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Product Description:


Quick Details

Standard or Nonstandard:





Medium Pressure





Temperature of Media:

Medium Temperature



Port Size:


Place of Origin:

China (Mainland)

Model Number:

Check Valve

Brand Name:







Customer's Request


Flanged/ Threaded


ISO9001:2008 CE/TS

Body material:

casting steel/stainless steel/iron

Packaging & Delivery

Packaging Details:

Export Standard Polywood Case/Wooden Pallet

Delivery Detail:

15 days


Material of Construction:

Cast Iron

: IS 210 Gr FG 200

Cast Carbon Steel

: ASTM A 216 Gr WCB / WCC   

Cast Stainless Steel

: ASTM A 351 Gr CF 8/CF 8M

Forged Carbon Steel

: ASTM A 105

Forged Stainless Steel

: ASTM A 182 Gr F304 / F316

Design & Testing International Standard:

Valve Design

: API 594 / API 600(ISO 10434) / API 6D(ISO 14313) / API 602 / API 603 / API 608 /    API 609 / IS 780 / BS 1414 / BS 14846 / BS 1868 / BS 1873 / BS 5351 / ASME B 16.34(BS 5351) / DIN 3352 / DIN 3356 / DIN 3357

Pressure Testing

: API 598 / API 600 / API 6D

Face To Face

: ANSI B 16.10

End Connection


Flange Connection

: ANSI B 16.5 (For NPS≤24) / ANSI B 16.47 SERIES B, ANSI 16.47 SERIES A, MSS SP-44 (For NPS >24)

Butt Weld End

: ANSI B 16.25

Socket Weld End

: ANSI B 16.11

Screwed End

: ANSI B 1.20.1(BSP/NPT)

Wall Thickness

: API 600 / BS 1868

Pressure Rating

: AS PER ANSI 125#, 150#, 300#, 400#, 600#, 800#, 900#, 1500#, 2500#

Engineering Option

: Gear Operated, Electrical Actuated, Pneumatic Actuate

Size Range

: AS PER NPS 2" - 48"





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Q:What is the difference between the H44H check valve and the H41 check valve?
Swing check valve H44HLift check valve H41HThe installation of check valves (Check, Valve) shall pay attention to the following items1. Do not allow the check valve to bear weight in the line.
Q:What's the W in the check valve H44W?
W represents the sealing surface is the body seal, that is, directly from the valve body out of the sealing surface
Q:What are the main types of check valves?
Check valve structure of the main drop type, DL swing and butterfly, JB/T308 provides the structure code.
Q:Which type of check valve should be selected for vertical pipes?
The check valve on the vertical pipeline shall ensure that the spool goes back to its position when the fluid is stationary and reversed.Optional:Butterfly check valves, pipes of low pressureVertical lift check valve, high pressure resistance, good tightnessSwing check valve: flow must be from the next up, the pipe diameter is unlimited
Q:The difference between slow closed valve and open the valve
The difference is mainly that the opening and closing of the slow closing check valve depend on the external and external forces to perform the slow opening and closing (usually hydraulic cylinder or pneumatic cylinder). The swing check valve is opened and closed by the pressure of the pipe medium to complete the opening and closing (and the pressure of the pipeline).
Q:How can the fast closing noise check valve prevent water hammer?
Quick closing silencing check valve prevents water hammer principle:Once the pump stopped, check valve spool in the spring or other auxiliary device for double end under the action of force balance in advance to the closed position, can greatly reduce the amount of water and initial water reflux falling height, water hammer force is calculated by gravity superposition, reduce the amount of return equal to the reduction of gravity. Fall short height reduces the inertia time is also relatively reduced speed, and can prevent the formation of destructive or reduce water hammer water hammer.Quick closing and silencing check valve and silencing check valve is to rely on the flow of the medium itself automatically open and close the valve, backflow valve to prevent the media, also known as check valve, check valve, silent check valve reflux valve, and back pressure valve. The check valve belongs to an automatic valve, whose main function is to prevent the backflow of medium, prevent the reverse of pump and drive motor, and release the container medium. The check valve can also be used to provide a supply to the auxiliary system where the pressure may rise above the system pressure. The check valve can be mainly divided into swing check valve (rotating by gravity center) and lift check valve (moving along the axis).
Q:What is the function of the check valve installed in the water meter before entering the residential water?
Generally installed after the water meter. The main reason: if the water point is higher than the water meter installation position, once the pipe network in the absence of water, the remaining water in the pipeline will flow in the direction of the water meter in turn. This will cause the water meter to reverse and cause damage to the water meter. A check valve is installed after the water meter, so that the situation can be avoided.The main function of the check valve is to prevent the backflow of the medium, prevent the reverse of the pump and drive motor, and release the container medium. The check valve can also be used to provide a supply to the auxiliary system where the pressure may rise above the system pressure.
Q:What is the reason that the valve is not used for a period of time?Anonymous browsing | 314 times
7, when installing check valve, should pay special attention to medium flow direction, should make medium normal flow direction and the direction of the arrow on the valve body is consistent, otherwise it will cut off the normal flow of media. Valve should be installed at the bottom of the pump suction pipe.The general formula 8, lift check valve should be installed in horizontal pipe, vertical lift check valve and bottom valve is usually installed in a vertical pipe on the road, and the bottom-up flow of media.9, the check valve closes, will produce water hammer in pipeline pressure, will lead to serious damage to the valve and piping or equipment, especially for the big pipe or high pressure pipeline, it should pay attention to those who use check valve.
Q:What does the H/F/P stand for in the check valve H41H/H41F/H41P?
The first H represents the check valve, the 4 represents the flange, and the 1 represents the lift type, and the second H represents the seat seal surface. The material is alloy steel or stainless steel. The P H41P said seating for boron steel
Q:How much is the check valve for the concrete pump?
31 concrete pump price ranging from 15W to 60W, different configurations have different prices, which one do you want?

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