DESIGNED FOR LONG LIFE SERVICE

Integral straightening vanes reduce turbulence in incoming flow, thus minimizing noise, vibrations, erosion, cavitations, and other factors that could result in premature valve failure.

MINIMAL HEAD LOSS

Head loss is minimized by straightening vanes that help create laminar flow.  A large cross-sectional area also lessens pressure drop across the check valve.  Unlike typical conical constructions that restrict flow, the Series 50 Check Valves have a compression spring coupled with a small stem guide that allows for an unobstructed flow path.

QUICK CLOSURE TO REDUCE WATER HAMMER

Silent shut-off is achieved via the fully automatic, spring-assisted disc that closes near zero flow velocity.  The lightweight, center guided disc design creates a positive shut-off prior to flow reversal and helps to keep slamming and surges to a minimum.  Additionally, the low cracking pressure of the Series 50 check valve reduces the amount of energy required to open the valve.

METAL-TO-METAL SEATS

Precision machined sealing surfaces allow the Series 50 check valve to maintain a tight seal that meets or exceeds API 598 leakage requirements.  Resilient seats are also available to provide bubble tight seals.  Sealing is further improved by an additional gasket assembled with the seat - independent of the flange gasket.

VERSATILE AND ECONOMIC DESIGN

Clearance within the valve's body allows a butterfly valve to be installed directly on the outlet side of the valve without extra piping.  Because the trim for the Series 50 check valves are interchangeable, various seats, discs, and springs are available and easy to replace.  Exotic spring material, such as Monel or Inconel 750-X, can easily be substituted for the standard stainless steel.