This standard was formulated with reference to the international standard ISO 10631:1994 "Metal Valves for General Purpose" and the British national standard BS 5155:1984 "Butterfly Valves". It is consistent with the relevant contents of the national standard GB/T 12238-1989 "General Valves Flange and Wafer Connection Butterfly Valves". This standard specifies the terminology, model, structural type, technical requirements, test methods, inspection rules, marking and supply requirements of eccentric butterfly valves for heating. CJ/T 92-1999 Eccentric Butterfly Valve for Heating CJ/T92-1999 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full Text Information System
People's Republic of China Urban Construction Industry Standard CJ/T 92-1999
Eccentric butterfly valve for heat-supply Construction Standard
1999-09-06 Issued
2000-03-01 Implementation
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/T92-1999
In the process of formulating this standard, the international standard ISO10631:1994 "Metal Valves for General Purposes" and the British national standard BS5155:1984 "Butterfly Valve" were referred to. And it is consistent with the relevant contents of the national standard GB/T12238-1989 "General Valve Flange and Wafer Connection Butterfly Valve".
Appendix A of this standard is the standard appendix.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Urban Construction Research Institute of the Ministry of Construction, the technical unit responsible for urban construction standards of the Ministry of Construction.
This standard is drafted by Beijing Butterfly Valve Factory and the Architectural Design Institute of the Ministry of Construction. The main drafters of this standard are Xiao Quansheng, He Ximing, Shi Guiqin, Zhao Yusheng, and Guan Huiliang. Engineering Construction Standard Full-text Information System
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Urban Construction Industry Standard of the People's Republic of China Eccentric Butterfly Valve for Heat-supply
Eccentric butterfly valve for heat-supply1 Scope
CJ/T92-—1999
This standard specifies the terminology, model, structural type, technical requirements, test methods, inspection rules, marking and supply requirements of eccentric butterfly valves for heat-supply. This standard applies to flange and wafer-connected eccentric butterfly valves with nominal pressure PM1.0～2.5MPa, nominal diameter DN50～1200mm, medium temperature not more than 350℃, and medium hot water and steam.
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 versions of the following standards. GB/T1047—1995 Nominal diameter of pipeline components GB/T1048—1990
Nominal pressure of pipeline components
GB/T1184—1996
Shape and position tolerances without tolerance values
GB/T9113.1~9113.26—1988 Integral steel pipe flanges GB/T9131-1988 Steel pipe flanges Pressure and temperature grades General valve marks
GB/T12220-1989
GB/T12221 -1989 Structural length of flange-connected metal valves Approved by the Ministry of Construction of the People's Republic of China on September 6, 1999 Full text information system of engineering construction standards
Implementation on March 1, 2000
Full text information system of engineering construction standards
GB/T12231-1989
GB/T12238—1989
GB/T13927—1992
Appearance quality requirements of valve steel castings
Flange and wafer-connected butterfly valves
General valve Door
General valve
Pressure test
GB/T15188.2-1994
GB/T17241.6—1998
GB/T17241.7—1998
JB308—1975
JB/T5296—1991
JB/T7748—1995
JB/T7928—1995
JB/T8527—1997
3 Techniques
Structural length of valve
Wafer-connected valve
Integral cast iron pipe flange
Technical conditions for cast iron pipe flange
Model compilation method
Test method for flow coefficient and flow resistance coefficient of general valve
Valve cleanliness and measurement method
Supply requirements for general valve
Metal sealed butterfly valve
Eccentric butterfly valve
eccentricbutterflyvalve
Butterfly valves other than center butterfly valves.
4 Model
For the model compilation method, see Appendix A (Standard Appendix). Structural type
5.1 The basic structural type and main component names of eccentric butterfly valves are shown in Figures 1 and 2.
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Engineering Construction Standard Full Text Information System
Seal Diagram
Figure 1 Wafer Connection Butterfly Valve
Figure 2 Flange Connection Butterfly Valve
The types of sealing pairs of eccentric butterfly valves are generally as follows: 5.2
a) Metal and metal elastic seal,
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
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 Pressure and Temperature Rating
The pressure-temperature rating of the eccentric butterfly valve is determined by the pressure-temperature rating of the valve body material. The materials of the butterfly plate, sealing pair and other internal parts shall meet the requirements of the working conditions of the valve. 6.1.1 The pressure-temperature grade of the steel valve body shall comply with the provisions of GB/T9131. 6.1.2 The pressure-temperature grade of the gray cast iron valve body shall comply with the provisions of Appendix A Table A1 of GB/T17241.7-1998.
6.1.3 The pressure-temperature grade of the ductile iron valve body shall comply with the provisions of Appendix A Table A2 of GB/T17241.7-1998.
6.2 Valve body
6.2.1 Flange connection dimensions and flange sealing surface type a) The cast iron flange connection dimensions and flange sealing surface type shall comply with the provisions of GB/T17241.6.
b) The steel flange connection dimensions and flange sealing surface type shall comply with the provisions of GB/T9113.1~9113.26.
6.2.2 Structural length
a) The structural length of the double flange connection butterfly valve shall comply with the provisions of GB/T12221. b) The structural length of the wafer connection butterfly valve shall comply with the provisions of GB/T15188.2. 6.2.3 The sealing surfaces of the flanges at both ends of the valve body are parallel to each other and perpendicular to the axis of the butterfly plate channel. The parallelism and perpendicularity tolerances shall comply with the 12-level accuracy requirements of Table B3 in GB/T1184-1986.
6.2.4 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.
6.2.5 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) is less than the requirements of Table 1.
The minimum wall thickness of the valve body shall be calculated in accordance with the provisions of GB/T12238. Table 1
Flange screw 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 be in accordance with the provisions of GB/T12238. 6.4
Butterfly plate and valve stem
6.4.1The connection strength between the butterfly plate and the valve stem shall be able to withstand the maximum torque transmitted by the valve stem. The connection can be pinned or keyed. Regardless of the type of connection, the connection must be guaranteed not to loosen under normal working conditions. 6.4.2 The valve stem can be designed as an integral shaft or as two separate short shafts, and the length of the shaft embedded in the shaft hole should not be less than 1.5 times the shaft diameter. 6.5 The bearings and stuffing boxes should comply with the provisions of GB/T12238. 6.6 The operation of the eccentric butterfly valve should comply with the provisions of GB/T12238.7 The materials of eccentric butterfly valves shall comply with the provisions of GB/T12238, but the sealing rings of non-metallic sealing products shall use polytetrafluoroethylene and polystyrene materials, the composite layer sealing materials shall use materials such as stainless steel composite graphite, and the fillers shall use polytetrafluoroethylene and flexible graphite materials. Other materials with performance not lower than that listed in GB/T12238 are allowed to be selected. 6.8 Flow characteristics
The eccentric butterfly valve shall give the flow coefficient C value and flow resistance coefficient K value and flow characteristic curve when fully open.
6.9 Performance
6.9.1 The appearance quality of the eccentric butterfly valve casting shall comply with the provisions of GB/T12231. 6.9.2 The shell test shall be able to withstand an internal hydrostatic pressure of 1.5 times the nominal pressure, maintain no external leakage for 5
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
1min, and the shell (including the stuffing box and the connection between the valve body and the valve cover) shall not have structural damage.
6.9.3 Sealing test The inlet shall be able to withstand a hydrostatic pressure of 1.1 times the nominal pressure and maintain no visible leakage for 1 minute.
6.9.4 The maximum allowable value of the cleanliness of the eccentric butterfly valve shall comply with the provisions of JB/T7748. 7
Test method
The shell test shall be carried out in accordance with the provisions of GB/T13927. 7.2
The sealing test shall be carried out in accordance with the provisions of GB/T13927. 7.3 The test of flow coefficient and flow resistance coefficient shall be carried out in accordance with the provisions of JB/T5296. 7.4
The cleanliness determination shall be carried out in accordance with the provisions of JB/T7748. 8
Inspection rules
Factory inspection
Factory butterfly valves shall be inspected one by one.
Factory inspection items and technical requirements shall comply with the provisions of Table 2. Table 2
Inspection items
Appearance quality inspection
Shell test
Seal test
Shell material
Flow rate and flow resistance coefficient test
Cleanliness determinationbzxZ.net
Type inspection
Inspection classification
Factory inspection
Type inspection
Technical requirements
Should comply with the provisions of GB/T12231
Should comply with the provisions of GB/T13927
Should comply with the provisions of GB/T13927
Should comply with the provisions of GB/T12238
Should comply with the provisions of JB/T5296
Should In accordance with the provisions of JB/T7748
8.2.1 In any of the following cases, type inspection should generally be carried out: a) Trial production and identification of new products or old products transferred to factory production; 6
Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance,
c) Regular and quantitative periodic assessment during formal production; d) When the product is resumed after long-term shutdown; e) When the factory inspection results are significantly different from the last type inspection; f When the national quality supervision agency proposes a type inspection requirement. 8.2.2 Type inspection items shall comply with the provisions of Table 2. 8.2.3 Type inspection sampling shall comply with the provisions of JB/T8527. 8.3 Determination of inspection results
8.3.1 If one of the items in Table 2 of the factory inspection items is unqualified, the product is judged as a defective product.
8.3.2 The technical requirements for type inspection are shown in Table 2. The shell test, sealing test, and shell material test of each butterfly valve under inspection must all meet the requirements of the technical requirements in Table 2. For other inspection items, if one of the indicators of one of the butterfly valves under inspection is lower than the requirements of the technical requirements in Table 2, it is allowed to extract a specified number of butterfly valves from the sampling. During the re-inspection, all inspection items must meet the requirements of the technical requirements in Table 2, otherwise it will be judged as a defective product.
9 Marking
The marking of eccentric butterfly valves shall comply with the provisions of GB/T12220. 10 Supply
The supply of eccentric butterfly valve products shall comply with the provisions of JB/T7928. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Butterfly Valve Model Compilation Method
1 Butterfly valve model consists of the following eight units, compiled in the following order: Al
口口口
Valve Body Material Code
Nominal Pressure Value
(MPa×10))
Seal Fucai Code
Structural Form Code
-Connection Form Code
Transmission Mode Code
Butterfly Category Code
Nominal Diameter Value
Butterfly valve category codes are expressed in Chinese phonetic letters, see Table A1. Table A1
Signal Butterfly Valve
The transmission mode should comply with the provisions of JB308.
The connection form shall comply with the provisions of JB308.
The structural form code is expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering Construction Standard Full Text Information System
Double eccentric
Check butterfly valve
Multiple eccentric
TTKAONTKAca-
Engineering Construction Standard Full Text Information System
The valve seat sealing material code is expressed in Chinese phonetic letters, see Table A3. Al.5
Valve seat sealing
Surface material
Alloy steel composite
Asbestos rubber
Alloy steel composite
Graphite
Alloy steel
Note: The material code of the valve seat sealing surface directly processed by the valve body is represented by \W. When the valve seat and butterfly plate sealing surface materials are different, the low hardness material code is used. The rest should comply with the provisions of JB308. The nominal diameter value should comply with the provisions of GB/T1047. Al.6
The nominal pressure value should comply with the provisions of GB/T1048. The valve body material code should comply with the provisions of JB308. Al.8
Model Example
a)D73H-16C
Meaning: butterfly valve, handle drive, wafer connection, double eccentric structure, alloy steel sealing surface, nominal pressure 1.6MPa, valve body material is carbon steel. b)D373X-10
Meaning: butterfly valve, worm gear drive, wafer connection, double eccentric structure, rubber sealing surface, nominal pressure 1.OMPa, valve body material is gray cast iron. 9
Engineering Construction Standard Full Text Information System1 Type inspection should generally be carried out in any of the following situations: a) Trial type identification of new products or old products for transfer to factory 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 assessment during formal production; d) When the product is resumed after long-term shutdown; e) When there is a significant difference between the factory inspection results and the last type inspection; f When the national quality supervision agency proposes a type inspection requirement. 8.2.2 Type inspection items shall comply with the provisions of Table 2. 8.2.3 Type inspection sampling shall comply with the provisions of JB/T8527. 8.3 Determination of inspection results
8.3.1 If one of the items in Table 2 of factory inspection items is unqualified, the product shall be determined as a defective product.
8.3.2 Technical requirements for type inspection are shown in Table 2. The shell test, sealing test and shell material test of each butterfly valve to be inspected must all meet the requirements of the technical requirements in Table 2. For other inspection items, if one of the indicators of one of the butterfly valves to be inspected is lower than the requirements of the technical requirements in Table 2, it is allowed to re-sample the specified number of 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.
9 Marking
The marking of eccentric butterfly valves shall comply with the provisions of GB/T12220. 10 Supply
The supply of eccentric butterfly valve products shall comply with the provisions of JB/T7928. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Butterfly Valve Model Compilation Method
1 Butterfly valve model consists of the following eight units, compiled in the following order: Al
口口口
Valve Body Material Code
Nominal Pressure Value
(MPa×10))
Seal Fucai Code
Structural Form Code
-Connection Form Code
Transmission Mode Code
Butterfly Category Code
Nominal Diameter Value
Butterfly valve category codes are expressed in Chinese phonetic letters, see Table A1. Table A1
Signal Butterfly Valve
The transmission mode should comply with the provisions of JB308.
The connection form shall comply with the provisions of JB308.
The structural form code is expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering Construction Standard Full Text Information System
Double eccentric
Check butterfly valve
Multiple eccentric
TTKAONTKAca-
Engineering Construction Standard Full Text Information System
The valve seat sealing material code is expressed in Chinese phonetic letters, see Table A3. Al.5
Valve seat sealing
Surface material
Alloy steel composite
Asbestos rubber
Alloy steel composite
Graphite
Alloy steel
Note: The material code of the valve seat sealing surface directly processed by the valve body is represented by \W. When the valve seat and butterfly plate sealing surface materials are different, the low hardness material code is used. The rest should comply with the provisions of JB308. The nominal diameter value should comply with the provisions of GB/T1047. Al.6
The nominal pressure value should comply with the provisions of GB/T1048. The valve body material code should comply with the provisions of JB308. Al.8
Model Example
a)D73H-16C
Meaning: butterfly valve, handle drive, wafer connection, double eccentric structure, alloy steel sealing surface, nominal pressure 1.6MPa, valve body material is carbon steel. b)D373X-10
Meaning: butterfly valve, worm gear drive, wafer connection, double eccentric structure, rubber sealing surface, nominal pressure 1.OMPa, valve body material is gray cast iron. 9
Engineering Construction Standard Full Text Information System1 Type inspection should generally be carried out in any of the following situations: a) Trial type identification of new products or old products for transfer to factory 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 assessment during formal production; d) When the product is resumed after long-term shutdown; e) When there is a significant difference between the factory inspection results and the last type inspection; f When the national quality supervision agency proposes a type inspection requirement. 8.2.2 Type inspection items shall comply with the provisions of Table 2. 8.2.3 Type inspection sampling shall comply with the provisions of JB/T8527. 8.3 Determination of inspection results
8.3.1 If one of the items in Table 2 of factory inspection items is unqualified, the product shall be determined as a defective product.
8.3.2 Technical requirements for type inspection are shown in Table 2. The shell test, sealing test and shell material test of each butterfly valve to be inspected must all meet the requirements of the technical requirements in Table 2. For other inspection items, if one of the indicators of one of the butterfly valves to be inspected is lower than the requirements of the technical requirements in Table 2, it is allowed to re-sample the specified number of 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.
9 Marking
The marking of eccentric butterfly valves shall comply with the provisions of GB/T12220. 10 Supply
The supply of eccentric butterfly valve products shall comply with the provisions of JB/T7928. 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
(Appendix of the Standard)
Butterfly Valve Model Compilation Method
1 Butterfly valve model consists of the following eight units, compiled in the following order: Al
口口口
Valve Body Material Code
Nominal Pressure Value
(MPa×10))
Seal Fucai Code
Structural Form Code
-Connection Form Code
Transmission Mode Code
Butterfly Category Code
Nominal Diameter Value
Butterfly valve category codes are expressed in Chinese phonetic letters, see Table A1. Table A1
Signal Butterfly Valve
The transmission mode should comply with the provisions of JB308.
The connection form shall comply with the provisions of JB308.
The structural form code is expressed in Arabic numerals, see Table A2. Table A2
Structural type
Single eccentric
Engineering Construction Standard Full Text Information System
Double eccentric
Check butterfly valve
Multiple eccentric
TTKAONTKAca-
Engineering Construction Standard Full Text Information System
The valve seat sealing material code is expressed in Chinese phonetic letters, see Table A3. Al.5
Valve seat sealing
Surface material
Alloy steel composite
Asbestos rubber
Alloy steel composite
Graphite
Alloy steel
Note: The material code of the valve seat sealing surface directly processed by the valve body is represented by \W. When the valve seat and butterfly plate sealing surface materials are different, the low hardness material code is used. The rest should comply with the provisions of JB308. The nominal diameter value should comply with the provisions of GB/T1047. Al.6
The nominal pressure value should comply with the provisions of GB/T1048. The valve body material code should comply with the provisions of JB308. Al.8
Model Example
a)D73H-16C
Meaning: butterfly valve, handle drive, wafer connection, double eccentric structure, alloy steel sealing surface, nominal pressure 1.6MPa, valve body material is carbon steel. b)D373X-10
Meaning: butterfly valve, worm gear drive, wafer connection, double eccentric structure, rubber sealing surface, nominal pressure 1.OMPa, valve body material is gray cast iron. 9
Engineering Construction Standard Full Text Information System
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