![]() ![]() Used for low pressure application, maximum pressure of 18 to 20 barĮfficiency increases with increasing pressureĮfficiency peaks at best-efficiency-point. Work in high pressure applications, up to 800 bar Key differences between positive and non-positive displacement pumps? Although they provide smooth and continuous flows - their flow output is reduced as the system resistance is increased.Įxamples of non-positive displacement pumps are: They use Newton’s first law of motion to move fluid against the system resistance. What is a non-positive displacement pump?Ī non-positive displacement pump’s output flow rate can change in response to the pressure on the outlet. helical rotor or progressive cavity pumps.Through every cycle of operation, the volume is the same.Įxamples of positive displacement pumps are: The liquid flows into the pump as the cavity on the suction side opens or expands, whilst the liquid flows into the discharge as the cavity closes or decreases. ![]() The pump makes the fluid move by trapping a fixed amount and forcing the volume into the discharge pipe. Learn the difference between a positive and non-positive displacement pump thanks to our team of experts at Global Pumps.Ī positive displacement pump provides a constant flow at fixed speed, regardless of changes in pressure. ![]()
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