device
7.4.1 Overload capacity test
a) The signal butterfly valve is subjected to an action test of 500 cycles at a frequency of six opening and closing actions per minute. The test voltage applied to the contacts is the rated voltage of the contacts, and the test current is 150% of the rated current;
b When the signal butterfly valve used in the AC control circuit is subjected to this test, an inductive load shall be used and the power factor shall be 0.6. The test result shall comply with the requirements of a) in 6.8.4.
7.4.2 Withstand voltage test
a) The test power supply of this test adopts a 50H sinusoidal AC power supply. When the rated voltage is less than or equal to 50V, the voltage is 500V; when the rated voltage is greater than 50V, the voltage is 1500V;
b) The test voltage is increased from zero to 500V at a rising speed of 100V/s and maintained for 60s±5s, and the test piece is inspected. The result should comply with the requirements of b) in 6.8.4. 7.4.3 Insulation resistance test
a) Apply 500V±50V between the parts specified in c) of 6.8.4, and measure the insulation resistance value after 60s±5s;
b) The test device for measuring insulation resistance should meet the following technical requirements: Test voltage: 500V±50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s±5s
The measurement result should meet the requirements of c) of 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error of no more than ±5% to test, and test five times. Take the average value of the five tests as the result, and it should meet the requirements of d) of 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The cleanliness of the eccentric signal butterfly valve shall be determined in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product shall be inspected one by one.
8.1.2 The factory inspection items and technical requirements shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) Trial production appraisal of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance;
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term suspension of production; e) When the national quality supervision agency proposes a type inspection requirement; f) When the factory inspection results are significantly different from the last type inspection. 8.2.2
The items and technical requirements of type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric5 The appearance quality of eccentric butterfly valve castings shall comply with the provisions of GB/T12231. 6.8.6 The maximum allowable value of the cleanliness of eccentric butterfly valves shall comply with the provisions of JB/T7748. 7 Test methods
7.1 The shell test shall comply with the methods of GB/T13927 and shall comply with the provisions of 6.8.1 a) and 6.8.2.
7.2 The sealing test shall comply with the methods of GB/T13927 and shall comply with the provisions of 6.8.1 b) and 6.8.2.
7.3 The opening and closing display shall be judged by the signal of the signal lamp and the size of the angular stroke, and the result6
Engineering Construction Standard Full-text Information System
kAoNiTKAca-
Engineering Construction Standard Full-text Information System
should comply with the provisions of 6.8.3 a).
7.4 Inspection of signal device
7.4.1 Overload capacity test
a) The signal butterfly valve is subjected to an action test of 500 cycles at a frequency of six opening and closing actions per minute. The test voltage applied to the contacts is the rated voltage of the contacts, and the test current is 150% of the rated current;
b When the signal butterfly valve used in the AC control circuit is subjected to this test, an inductive load shall be used and the power factor shall be 0.6. The test result shall comply with the requirements of a) in 6.8.4.
7.4.2 Withstand voltage test
a) The test power supply of this test adopts a 50H sinusoidal AC power supply. When the rated voltage is less than or equal to 50V, the voltage is 500V; when the rated voltage is greater than 50V, the voltage is 1500V;
b) The test voltage is increased from zero to 500V at a rising speed of 100V/s and maintained for 60s±5s, and the test piece is inspected. The result should comply with the requirements of b) in 6.8.4. 7.4.3 Insulation resistance test
a) Apply 500V±50V between the parts specified in c) of 6.8.4, and measure the insulation resistance value after 60s±5s;
b) The test device for measuring insulation resistance should meet the following technical requirements: Test voltage: 500V±50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s±5s
The measurement result should meet the requirements of c) of 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error of no more than ±5% to test, and test five times. Take the average value of the five tests as the result, and it should meet the requirements of d) of 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The cleanliness of the eccentric signal butterfly valve shall be determined in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product shall be inspected one by one.
8.1.2 The factory inspection items and technical requirements shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) Trial production appraisal of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance;
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term suspension of production; e) When the national quality supervision agency proposes a type inspection requirement; f) When the factory inspection results are significantly different from the last type inspection. 8.2.2
The items and technical requirements of type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric5 The appearance quality of eccentric butterfly valve castings shall comply with the provisions of GB/T12231. 6.8.6 The maximum allowable value of the cleanliness of eccentric butterfly valves shall comply with the provisions of JB/T7748. 7 Test methods
7.1 The shell test shall comply with the methods of GB/T13927 and shall comply with the provisions of 6.8.1 a) and 6.8.2.
7.2 The sealing test shall comply with the methods of GB/T13927 and shall comply with the provisions of 6.8.1 b) and 6.8.2.
7.3 The opening and closing display shall be judged by the signal of the signal lamp and the size of the angular stroke, and the result6
Engineering Construction Standard Full-text Information System
kAoNiTKAca-
Engineering Construction Standard Full-text Information System
should comply with the provisions of 6.8.3 a).
7.4 Inspection of signal device
7.4.1 Overload capacity test
a) The signal butterfly valve is subjected to an action test of 500 cycles at a frequency of six opening and closing actions per minute. The test voltage applied to the contacts is the rated voltage of the contacts, and the test current is 150% of the rated current;
b When the signal butterfly valve used in the AC control circuit is subjected to this test, an inductive load shall be used and the power factor shall be 0.6. The test result shall comply with the requirements of a) in 6.8.4.
7.4.2 Withstand voltage test
a) The test power supply of this test adopts a 50H sinusoidal AC power supply. When the rated voltage is less than or equal to 50V, the voltage is 500V; when the rated voltage is greater than 50V, the voltage is 1500V;
b) The test voltage is increased from zero to 500V at a rising speed of 100V/s and maintained for 60s±5s, and the test piece is inspected. The result should comply with the requirements of b) in 6.8.4. 7.4.3 Insulation resistance test
a) Apply 500V±50V between the parts specified in c) of 6.8.4, and measure the insulation resistance value after 60s±5s;
b) The test device for measuring insulation resistance should meet the following technical requirements: Test voltage: 500V±50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s±5s
The measurement result should meet the requirements of c) of 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error of no more than ±5% to test, and test five times. Take the average value of the five tests as the result, and it should meet the requirements of d) of 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The cleanliness of the eccentric signal butterfly valve shall be determined in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product shall be inspected one by one.
8.1.2 The factory inspection items and technical requirements shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) Trial production appraisal of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance;
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term suspension of production; e) When the national quality supervision agency proposes a type inspection requirement; f) When the factory inspection results are significantly different from the last type inspection. 8.2.2
The items and technical requirements of type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric4 c) apply 500V ± 50V between the parts specified in the test, and measure the insulation resistance value after 60s ± 5s;
b) The test device for measuring insulation resistance shall meet the following technical requirements: Test voltage: 500V ± 50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s ± 5s
The measurement result shall meet the requirements of c) in 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error not exceeding ± 5% to test, the number of tests is five, and the average value of the five tests is taken as the result, and it shall meet the requirements of d) in 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The determination of cleanliness of eccentric signal butterfly valve shall be carried out in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product leaving the factory shall be inspected.
8.1.2 The items and technical requirements for factory inspection shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) trial production appraisal of new products or old products transferred to the factory for production; b) after formal production, if there are major changes in structure, materials, and processes that may affect product performance;
c) regular and quantitative periodic assessments during formal production; d) when the product is resumed after long-term suspension of production; e) when the national quality supervision agency proposes a requirement for type inspection; f) when there is a significant difference between the factory inspection results and the last type inspection results. 8.2.2
The items and technical requirements for type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric4 c) apply 500V ± 50V between the parts specified in the test, and measure the insulation resistance value after 60s ± 5s;
b) The test device for measuring insulation resistance shall meet the following technical requirements: Test voltage: 500V ± 50V (ground terminal is metal plate) Measurement range: 0~500MQ
Minimum division: 0.1MQ
Time: 60s ± 5s
The measurement result shall meet the requirements of c) in 6.8.4. 7.4.4 Contact resistance test
Use a resistance measuring instrument with an error not exceeding ± 5% to test, the number of tests is five, and the average value of the five tests is taken as the result, and it shall meet the requirements of d) in 6.8.4. 7.5 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.6 The determination of cleanliness of eccentric signal butterfly valve shall be carried out in accordance with the provisions of JB/T7748. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
8 Inspection Rules
8.1 Factory Inspection
8.1.1 Each product leaving the factory shall be inspected.
8.1.2 The items and technical requirements for factory inspection shall comply with the provisions of Table 2. 8.2 Type Inspection
8.2.1 Type inspection shall generally be carried out in any of the following situations: a) trial production appraisal of new products or old products transferred to the factory for production; b) after formal production, if there are major changes in structure, materials, and processes that may affect product performance;
c) regular and quantitative periodic assessments during formal production; d) when the product is resumed after long-term suspension of production; e) when the national quality supervision agency proposes a requirement for type inspection; f) when there is a significant difference between the factory inspection results and the last type inspection results. 8.2.2
The items and technical requirements for type inspection shall comply with the provisions of Table 2. The sampling of type inspection shall comply with the provisions of JB/T8527. Table 2
Inspection items
Appearance inspection
Shell test
Seal test
Signal display test
Overload capacity
Withstand voltage capacity
Insulation resistance test
Contact resistance test
Flow and flow resistance coefficient test
Cleanliness determination
Determination of inspection results
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of 6.8.5||t t||Should comply with the provisions of 7.1
Should comply with the provisions of 7.2
Should comply with the provisions of 7.3
Should comply with the provisions of 7.4.1
Should comply with the provisions of 7.4.2
Should comply with the provisions of 7.4.3
Should comply with the provisions of 7.4.4
Should comply with the provisions of 7.5
Should comply with the provisions of 7.6
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product shall be judged as an unqualified product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the requirements of the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the requirements of the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test and signal display test of each signal butterfly valve must all meet the requirements of the technical requirements in Table 2. For other type inspection items, if one of the indicators of the inspected signal butterfly valves is lower than the requirements of the technical requirements in Table 2, it is allowed to extract the specified number of signal butterfly valves from the sampling. During the re-inspection, all inspection items must meet the requirements of the technical requirements in Table 2, otherwise they will be judged as unqualified products.
The marking of the eccentric signal butterfly valve shall comply with the provisions of GB/T12220, and the supply of the eccentric signal butterfly valve shall comply with the provisions of JB/T7928. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Eccentric Signal Butterfly Valve Model
1Eccentric Signal Butterfly Valve Model consists of the following eight units, compiled in the following order: Al
National Material Code
Nominal Pressure Value MPa×10)
Seal Auxiliary Material Code
Structural Code
Connection Code
Transmission Code
Valve Category Code
Nominal Diameter Value
1Eccentric Signal Butterfly Valve Category Code is expressed in Chinese Pinyin letters, see Table A1. Al.1
Signal Butterfly Valve
Transmission mode should comply with B308 regulations.
Connection form should comply with JB308 regulations.
Fire signal butterfly valve
Structural type codes are expressed in Arabic numerals, see Table A2. Table A2www.bzxz.net
Structural type
Single eccentric
Engineering construction standard full text information system
Double eccentric
KAONTKAca=
Multiple eccentric
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