Pump Solutions Group Neptune Series 500 Specs Industrial - Manual (Page 2)

Neptune Chemical Pump Co.
P.O. Box 247
Lansdale, PA 19446 Phone: 215-699-8700
Fax: 215-699-0370
800 Fax: 800-255-4017
www.neptune1.com
NEPTUNE/CHEMICAL FEED SYSTEM SPEC 10-18-00 jvb ZL107972
2
1. SCOPE
The (contractor/vendor) shall provide (quantity)(completely pre-assembled,
packaged chemical feed system(s)/chemical metering pump(s)) a s
manufactured by Neptune Chemical Pump Company. Package shall be
hydraulically and electrically tested at the factory and shall be assembled to the
fullest extent possible. Package shall be furnished with all required lubricants,
special tools, and installation instructions.
1. PUMP
The chemical metering pump shall be of the hydraulically actuated, high
pressure, diaphragm type, equal to Neptune Series 500 "dia-Pump" capable of
operation against a minimum of (300 psi/enter higher pressure as required).
Pump capacity and materials of construction shall be as shown on the Pump
Data Sheet. Pump shall use a (Teflon disc/Viton tubular) diaphragm.
Pump capacity must be adjustable through 100% of range by (manual
micrometer dial/automatic electric positioner with manual override) while
the pump is running or stopped. The micrometer dial shall have a bright, high
contrast scale easily read in low level light. The micrometer scale shall be
protected with a chemically resistant clear plastic cover. Pump stroking speed
shall not exceed 150 spm. All parts of the power train must operate
submerged in oil.
Pump shall be sized to deliver the required capacity at 85% of maximum stroke
length. Stroke adjustment shall be variable oil by-pass type mechanism with
the plunger powered through its entire travel. Lost motion designs are not
acceptable.
Pump shall include an automatic vent and refill mechanism on the hydraulic
side, which operates once each stroke. The pump shall have an internal
hydraulic relief valve which is externally adjustable.
Double ball check valves shall be provided on both suction and discharge to
insure accurate repeatable metering. The pump valves shall be removable for
cleaning or replacement without the need to disturb suction or discharge
piping.
(Note to Specification Writer: Statement regarding replaceable valves is very
important. The most frequent maintenance operation performed on any
chemical metering pump is valve cleaning and inspection.)