PVP4836R2M11

Use of a Relief Valve
The use of a relief valve, while not mandatory is
recommended in the main circuit to suppress
hydraulic shock loads and adds additional
system protection.
Fluid Recommendations
Premium quality hydraulic oil with a viscosity range
between 150-250 SSU (30-50 cst.) at 38°C (100°F).
Normal operating viscosity range between 80-1000
SSU (17-180 cst.). Maximum start-up viscosity is
4000 SSU (1000 cst.).
NOTE: Consult Parker when exceeding 71°C (160°F)
Inlet Fluid Temperatures. Oil should
have maximum anti-wear properties, rust and
oxidation treatment.
Filtration
For maximum pump and system component life,
the system should be protected from contamination
at a level not to exceed 125 particles greater than
10 microns per milliliter of fluid. (SAE Class 4/ISO
16/13.) Due to the nature of variable displacement
pumps, variations in pump inlet conditions, fluid
acceleration losses, system aeration, and duty cycle
we do not recommend suction line filters. We do
recommend the use of a properly sized, in-tank,
suction strainer. Contact your Parker representative
for assistance.
Start-Up
On initial start-up, the case should be filled with oil,
pressure adjustments should be reduced and the
circuit should be open to permit priming.
Inlet Conditions
Not to exceed .17 bar (5 In. Hg.) Vacuum at 1800
RPM on petroleum base fluids. See recommended
speed spectrum for specific inlet conditions.
Shaft Rotation and Line Up
Pump and motor shaft alignment must be within
.010 TIR maximum, using a standard floating
coupling. Please follow coupling manufacturer’s
recommended installation instructions to prevent end
thrust on pump shaft. Turn pump to assure freedom
of rotation. Pump and motor must be on a rigid base.
The coupling should be sized to absorb the peak
horsepower developed.
Installation and Mounting
When mounting a PVP Series Pump, the “case
drain” must be on top of the pump. The “case drain”
should be a separate line unrestricted to the reservoir
and extend below the oil level as far from the inlet
line
as possible. The “case drain” line must not exceed
.7 bar (10 PSI) back pressure. Suggested maximum
line length is 10 feet.
Special Installations
Consult your Parker representative for any
application requiring the following:
Pressure above rated, drive speed above maximum,
indirect drive, fluid other than petroleum oil, oil
temperature above 71°C (160°F).
Inlet Pressure