Dual Plate Check Valve


Check valve is usually installed in linesystem, prevent medium from flowing back. Check valve is an automatic valve that itis open and close by pressure of fluid.

Against the problem of traditional check valve, we accord AMERICA API&GERMNEY DIN, after study and research for many years, developed H76 lug body type wafer, double-disc swing type wafer check valve, H74 swing single-plate wafer check valve, H71 lift wafer check valve, and series of those products. Used in the industry of oil, petro, metallurgy, electric, light industry, food, received high appraisal from customers.


Applicable Standards

· Design Standard: API 6D, API 594, BS1868, API602

· Nominal Dimension: Casting Valve: 2”-48”, Forging Valve: 1/4"~2"

· Nominal Pressure: Class 150-2500

· Connection type: WAFER, LUG, FLANGE, ETC.

· Structure: Bolted Bonnet, Welded bonnet, Pressure seal, Double disc, Tilting disc,”Y” pattern,Non Slam design.

· Material:DI, CS, SS, DSS,LTCS, Inconel ,Monel, Bronze,Aluminum Bronze

· Operation: Damper and counterweight(optional)


Design StandardGB/T12221API6DAPI594
Pressure-Temperature RatingGB/T12224ASME B16.34
Face to FaceFactory standardAPI6DAPI594
Flange EndsGB/T9113JB/T79ASME B16.5, ASME B16. 47
Inspection & TestJB/T9092/GB/T13927API598/API6D
Test Pressure(MPA)Shell Test CL150CL150CL300CL400CL600CL900CL1500

High Pressure

Seal Tes

2.937.5810.015.022.437.5

Low Pressure

Seal Test

2.075.527.3111.0316.5427.5


Check valve is usually installed in linesystem, prevent medium from flowing back. Check valve is an automatic valve that itis open and close by pressure of fluid.

Against the problem of traditional check valve, we accord AMERICA API&GERMNEY DIN, after study and research for many years, developed H76 lug body type wafer, double-disc swing type wafer check valve, H74 swing single-plate wafer check valve, H71 lift wafer check valve, and series of those products. Used in the industry of oil, petro, metallurgy, electric, light industry, food, received high appraisal from customers.


Applicable Standards

· Design Standard: API 6D, API 594, BS1868, API602

· Nominal Dimension: Casting Valve: 2”-48”, Forging Valve: 1/4"~2"

· Nominal Pressure: Class 150-2500

· Connection type: WAFER, LUG, FLANGE, ETC.

· Structure: Bolted Bonnet, Welded bonnet, Pressure seal, Double disc, Tilting disc,”Y” pattern,Non Slam design.

· Material:DI, CS, SS, DSS,LTCS, Inconel ,Monel, Bronze,Aluminum Bronze

· Operation: Damper and counterweight(optional)


Design StandardGB/T12221API6DAPI594
Pressure-Temperature RatingGB/T12224ASME B16.34
Face to FaceFactory standardAPI6DAPI594
Flange EndsGB/T9113JB/T79ASME B16.5, ASME B16. 47
Inspection & TestJB/T9092/GB/T13927API598/API6D
Test Pressure(MPA)Shell Test CL150CL150CL300CL400CL600CL900CL1500

High Pressure

Seal Tes

2.937.5810.015.022.437.5

Low Pressure

Seal Test

2.075.527.3111.0316.5427.5


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