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Copyright © 2022 White Knight Fluid Handling | A Graco company
9/14/2022 Version 1.1.8
Page
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187 E. 670 S., Kamas, UT 84036
435.783.6040 888.796.2476
3 Installation
3.1 Installation Precautions
Restriction of Liquid Inlet Line
Restricting the liquid supply of the pump forces the pump to work harder than normal and should be
avoided whenever possible, especially when pumping viscous liquids. Attempting to operate the pump
against a closed liquid inlet will cause serious damage to the pump, and will void the warranty. If you
wish to slow or stop your pump this may be done by closing off the liquid outlet.
Supply Pressure Recommendations
The life of your pump may be extended significantly by operating your pump 30%-40% below redline
operating supply pressures. The use of undersized regulators, valves, and supply lines can decrease
pump performance and longevity significantly.
Orientation
White Knight does not recommend installing your pump in any position other than its upright position.
Check valves within White Knight PSD pumps are actuated by gravity and/or flow and perform optimally
in the upright position.
Failure Potential
It is possible that the diaphragm may fail. In such a situation it is possible that chemical could enter the
air side of the pump, and may even escape through the muffler. In such a situation the muffler media
must be replaced and the air side purged. White Knight recommends the implementation of a one way
valve on the air side to protect air lines from contamination in the event of a diaphragm failure.
Muffler
Pump performance may be restricted in the event of a clogged muffler. Regular inspection of air lines
and muffler media is recommended to maintain performance.
Product Testing
Each pump is tested before being packaged for shipment. White Knight recommends the flushing of
each pump before servicing if water can contaminate the process.
Required Air Flow and Operating Pressure
Required Air Flow for the PSD08 is
1/4” minimum orifice unrestricted. An adaptor is included for ¼”NPT
or ¼” BSPT with all pumps, NPT or BSPT is decided on based on the liquid fittings requested. Max air
supply for the PSD08 is 7 Bar (100 PSI).
