Proquip dual-plate check valves: Butt weld end type


  • Size range(s)
    NPS 3-36 (DN 80-900)
    Pressure rating
    ASME Classes 150-600
    Standard connections
    Butt weld

Features and benefits

Velan Proquip butt weld end dual-plate check valves are made of carbon, stainless, or alloy steel to handle an extensive range of applications. The butt weld ends are designed to be directly welded into a piping system. 

  • Retainerless emission-free design. With no holes through the body wall, leakage to the outside is impossible. 
  • Body surface with uninterrupted gasket surface.
  • Intrinsically fire safe.
  • The reduced weight of the disc minimizes slamming and water hammer.
  • The disc side hinges, eliminate the effect of gravity resulting in lower energy costs when installed in a horizontal pipeline. 
  • Design maximizes the flow path area through the valve with a lower pressure drop. The internal retention method does not encroach on the gasket sealing surface.
  • Springs provide a fast-acting response to flow reversal, minimizing stress and maximizing service life.
  • Shock bumpers extended cycle life of internal components with minimal wear in severe service.
  • Extended seat life due to the clearance between the disc hinge and hinge pin which eliminates any dragging effect from the discs.
  • Velan Proquip dual plate check valves easily meet and exceed test requirements of API 598 for metal-seated check valves.

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© Velan Inc. All rights reserved.
IgnitionWeb High-Touch Communications
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