*Neptune Pump Note: 350 psi maximum discharge pressure is only available using optional -FA (or -FALP) AND 1.0 HP motors. Only 250 psi maximum is available using optional -FA (or -FALP) AND .75 HP motors. Only 175 psi maximum is available using .50 HP motors. See Motor? options or Product Category = Motors electric for more motor choices.
**Note: With Motor Option "-FA" or "-FALP", the pump and motor are bought as separate Shopping Cart items but are mounted together when shipped. After adding the pump to the Shopping Cart, go to Product Category = Motors electric to purchase a motor, or contact us for any special motor you require.
NEPTUNE PUMP DRIVE 500-S SIMPLEX: This Neptune diaphragm metering pump drive has a robust motor-driven gear-reduction and hydraulically actuated disc diaphragm. Features one manual stroke length adjust knob on this simplex head. Can be field-converted to a 500-D duplex head. Stroke frequency can be fixed or variable.
