Duplex Metering Pump Having a Single Liquid End

摘要

An improved motor driven duplex metering pump comprising two diaphragms in a single duplex liquid end pump housing assembly. The single duplex liquid end is rigidly attached to a main pump housing at a single mounting position and includes integrated check valves to allow for a single discharge process connection and a single suction process connection. The pump utilizes an improved cam mechanism that creates continuous positive uniform reciprocating motion. That continuous positive uniform reciprocating motion is imparted from its cam mechanism and its follower assembly to drive shafts that are connected to a cross arm and in collectively they impart the same motion to its two diaphragms that reciprocate 180° out of phase from each other. The result is substantially continuous liquid flow rate delivery by the invention.