V1.4 7 of 22 04/01/2009
Strainer Protection
Strainers are used to remove contaminated particles from the fluid system and extend
pump life. Every pump should be protected from these particles by a strainer in the
suction line.
Strainer size and mesh of screen are determined by the rate of flow and viscosity of the
fluid. Consult the strainer manufacturer for recommendations.
Never use a strainer with a built-in automatic by-pass on the suction line set to open
under 30" Hg. vacuum.
Install the strainer according to the designated direction of flow, locating it so that it is
accessible for servicing. Use a duplex type strainer when shutdown during service is not
possible.
Provide a vacuum gauge in the suction line for determining when the strainer requires
cleaning. Make certain strainer baskets are properly reinforced so as not to collapse
under 30" Hg. vacuum.
WARNING!
All Tuthill pumps contain residual 200 SSU lube oil from the factory test. Determine if this is
compatible with the fluid you are pumping. If the fluid is incompatible, consult the factory.
If the pump is to operate at elevated temperatures, it should be brought up to operating
temperature gradually. Rapid or sudden introduction of liquid at an elevated temperature
into the cold liquid chamber of the pump could cause damage to the seal or other internal
parts.
Do not run the pump dry. This could cause severe damage to the seal, bushings and/or
metal parts.
Startup
Prior to starting the pump double check the following:
• Pressure and vacuum gauges should be installed as close as possible to the
pump.
• Rotate pump shaft to ensure it turns freely without binding.
• Recheck alignment and ensure all guards are in place.
• Make sure piping is independently supported and no strain is being transmitted to
the pump.
• Make sure the safety relief valve is installed correctly.
• Check pump rotation.
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