Silent Check Valve

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

Overview of Silent check valve?

Silent check valve refers to a valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium. Drainage of container media.

Product Drawing

No. Part Standard Specification Options
1 Valve Body EN-GJS-450-10
2 Stem SS420 SS304,SS316,SS431
3 Hinge Bushing Brass Hpb59-1
4 Spring SS304 SS316
5 Nut SS304 SS316
6 Disc EN-GJS-450-10
8 Hinge Bushing Brass Hpb59-1
9 Seat EN-GJS-450-10
10 O-Ring NBR EPDM
11 Screw Carbon Steel Zinc Plated SS304,SS316


DN PN Dimensions(mm)
inch MM L D D1 d C T n-φL
2″ 50 10/16/25 120 165 125 99 19 3 4-Ø19
2.5″ 65 10/16/25 135 185 145 118 19 3 4-Ø19
3″ 80 10/16/25 155 200 160 132 19 3 8-Ø19
4″ 100 10/16 165 220 180 156 19 3 8-Ø19
25 165 235 190 156 19 3 8-Ø23
5” 125 10/16 190 250 210 184 19 3 8-Ø19
25 190 270 220 184 19 3 8-Ø23
6″ 150 10/16 210 285 240 211 19 3 8-Ø23
25 210 300 250 211 20 3 8-Ø28
8″ 200 10 260 340 295 266 20 3 8-Ø23
16 12-Ø23
25 260 360 310 274 22 3 12-Ø28
10″ 250 10 285 405 350 319 22 3 12-Ø23
16 355 12-Ø31
25 285 425 370 330 24.5 3 12-Ø28
12″ 300 10 315 460 400 370 24.5 4 12-Ø23
16 410 12-Ø28
25 315 485 430 389 27.5 4 16-Ø31

The Features of Silent check valve

1) The valve body adopts the design of “waist drum”, which improves the flow direction of the medium, reduces the flow resistance coefficient, and reduces the noise, and there is no noise during use.
2) The valve adopts a short structure. Although the head loss is slightly larger than that of the lift mute check valve, it is small in size and cheap in price.
3) The structure is compact, a non-metallic lubricating sleeve is installed between the guide shaft and the guide frame, and the valve disc can be raised and lowered flexibly without locking.
4) The skeleton rubber sealing ring is directly inlaid on the valve body, which avoids the direct erosion of the sealing ring by the medium for a long time, and the service life is significantly prolonged, and it is strong and durable.
5) The valve disc has a short opening and closing stroke, which can effectively prevent the occurrence of water hammer.
6), suitable for water supply and drainage system, high-rise building pipe network, can be installed at the outlet of the pump, the structure is slightly modified, can be used as a suction bottom valve, but not suitable for sewage pipe network

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.