CB 1285-1996 Ventilation Butterfly Valve Specification CB1285-1996 Standard download decompression password: www.bzxz.net

China State Shipbuilding Corporation Department Standard
CB1285--96
Specification for ventilation butterfly valves
Published on September 3, 1996
Implementation on April 1, 1997
1 Scope
1.1 Subject content
China State Shipbuilding Corporation Department Standard
Specification for ventilation butterfly valves
CB128596
Classification number: U54
This standard specifies the requirements, quality assurance provisions and delivery preparation for ventilation butterfly valves (hereinafter referred to as butterfly valves). 1.2 Scope of application
This standard applies to ship power compartment ventilation and cabin air-conditioning piping systems Reference documents
GB1561—79
GB3032—89
GJB 4.783
GJB 4.983
3 Requirements
Ship welded ventilation flanges
Marking of marine piping accessories
Ship equipment environmental testing
Vibration test
Impact test
Ship equipment environmental testing
3.1 Structure and specifications and dimensions
The type and basic parameters of the frequency control valve shall be as shown in Table 1.
Operation mode
Handle transmission
Worm transmission
Approved by China State Shipbuilding Corporation on September 3, 1996Working pressure
Nominal diameter
100～300
100～250
350～750
300～750
Implementation on April 1, 1997
CB1285—96
The structural dimensions of the butterfly valve with a working pressure of 0.05MPa are as shown in Figure 1, Figure 2 and Table 2. DN1DN100300e0wwW.bzxz.Net
Figure 1A type
Nominal diameter
DN350750
Figure 2B type
CB1285-96
Working pressure is 0.12MPa. The structural dimensions of the butterfly valve are as shown in Figure 1, Figure 2 and Table 3. Table 3
Nominal diameter
Installation method and code of worm gear transmission device are shown in Figure 3. Inlet
Lower hand wheel
Upper hand wheel
Left hand wheel
Foot code, direction and size are as shown in Figure 4 and Table 4. Left
Marking example
CB1285-96
Handle-driven ventilation butterfly valve with working pressure of 0.05MPa and nominal diameter of 150mm: Ventilation butterfly valve A0.5150CB3360-96
Medium inflow direction
Working pressure is 0.12MPa, nominal diameter is 300mm, and the worm gear installation method is I. The foot code is ventilation butterfly ventilation butterfly valve B1 1.2300
3.3 Materials
The main parts materials of butterfly valve are as shown in Table 5
Sealing diagram
CB3360-96
Carbon structural steel
Stainless steel
Chloroprene rubber
Stainless steel
Aluminum manganese bronze
Q235-A
SF8423
ZeuA19Mn2
GB1220
GB7040
GB1220
GB1176
3.4 ​​Performance
CB1285-96
Construction should be carried out according to standard construction drawings, and the dimensions of each component should meet the requirements of the drawings. 3.4.1
After the whole valve is assembled, the transmission mechanism should not be stuck. The strength test is carried out with ps=1.5p air pressure, and the sealing test is carried out with pm=1.2p air pressure. The pressure is maintained for 10 minutes. No leakage is allowed. The butterfly valve should be subjected to vibration test. After the test, there is no mechanical damage and loose fasteners. The butterfly valve should be subjected to impact test. After the test, there is no mechanical damage and loose fasteners. 3.4.6 After the impact and vibration test, repeat the test in Article 3.4.3. 3.5 Appearance
The outer surface of the butterfly valve is smooth and has no defects that affect the appearance. 4 Quality Assurance Provisions
Inspection Quality
The butterfly valve shall be inspected by the technical inspection department of the manufacturer. The butterfly valve submitted for acceptance must meet the requirements of Chapter 3 and Chapter 5 of this specification. 4.2 Inspection Methods
The butterfly valve shall be subjected to strength test and sealing test with air pressure according to the requirements of GB600. The results shall meet the requirements of Article 3.4.3. The media valve shall be subjected to vibration test according to the Class 1 main body area specified in GJB4.7, and the result shall comply with the provisions of Article 3.4.4. 4.2.2
The media valve shall be subjected to impact test according to the Class 5 requirements specified in GJB4.9, and the result shall comply with the provisions of Article 3.4.5. 4.2.39
5 Delivery preparation
5.1 Packaging
Before packaging, the flange sealing surface of the butterfly valve shall be covered with a cover plate, and the transmission parts shall be covered with vaseline. The butterfly valve shall be packed in wooden boxes. 5.2 Packaging
Butterfly valves shall be packed in boxes when leaving the factory, and there shall be a packing list in the box, which shall indicate the following contents: a. Name and standard number of the product;
b. Working pressure and nominal diameter;
c. Quantity per box;
d. Product certificate number.
5.3 Storage
Butterfly valves should be placed in a dry room and are not allowed to be stored outdoors. 5.4 Marking
5.4.1 The marking of butterfly valves shall comply with the provisions of GB3032. 5.4.2 The nameplate shall indicate the installation position of a single butterfly valve. Additional remarks:
This specification is proposed by China State Shipbuilding Corporation. This specification is under the jurisdiction of the Pipe System Accessories Sub-Technical Committee of the National Technical Committee for Standardization of Marine Machinery. This specification was drafted by the 704th and 603rd Institutes of China State Shipbuilding Corporation. The main drafters of this specification are Zhang Xiaoou and Wu Shaozeng. This specification is provided with unified construction drawings.
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