Spence Strainers International,of Walden, NY, announces FM (Factory Mutual) approval of their Model 125WT, ASME Class 125, cast iron, double door check valves in size 2 in. through 10 in. FM approved products provide the highest quality of fire and environmental hazard protection of commercial property. The 125WT Series double door check valves prevent severe water hammer from the backflow of a pressure tank when automatic controls shut down a fire pump.

Spence Strainers International also offers ASME Class 125, 150, 300 and 600 double door check valves in cast iron, carbon steel and stainless steel, in sizes 2 in. through 24 in., for pressures to 1,480 psig and temperatures to 600