Neptune Series 8000 High-Volume Metering Pumps

The Neptune Series 8000 "dia-Pump" is a hydraulically-actuated high-volume diaphragm pump designed for large-scale metering applications such as regeneration, pretreatment and waste treatment. Both simplex and duplex models are available.

Series 8000 Features :

Suction and discharge valves can be removed for cleaning without disconnecting the piping.
Pumps capacity is adjustable by micrometer dial.
Electric positioners or variable speed drives are available for automatic capacity control.
Capacities to 350 gph simplex; 700 gph duplex. Pressures to 100 psi.
All moving parts of the Series 8000 "dia-PUMP" run submerged in oil for extended service.
Hydraulic flexing and balance of diaphragm eliminates diaphragm stress.
The Series 8000 "dia-PUMP" needs no packing, thereby eliminating packing leakage and the resulting maintenance.

Specifications are given below, or you can download product information for the Series 8000 line (PDF format) here:

Data Sheet (specifications, performance charts & dimensions)

Series 8000 Specifications

Model Number	Materials Of Construction	Type	Strokes Per Minute	Capacity @ (gph)
Model Number	Materials Of Construction	Type	Strokes Per Minute	25 psi	50 psi	100 psi	125 psi	150 psi
8350S-3	316 SS	Simplex	117	350	325	300	295	295
8350S-4	C-20			350	325	300	295	295
8350S-5	PVC			350	325	300	290	280
8350D-3	316 SS	Duplex	117	700	650	600	590	590
8350D-4	C-20			700	650	600	590	590
8350D-5	PVC			700	650	600	580	560

Notes:
Use a 2 HP motor for all pressures.
Piston diameter for all models is 4.25".
Capacities based on water using an 1800 rpm motor.