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Check valve, Pump, Vane pump, Valve, Prelube pump
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VARNA Products EP Oil Pump
The EP pump delivers up to 4 gpm of oil flow. It is a self-priming and quiet-running vane pump. It includes a self-contained, low-pressure loss check valve to prevent backflow. This is particularly valuable in prelube applications to prevent backflow from the main engine lube pump. It can produce up to 100 psi pressure at either 12 or 24vdc.Because these oil pumps do not run at thousands of psi like a hydraulic system, excessive pressure drop caused by small pipes can be detrimental to system performance. Small suction pipes will starve the pump and reduce output flow by causing cavitation. Small pressure pipes will create excessive backpressure that will reduce output flow by slowing down the pump motor. Therefore, elbows and long runs of pipe should be avoided. 4 gpm of cold oil can easily eat up 100 psi when the plumbing is too restrictive.The pump itself does not create pressure. It produces flow. Like a turnstile, every rotation of the pump delivers a metered volume of oil to the other side. Whatever system is connected to the pump has flow resistance that produces backpressure as the pump works to maintain flow.Available pump motor horsepower can develop only a given amount of pressure, in this case about 100psi. The effect of each elbow and each inch of pipe has a cumulative effect. If the plumbing uses up all available pressure there will be no pressure left for the job the pump is intended to do.It is recommended that hose or pipe no smaller than ¾” be used and that the suction hose in particular is kept as short as possible and no longer than 36”. Wiring Considerations
The nominal current draw for the EP-4 pump motor is about 15 amperes. The motor current varies with the viscosity and the pressure required to pump the oil through the system. The colder the oil, the more current the motor draws. The power supply wire should be on a 20 amperes slow blow fuse in order to handle the motor starting current.The EP-4 pump motor is rated for Intermittent Duty. The total accumulated run time during any 15 minute period should not exceed 5 minutes. The maximum run time can be extended if the current draw is less than 15 amperes. For example in a turbo soakback situation when the oil is hot and the pressure requirements are low, the run time can be extended. Application Engineering
It is challenging to address every possible installation type. We are always happy to help in choosing an appropriate installation package. Give us a call for engineering assistance and support. 888-676-7770 Printed in USA 3/14/08 © 2008 VARNA Products
EP-4 Pre-Lube Pump - 40924 Engineer’s Corner
Plumbing ConsiderationsThe EP pump delivers up to 4 gpm of oil flow. It is a self-priming and quiet-running vane pump. It includes a self-contained, low-pressure loss check valve to prevent backflow. This is particularly valuable in prelube applications to prevent backflow from the main engine lube pump. It can produce up to 100 psi pressure at either 12 or 24vdc.Because these oil pumps do not run at thousands of psi like a hydraulic system, excessive pressure drop caused by small pipes can be detrimental to system performance. Small suction pipes will starve the pump and reduce output flow by causing cavitation. Small pressure pipes will create excessive backpressure that will reduce output flow by slowing down the pump motor. Therefore, elbows and long runs of pipe should be avoided. 4 gpm of cold oil can easily eat up 100 psi when the plumbing is too restrictive.The pump itself does not create pressure. It produces flow. Like a turnstile, every rotation of the pump delivers a metered volume of oil to the other side. Whatever system is connected to the pump has flow resistance that produces backpressure as the pump works to maintain flow.Available pump motor horsepower can develop only a given amount of pressure, in this case about 100psi. The effect of each elbow and each inch of pipe has a cumulative effect. If the plumbing uses up all available pressure there will be no pressure left for the job the pump is intended to do.It is recommended that hose or pipe no smaller than ¾” be used and that the suction hose in particular is kept as short as possible and no longer than 36”. Wiring Considerations
The nominal current draw for the EP-4 pump motor is about 15 amperes. The motor current varies with the viscosity and the pressure required to pump the oil through the system. The colder the oil, the more current the motor draws. The power supply wire should be on a 20 amperes slow blow fuse in order to handle the motor starting current.The EP-4 pump motor is rated for Intermittent Duty. The total accumulated run time during any 15 minute period should not exceed 5 minutes. The maximum run time can be extended if the current draw is less than 15 amperes. For example in a turbo soakback situation when the oil is hot and the pressure requirements are low, the run time can be extended. Application Engineering
It is challenging to address every possible installation type. We are always happy to help in choosing an appropriate installation package. Give us a call for engineering assistance and support. 888-676-7770 Printed in USA 3/14/08 © 2008 VARNA Products