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Proquip® dual plate check valves

Proquip® dual-plate check valves are designed for a wide range of applications. Their lightweight design, up to one fifth the weight of full-bodied swing check valves, reduces costs, space, and pipe support installation. Ideal for efficient and cost-effective performance.

Large industrial pipes with bolted flanges supported by metal structures in a facility, with platforms and railings visible in the foreground. Scaffolding and assorted equipment appear in the background.

Body design

A 3D rendering of a metallic wafer check valve with a hinge and spring mechanism visible inside the circular body, shown against a light blue background.

Design maximizes the flow path area through the valve with a lower pressure drop.

Disc and side hinges

A green, circular, hinged plastic component with a central vertical split and two mounting holes on either side, viewed against a light blue background.

The reduced weight of the disc maximizes the flow through the valve.

The disc side hinges eliminate the effect of gravity as very little energy is needed to open the valve and maintain this position, resulting in lower energy costs.

Quick acting springs

Close-up of a green, circular mechanical component with "VELAN XXXXX" and "508-24673-XXX" engraved on it. A coiled spring and two rods are visible along the central axis.

Springs provide a fast-acting response to flow reversal, minimizing stress and maximizing service life.

Shock bumper

Shock bumper arrangement on the back of each disc reduces the shock force on the hinges; ensuring internal components have an extended cycle life with minimal wear under the most severe service conditions.

PressureASME 150-2500, API 6A 2000-5000
SizeNPS 2-60 (DN 50-1500)
Tests and Design StandardsASME B16.10, ASME B16.11, ASME B16.20, ASME B16.25, ASME B16.34, ASME B16.47, ASME B16.5, ASME Section III, ASME Section VIII, ASME Section IX, API 6D, API 594, API 609, API 624, API 598, ISO 14313
Fugitive EmissionsRetainerless emission-free design that has no holes through the body wall, making leakage to the outside impossible.