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Duo disc Spring loaded Check Valve

Product name: Duo Disc Spring Loaded Check Valve (also named as Dual Plate Check Valve or Swing type Butterfly Check Valve)

Dual plate check valve offer an inexpensive way to protect your pipeline, it is light in weight, compact designed, short structured, low flow resistance, compared with traditional flanged swing check valve. 

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Standard and scope
Size: NPS  2"~48" DN50~DN1200   
Pressure Rating: Class 150~2500 PN2.5~PN420              
Connection: wafer type, flanged type, full lug type or split lug type, if requied Butt weld end, Hub end also available
Body Material: Carbon Steel, Stainless steel, Duplex and Super duplex, Titanium, Inconel
Disc: Stainless Steel, Duplex and Super duplex, Titanium, Inconel
Spring: Inconel
Seat: Integral metal, metal insert or resilient seated (BUNA N, EPDM, Viton)
Design and Manufacture: API594 and API 6D, JB/T8937,BS EN 1868,DIN 3840
Inspection and Test:API 598 or API 6D, BS EN12569,EN12266.1
End flange dimension:ASME B16.5(for NPS≤24);ASME B 16.47 series B(our normal standard)、API 605 or ASME B16.47 series A、MSS SP-44(for NPS>24; BS EN 1092-1
End to end:ASME B16.10, BS EN 558-1, DIN 3202 F1, ISO 5752
Pressure-temperature ratings:ASME B16.34, DIN2401
Working Temperature:  -196 C~540 C

Design feature
Double disc check valves have been specifically engineered to maximize the prevention of reverse flow. These Valves can be manufactured from a wide range of our specialist materials, enabling them to be able used in kinds of conditions where require long service life and anti-corrosion, such as water, steam ,oil, and other chemical products.

Retainerless Body
Integral Seat
Spring Assisted 
One piece body, means simple and reliable 
Dual plate disc , Renewable split disc 
Horizontal or vertical installation are available
Slim plate design
Corrosion protection, Inside and outside epoxy coating if required

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