Axial Flow Check Valves

Size: 2″-12”(DN50-DN300)
Material: Ductile iron ASTM A536, 65-45-12
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 Axial Flow Check Valves?

Axial flow check valves are mechanical devices used in piping systems to allow fluid (liquid or gas) to flow in one direction while preventing backflow in the opposite direction. These valves are designed to open and allow flow when there is forward pressure and close to prevent reverse flow when the pressure drops or reverses. axial flow check valves play a critical role in maintaining the integrity and efficiency of piping systems by preventing backflow and ensuring the unidirectional flow of fluids.

Product Drawing

No. Part Standard Specification Options
1 Valve Body EN-GJS-450-10
2 Disc SS304+EPDM SS304+NBR
3 Spring SS304 SS316
4 Bushing SS304+PTFE
5 Diversion Body EN-GJS-450-10


DN Dimensions(mm)
inch MM L D D1 D2 C T n-φd
2″ 50 120 165 125 99 19 3 4-Φ19
2.5″ 65 150 185 145 118 19 3 4-Φ19
3″ 80 180 200 160 132 19 3 8-Φ19
4″ 100 240 220 180 156 19 3 8-Φ19
5” 125 300 250 210 184 19 3 8-Φ19
6″ 150 350 285 240 211 19 3 8-Φ23
8″ 200 450 340 295 266 20 3 12-Φ23
10″ 250 500 405 355 319 22 3 12-Φ28
12″ 300 550 460 410 370 24.5 4 12-Φ28

The Features of Silent check valve

Design: Axial flow check valves are typically designed with a disc or flap that moves axially (along the direction of flow) within the valve body. When the pressure on the upstream side exceeds that on the downstream side, the disc or flap opens, allowing fluid to flow through. When the pressure on the downstream side becomes greater, the disc or flap closes, preventing backflow.
Functionality: These valves operate based on the principle of differential pressure. They require a certain pressure differential across the valve to open and allow flow. Once the pressure equalizes or reverses, the valve closes to prevent backflow.
Advantages: They offer low resistance to flow when open, which minimizes pressure drop in the system. They are also relatively simple in design and reliable in operation.

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.