Displacement pumps can be broadly classified into two main categories:
1. Reciprocating Pumps
Reciprocating pumps use a back-and-forth (reciprocating) motion of pistons, plungers, or diaphragms to move fluid. They are known for their high-pressure capabilities and precise flow control.
Common Types of Reciprocating Pumps:
Piston Pumps – Use a piston moving inside a cylinder to draw in and expel fluid.
Plunger Pumps – Similar to piston pumps but use a plunger for higher pressure applications.
Diaphragm Pumps – Utilize a flexible diaphragm to displace fluid, making them suitable for handling corrosive or abrasive liquids.
2. Rotary Pumps
Rotary pumps use rotating mechanisms (gears, screws, lobes, or vanes) to trap and move fluid. They provide a smooth, continuous flow and are commonly used for viscous fluids.
Common Types of Rotary Pumps:
Gear Pumps – Use intermeshing gears to transfer fluid (external or internal gear designs).
Lobe Pumps – Feature rotating lobes that move fluid with minimal shear, ideal for food and pharmaceutical industries.
Screw Pumps – Utilize one or more screws to move fluid axially, commonly used in high-viscosity oil applications.
Vane Pumps – Use sliding vanes in a rotor to create displacement, suitable for low-to-medium viscosity fluids.
Post time: May-07-2025