The NIKKISO Hydroflo® Series 1000 with tubular diaphragm liquid end is a rugged, compact, hydraulically actuated diaphragm metering pump specifically designed for viscous or slurry services. The tubular diaphragm design features a flat PTFE disc diaphragm on the hydraulic side and an elastomeric tubular diaphragm through which the process fluid flows. A wide selection of check valves and hardened materials deliver long lasting performance in even the most abrasive applications. The pump is available in simplex or duplex configuration, with independent capacity adjustment for each pumphead.

All drive parts are fully enclosed and operate in an oil bath which minimizes friction and wear while providing protection from harsh environments. A self-compensating hydraulic system assures diaphragm position and eliminates the need for troublesome vacuum breakers and refill valve.

The easy to read micrometer knob enables convenient capacity adjustment between 0-100% while the pump is operating or stopped. In addition to manual control, the pump can be supplied with optional automatic capacity control, making it possible for the pump to control the flow rate in proportion to various process signals. A simple, externally adjustable, internal hydraulic relief valve protects the pump and the process from pump induced overpressure situations.