Flomatic Corporation has a new patent-pending pump check valve especially designed for use with variable-frequency drive (VFD) controlled submersible pumps.
Standard check valves will “chatter” and be noisy when a VFD goes to low-flow conditions, causing noise, premature wear, and eventual failure. The model 80E VFD and 100E VFD valve is designed to minimize flow losses and hydraulic shocks in the pumping system.
It features an unleaded alloy body available in four sizes: one-, two-, three- and four-inch threaded female NPT connection. A proprietary guided poppet system (stainless steel in two through four inches), ensures that the valve automatically adjusts noiselessly from high to very low flow rates. The radiuses of the valve seat allow a self-cleaning “one-point swiping action” by the radius-edged custom moulded rubber seal disc. Internal parts are made from corrosion-resistant materials and have a durable high-strength design.
The valve can be installed in either horizontal or vertical piping installations.