NEPTUNE 535-D-N1 PUMP, METERING _36GPH _600PSI* DUPLX CAST IRON HEAD, TFE DIAPHRAGM, --Discontinued! click for info--
NEPTUNE PUMP DRIVE 500-D DUPLEX: This Neptune diaphragm metering pump drive has a robust motor-driven gear-reduction and hydraulically actuated disc diaphragms. Features two manual stroke length adjust knobs for this duplex head pump. Stroke frequency can be fixed or variable.