Miller Center Guided Valves are Shock-Proof and entirely silent in operation and completely eliminates all "water hammer", water back-lashing or turbulence, giving longer, trouble-free life to the entire piping installation. Miller Center Guided Check Valves installed in the discharge line of a pump prevents all back flow, dampens dangerous and costly pipe line pulsations and makes it unnecessary to shut down the entire system to make repairs to a pump, compressor, etc. Their use eliminates the necessity of closing a manual or mechanically operated valve in the discharge line and the danger of starting up with the discharge valve closed.

The valve consists of only four parts: body seat ring, conical spring and center-guided disc. All are precision machined and parts are fully interchangeable between valves of the same size and pressure rating.

The disc is convex. This reduces restriction and resistance to the flow of the liquid or gas. Also, this shape causes a self-cleaning effect on the closing surfaces washing away particles which might prevent full closure.

The mating surfaces of the disc and seating ring are precision-machined to eliminate irregularities. Couples with the center-guided, non-tilt motion of the disc, a positive, leak-proof closure is ensured.

A specially designed conical-shaped spring controls valve opening and closure and maintains positive tensile action regardless of the degree of compression. Each spring is fabricated of stainless steel so that its properties will not be affected by the material carried though the pipes. The conical spring, when compressed, fits into a recessed area where the disc will not rest on it and cause damage.

The valve body is octagonal, a shape which combines maximum internal area, strength, and light weight. Flanges are an integral part of the body casting.