Dezurik’s APCO Surge Relief Angle Valve (SRA) was engineered to limit potential damage to pump systems. The valve limits the surge pressure magnitude commonly associated with sudden pump shutdown in fluid piping systems.
Designed with a smooth flow area and minimal obstructions for efficient surge relief, the SRA valve protects the system by opening when the system pressure exceeds the relief pressure setting of the valve disc. As the disc opens, the surge pressure is spilled and dissipated through the valve. The valve will remain open as long as the system pressure exceeds the valve’s relief pressure setting, and slowly begin to close at an adjustable rate as pressure subsides.
The SRA is an elbow body style surge relief valve that is held normally closed by a compression spring or system of nested springs. SRA valves are available in sizes 2-16″ (50-400mm) and with pressure relief ratings up to 200 psi (1380 kPa). They are available in ductile iron with seats of Acrylonitrile-Butadiene (NBR), Terpolymer of Ethylene, Propylene and A Diene (EPDM) or Fluoro Rubber (FKM).