Keckley Company manufactures and supplies wafer silent check valves and wafer double disc check valves. The wafer silent check valves are available with cast iron, carbon steel, or stainless steel bodies, and are installed between ASME Class 125, 150, 250, or 300 flanges. The wafer double disc check valves are available in the same body types as the silent check valves, and in sizes from 2 inches to 48 inches. The valves also feature working pressures of 150 psi or 200 psi at 150F; 285 psi, 275 psi, 720 psi, or 740 psi at 100F.

Metraflex manufactures wafer-style silent check valves available in standard sizes from 2" through 10". Rated to 125lb. and 250lb. flange class, the valves feature a cast iron body with bronze or stainless steel trim. Intended for liquid service only, the valves also feature working pressure of 200 psi or 400 psi @ 150F.