High pressure and high temperature aren't the only markers of severe service. High cycling is just as destructive, and it's where standard swing check valves fail fastest.

In digester and boiler feedwater applications, constant pressure cycling causes disc instability and accelerated internal wear.

Standard swing checks in both applications typically last months.

DFT severe service check valves, the GLC SS, WLC SS, Excalibur SS, and WLC BF, are built with upgraded internals specifically for high-cycling conditions: 17-4 trim, X-750 springs, and hardened components engineered for years of service life.