This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of flange suction check valves with flange connection dimensions in accordance with GB 569 and GB 2501. This standard is applicable to ship piping systems with media such as oil, seawater and fresh water. CB/T 3478-1992 Flange Suction Check Valve CB/T3478-1992 Standard download decompression password: www.bzxz.net

Ship Industry Standard of the People's Republic of China
CB/T3478-92
Flange Suction Check Valve
Published on August 21, 1992
China Kaiyou Industry
Implemented on May 1, 1993
Shanghai Ship Industry Standard of the People's Republic of China
1 Subject Content and Scope of Application
CB/T3478--92
Classification Number: U52
Generation C-2%
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of flange suction check valves (hereinafter referred to as suction check valves) with flange connection dimensions in accordance with GB569 and GB2501. This standard applies to ship piping systems with media such as oil, seawater and fresh water. 2 Reference standards
GB2051
GB3032
Marine flange connection dimensions and sealing surfaces
General technical conditions for ship pipeline valves
Marine flange connection dimensions and sealing surfaces (four-digit) Marking of ship pipeline accessories
ZB/TU52001 Wall thickness of marine casting valves
3 Product classification
3.1 The types of suction check valves are specified as follows: R type - flange connection dimensions according to GB569 soft seal suction check valve; RS type - flange connection dimensions according to GB2501 soft seal suction check valve; Y type - flange connection dimensions according to GB569 hard seal suction check valve: YS type - flange connection dimensions according to GB2501 hard seal suction check valve. 3.2 The basic parameters of the suction check valve are specified in Table 1. Table 1
R, RS.Y, YS
3.3 Structural dimensions of suction check valves
3.3.1 Structural dimensions of cast iron suction check valves3.3.1.1 The structural dimensions of R-type suction check valves shall be as specified in Figure 1 and Table 2. 3.3.1.2 The structural dimensions of RS-type suction check valves shall be as specified in Figure 1 and Table 3. Approved by China State Shipbuilding Corporation on August 21, 1992: Nominal diameter DN, mm
Implementation on May 1, 1993
Nominal diameter
Structural dimensions
CB/T3478—92
R type, RS type
and, pieces
Heavy salt, kg
Nominal diameter
Structural dimensions
Structural dimensions of cast copper suction check valve
CB/T347892
The structural dimensions of R type and Y type suction check valves shall be as specified in Figure 2 and Table 4. The structural dimensions of RS type and YS type suction check valves shall be as specified in Figure 2 and Table 5. D
R type, RS type
Y type, YS type
Weight, kg
Nominal diameter
Nominal diameter
Marking example
Structural dimensions
Structural dimensions
3—92
CB/T3478
Four, pieces
Month, pieces
Nominal diameter is 80mm, flange connection size is according to GB569 soft sealing flange cast iron suction check valve; suction check valve R80TCB/T3478—92| |tt||The nominal diameter is 80mm, and the flange connection dimensions are in accordance with the soft seal flange cast iron suction check valve of GB2501. Suction check valve RS80TCB/T3478-92
The nominal diameter is 80mm, and the flange connection dimensions are in accordance with the hard seal flange cast copper suction check valve of GB569: Y80HCB/T3478-92
Suction check valve
Technical requirements
The technical requirements for suction check valves are in accordance with G No. 600 4.1
The main parts and materials of suction check valves are in accordance with Table 6. 4
Weight, kg
R type Y type
Weight base, kg
RSYS type
5.0041.97
Parts name
Suction port
R type, RS type
Y type, YS type
Seal ring
CB/T3478--92bzxz.net
Oil-resistant rubber or soft polyacrylate
Silicon brass
The flange connection dimensions of the suction check valve shall comply with GB569 and GB2501, and the test methods and inspection rules
The test methods of the suction check valve shall comply with GB600. The items for type inspection and factory inspection shall comply with Table 7. Table 7
Mechanical properties and chemical composition analysis of castings
Appearance inspection
Strength and material tightness test
Sealing test
ZHSi80-31
HSi80-3
ZHSi80-31
Should comply with the provisions of GB9439 and CB883
Should comply with the provisions of GB600
Test pressure P. is 0.2MPa
Test time is in accordance with the requirements of GB600
Test pressure is P, 0.05~0.1MPa
Test time is in accordance with the requirements of GB600
5.3 Each suction check valve can be shipped only after it passes the inspection item by item according to Table 7. Marking and packaging
6.1The marking of the suction check valve shall be in accordance with the provisions of GB3032. 6.2 The packaging of the suction check valve shall comply with the provisions of GB600. Additional remarks:
This standard was proposed by the Pipe Accessories Sub-Technical Committee of the National Technical Committee for Standardization of Marine Machinery. This standard was submitted by the 603 Institute of China State Shipbuilding Corporation. This standard was drafted by Dalian Jinzhou Valve Factory with the participation of the 603 Institute. The main drafters of this standard are Xin Kehai, Li Jize and Wu Shaozeng. This standard is provided with a unified construction drawing.
Standard number
GB9439
GB4426
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