Demystifying Positive Displacement Pumps: Types, Functions and Benefits
Positive displacement pumps, the workhorses of fluid transfer, come in a range of types, each designed for specific applications. In this blog post, we will delve into the world of positive displacement pumps, exploring their diverse types, functions and advantages.?
Rotary Pumps: Rotary pumps are known for their continuous rotary motion. The most common rotary types include gear, vane and lobe pumps. Gear pumps consist of two meshing gears that trap and transfer fluid between the gear teeth and pump casing. Vane pumps employ rotating vanes that slide in and out of slots, creating chambers to capture and displace fluid. Lobe pumps utilize rotating lobes to move fluid between the lobes and the pump casing. This design can run speeds in the 1000 RPM range and have a low Net Inlet Pressure Required (NIPR) value. Rotary pumps output is a sine wave due to the varying displacement output of the design. ?
External Circumferential Piston (ECP) Pumps: ECP pumps are like rotary pumps in that their continuous rotary piston motion create an inlet suction and discharge output flow.? This design makes for a constant and accurate displacement output with thin to viscous products. This design has, long internal sip paths, low NIPR requirements, accurate output flow, while handling soft particulates very well. These pumps are used in food and beverage and chemical applications.?
We have four additional positive displacement pump types to explore on our website: Reciprocating?pumps, Progressive Cavity Pumps, Peristaltic Pumps and Twin Screw Pumps.
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