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Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
First Choice When Quality Matters
NORTH
AMERICA
General Safety Information
(continued)
Maximum water temperature is
140°F.
All positive displacement plunger
pumps must have a safety relief valve
installed on the discharge side of the
pump, this valve could be either an
unloader or regulator and must be of
adequate flow and pressure for the
pump.
Adequate protective guards must
cover all moving parts. Perform
routine maintenance on the pump and
components.
Use only components that are rated
for the flow and pressure of the pump,
this would include hose, fittings, safety
valves, spray guns etc.
Electric Drive Pumps
Your power supply must conform to the
system requirements.
The motor must be grounded. Use
GFCI plugs and receivers.
Do not handle the pump/motor with
wet hands.
Only use power cords that are in
good condition.
Never pull the unit by the power
cord.
Never spray or clean the unit with water
Failure to follow these warnings
may result in personal injury or
damage to property.
Special Features
Wet End
Manifold: Forged Brass: Strength
and no porosity – long life. higher
hydrostatic pressures – safety,
performance.
Inlet and Discharge Ports: Heavy
bosses for added strength. Offset
Discharge Ports: High efficiency,
smooth flow. Bolts: Eight bolts, 8mm,
grade 8.8.
Valves: Valve Caps: Stainless steel on
pumps rated at 3200 PSI and higher,
better hydrostatic loads. Machined
brass on pumps <3200 PSI. Ultra Form
Cages: Durable, strength, and long life.
Poppets, Seat and Spring: 303 and 400
series stainless steel.
Packing and Plungers: High Pressure
Packing: “V” style (D-1) Buna-N (cotton
duct weave base) strong and tightens
under load. Low Pressure Seals: “U”
cup double lip Buna-N for a good
positive seat. Support and Guides:
Machined brass, 1-piece construction
to assure proper plunger alignment
and to maximize packing and seal life.
Plungers: Are a special aluminum oxide
blend, solid ceramic for long life, strong
durability and more resilient.
Drive End
Bearings: Oversized tapered roller
bearing for maximum life and load
disbursement.
Bearing Support: Precision die-cast
and machined to assure concentricity
and alignment.