Cast Steel Check Valve

Size: 2″-12”(DN50-DN300)
Material: Carbon steel, Stainless Steel
Type: MSS SP-126 Silent Check Valve, ANSI STANDARD, BS STANDARD
Design Standard: API594, JB/T8937, MSS SP-125
Connection:BS EN 1092-2 PN10/16/25, Flange to ASME B16.1 CL 125
Pressure Rating: 175PSI, 200PSI, 250PSI, 300PSI, PN10, PN16, PN25
Temperature: 0-80 ℃
Surface Treatment: ANSI/AWWA C550
Medium: Water, gas etc.

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Product Description

Products Details

What is Cast steel check valve?

The swing check valve is a kind of check valve that the valve flap opens and closes with the upward rotation of the rocker arm, which can automatically prevent the backflow of the fluid. The disc of the check valve swings upward under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the valve disc will automatically close under the action of fluid pressure difference, gravity and other factors to prevent the fluid from flowing back.

Product Drawing

Part name Material
Body WCB, stainless steel
Bonnet WCB, stainless steel
Seal ring graphite+304
Disc WCB+Stainless Steel,Stainless Steel
Rocker arm WCB, stainless steel


Nominal pressure (Mpa) Strength test (MPa) Seal test (MPa) Applicable temperature (℃) Applicable medium
1 1.5 1.1 ≤350℃ Cast steel: water, air, oil
Stainless steel: weak corrosive medium
1.6 2.4 1.76
2.5 3.75 2.75
4 6 4.4
6.4 9.6 7.04

Features of Cast Steel Check Valve:

1) The swing check valve has reasonable structure, reliable sealing, small flow resistance and excellent performance.
2) Good scratch resistance and long service life.
3) Various piping flange standards and sealing surface types can be used to meet the needs of various working conditions.
4) The valve disc rotates around the pin outside the valve seat to reduce the violent impact when closing.
5) The connection between the pin shaft and the valve disc adopts a built-in structure, which is more reliable in use.

Malleable Iron SCC Short Compression Coupling NPT Thread

Application and Case

Products are used in fire protection system, water system, HVAC system, plumbing, gas system, irrigation system, etc.These products are used in many projects , such as China Taiwanese Building 101, Xiamen Building,Wuhan Expo Building and other famous landmark projects.


1. What is the minimum quantity of the order?
Answer: The purchase volume of mixed products is 4 tons

2. How long is the delivery time of the order?
Answer: The delivery time for general orders is about 30 days. If the order is urgent and we have stock, around 7 days.

3. What payment methods do you accept?
Answer: We accept payment terms such as TT, L/C, DP, Western Union, Paypal, etc.

4. Where is your departure port of shipment? Is it possible to deliver to the designated warehouse?
Answer: The port of departure of our goods is generally Tianjin Port or Qingdao Port. We can transport the goods to designated warehouses, such as Yiwu, Guangzhou, etc.

5. What certificates do your products have?
Answer: Our products have FM/UL certificates, and we cooperate with third-party quality inspection certification before the factory, such as SGS,TUV

6.What are the series of your products?
Answer: Our products are divided into heavy series, medium series and light series according to different markets and standards. In order to buy more competitive products for you, please communicate your purchasing needs with the salesperson.

7. Do product packaging cartons and labels support customization?
Answer: Packaging cartons and labels can be customized according to customer requirements.

8.Does the purchased product support customization?
Answer: The product supports customization, but there are purchase quantity requirements and mold costs. For details, please consult the salesperson.

9.What are the packaging methods of the product?
Answer: The packaging of the product includes carton packaging, pallet packaging, wooden box packaging, and woven bag packaging.