Dual plate check valve



Valve design

based on API 594 standard and customer requirements 

Temperature range
-320 to 662°F (-196 to 350°C)

NPS 2-48 (DN 50- 1200)

Pressure rating

ASME 150 - ASME 2500

As per API 594 Standard. Also complies with API 6D, ISO 14313, ASME B16.10
End connections

RF, RTJ as per B16.5 &B16.47

Body design

Lug, Wafer or Double flanged configuration in forged or cast one-piece

Seat design

Metal-seated with hardfacing on disks and seat


Retainerless design-no holes through the body wall, therefore emission-free  
Light-weight discs for fast closing without backflow 
Shock bumpers- extended cycle life of valve trim with minimal wear under the most severe services 
Spring assisted design
Extended seat life- no dragging effect in the valve fully open position. The integrity of the sealing area is extended
Good dynamic response
Low pressure drop 
Intrinsically fire safe- no drilling through the body wall 
Compact and lightweight 



Testing & certifications

Compliance with API 594 or API 6D,ISO 5208 and API 598 inspection and testing
Fire safe and fire tested as per API 6FA/607
PED 2014/68/UE

Proquip dual-plate check valves offer a unique compact design with high performance. The special retainerless body and the quick acting spring provide a fast-acting response to flow reversal, minimizing stress and maximizing service life. 
The valve is designed with two discs hinged at their sides like a door, eliminating the effect of gravity. Consequently, very little energy is needed to open the valve and maintain this position, resulting lower energy loss.
The reduced weight of a dual-plate valve disc versus the full-bodied swing check is a major factor in minimizing slamming and water hammer–making it the optimal solution to ensure system safety. Material selection is fully customizable to meet customers project specifications