Operat ion and Maintenance M a n u a l
QTS Series Twin Screw Positive Displacement Pump
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Ampco Pumps Company QTS Manual M-030 Rev A 1.16
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PU MP OPERATION
Follow these steps for the proper operation of your pump before, during, and after start up.
Remember that the correct operation of the pump ensures proper performance and long service
life. Failure to follow these recommendations could result in damage to the pump voiding the
warranty.
Start Up Procedure
Before starting the equipment, ensure the following:
• Ensure oil is filled to the center of the top sight glass. Mechanical seals are not leaking.
Double mechanical seals must be lubricated, without exception. The pump is able to run
dry for a short period of time (not recommended). Prevent dry starts to avoid damaging the
mechanical seals.
• Jackets are properly connected and have adequate supply of heating or cooling medium.
• The pump is cleaned and sterilized.
• The pump is primed with the fluid to be pumped.
• In order to prevent cavitation, check the valves confirming the suction side is fully open.
• The valves on the discharge side are fully open to prevent overpressure inside the pump.
• Safety measures are taken at the discharge side of the pump to protect against
overpressure (open valves, corresponding jacketed piping, by-pass, and recirculation or
pressure relief valves).
• The manometers at the discharge are operational.
When starting the motor, check and adjust the operating speed according to the data sheet, after
the motor reaches the operation speed search for leaks.
Shut - Down Procedure
After shutting down the motor check the following:
• The pump decelerates gradually. If a variable frequency drive is used both acceleration
and deceleration ramps can be programed.
• If the pump has a double mechanical seal even when the pump is stopped continue the
supply of the buffer fluid until it is depressurized.
• If a jacket is used adjust it until the pump temperature drops below 100 °C/212 °F.
Restart Procedure
Before restarting the pump check the smooth rotation of the shafts without restrictions and repeat
the startup procedure.
