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Stainless Steel Flange Check Valve

Stainless Steel Flange Check Valve

– Bolted Cover
– Swing Type
– Horizontal or Vertical lines
– Welded Seat
– Renewable Seat Rings

COVNA company main produce: Stainless Steel Flange Check Valve

Overview

Check valves, also known as one-way check valves or check valves, are designed to prevent backflow of media in the line. The opening and closing parts are opened or closed by the medium flow and force to prevent the medium from flowing backwards. On pipes used for one-way flow of media, only the media is allowed to flow in one direction to avoid accidents. When the inlet side pressure is lower than the outlet side, the flap automatically closes the passage under the action of fluid pressure and its own weight.

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Stainless Steel Flange Check Valve

Double Flap Check Valve

Vertical Check Valve

Swing Check Valve

H41, H42 Specification

Specification
Nominal Pressure2.54.06.410.0 MPa
Shell Test3.756.09.615.0
High Pressure Sealing Test2.754.07.0411.0
Low Pressure Sealing Test0.6
Applicable MediumCPRN
Water, Oil, Steam.Nitric, Acid.Acetic AcidLPG
Applicable Temperature≤425℃≤100℃-40~+80℃

H44 Specification

Specification
Test PressurePN Nominal Pressure
2.52.56.410
Shell Test3.756.09.615
Seal Test(Liquid)2.754.47.011
Seal Test(Gas)0.6
Applicable MediumCPR
Water, Oil, Steam.Nitric AcidAcetic Acid
Applicable Temperature≤425℃≤200℃≤200℃

H71 Specification

This kind of check valve is among the products that introduced the advanced foreign technologies. This product adopts the abrasion proof alloy of good quality as the main sealing material and reduces the possibility that the pipe medium will check in low-pressure conditions. Popular among users, the product is widely used in industries of electric power, petroleum, chemical and refining.

Specification
Nominal Pressure1.01.62.54.0
Strength Test (Water)1.52.42.756.0
Hight Seal Test (Water)1.117.838.544
TypeH71HWY-10.16.25.40CPRH71 HWY-10.16.25.40CPRH71HWY-10.16.25.40CPR
Material CodeCPR
Applicable MediumWater, Steam, Air, Oil.Nitric AcidAceticacid
Applicable Temperature≤425℃≤200℃≤200℃

Swing Check Valve

Specification

1. Design And Manufacture Comply With BS 1868, JIS B2071
2. Face to Face Dimension Comply
ANSl 150-2500Lb, ANSL B16.10
JIS10/20K, JIS B2001
3. Connection Flange
ANSI 150-2500Lb, ANSL B16.5
JIS10/20K, JIS B2212, B2214
4. Test and inspection ace to API 598

Construction B.B,Swing Type

Main Material

WCB, WC6, WC9, CF8, CF8M, CF3, CF3M

Double Flap Check Valve

Main Technique Number
TypeNominal PN(MPa)Test Stre Ngth Pressure (MPa)Test Seal Pressure (MPa)Applicable Temperature (℃)Applicable Media
H76X-10 H77X-101.01.51.1≤80 Clean-water Slops Sea
H76X-16 H77X-161.62.41.76
Material For Main Parts
Name Of PartBodyDiscStemSpringSeat
MaterialBowl-shaped, Steel, Stainless Steel.Bowl-shaped, Steel, Stainless Steel.Stainless, Steel.Stainless, Steel.NBR, Stanless, Steel

Check Valve

This valve is a safety device mounted in the pipeline or pump outlet to prevent the pump from inversed running due to the differential water hammer’s shock in the pipeline when the pump stops and features a brand-new structure, small volume, light weight,small fluid resisteance, reliable seal, stable open-close, long duration, better energy-saving effect.

Suitable for the pipeline related to water supply and drainage, fire-fighting, warming etc. Systems or the pump outlet to prevent both pump and pipeline from being damaged due to the water hammer produced when the medium flows back and form the silencing effect.

Main Technique Number
Nominal Pressure Pn (mm)1.01.6
Test Pressure (Mpa)Shell Strength1.52.4
Sealing Performance1.11.76
Working Temperature(℃)≤80
Applicable MediumClean-water, Sea.
Slow-close Time(S)0~60
Material For Main Partes
Name Of PartBodyDiscStem, Oil Cylinder, Oil CorkSpringSeat
MaterialCI, Bowl-shaped, SteelBowl-Shaped, Steel, Stainless SteeStainless SteelStainless SteelNBR

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COVNA company main produce: Stainless Steel Flange Check Valve

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