The pump’s flow rate and accuracy aren’t affected by voltage fluctuations; the unit operates at any single-phase voltage from 94 to 264 Vac.

The PZ pumps come in manual control, external input, and programmable models, in a wide range of sizes and pressures (from 1 to 1,300 ml/min at pressures up to 220 psi). Models PZD-32/52 and all PZiG Models have built-in calibration and allow accurate direct entry of feed rate in ml/min. All models have onboard control features, including pH and residual chlorine control – without requiring a separate PID controller. An available flow checker measures flow on the smaller models.

Neptune Chemical Pump Co. Inc., Box 247, Lansdale, PA 19446, (215) 699-8700,

Metering Pumps