GET DUAL PLATE WAFER CHECK VALVE SUPPLIER INFORMATION

What is a Dual Plate Check Valve?

The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight, and smaller in size compared to a conventional swing check valve or lift check valve.

The Double Plate Check Valve employs two spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by torsion spring action without requiring reverse flow.

This design offers the twin advantages of No Water Hammer and Non Slam simultaneously. All features put together to make the Dual Plate Check Valve NRV one of the most efficient designs.

Duo Disc Check Valves are available in wafer design, flanged wafer design, and extended design with flanged ends having face to face dimensions as that of a swing check valve. It is also referred to as SILENT CHECK VALVE.

Design & Testing International Standard of Dual Plate Check Valve NRV

Design Standard	API 594 / API 6D Standard
Inspection & Testing Standard	API 598
Flange To Flange Distance	As Per ANSI B API 594 / API 6D / ANSI B 16.10
End Connection	Wafer Type, Flangeless, Sandwich Pattern Suitable to mount between two flanges.
Manufacturing Size Range	3″ (DN80) to 48″(DN 600)
Pressure Rating of Valve	150# to 2500#

Features of Dual Plate Check Valves

• • Fire safe design

• • Self-seating design that reduces dragging along the seat surfaces

• • Lapped seating surfaces that exceed API 598 seat leakage requirements for metal-seated valves

• • An uninterrupted gasket surface

• • Shock bumpers minimize shock-force on internal components

• • Immediately responsive spring design to changes in flow characteristics

• • Seat faces lapped for smooth finish and superior sealing.

• • High torsion inconel springs for quick closing.

• • Each valve is shell and seat pressure tested per industry standard API 598.

Standard vs. Retainerless Body Designs

As a leading API 594 dual plate check valve manufacturer, our Dual Plate Wafer Check Valves are available in two different body styles—Standard and Retainerless. Both versions have the same performance, dimensions, and ratings. In all dual plate check valves, the center pin (off which the discs rotate) and the limiter bar (which prevents the discs from hitting each other) need to be affixed to the valve body. In a standard body style, the result is penetration through the body wall. In a retainerless design, a sleeve is inserted into the inside of the body, thus avoiding penetrating the body wall. This makes retainerless style valves particularly desirable and applicable for critical Hydrocarbon and Chemical processing applications, or any service where environmental safety or fire hazards are concerned.