Exploring Different Types of Hydraulic Pumps with Service Exchange Components

What are Hydraulic Pumps?

Many of us, at one time or another, have heard of hydraulics pumps but are not too sure exactly what they are or what they are mostly used for. Hydraulic pumps are marvels of modern science and technology and have helped to revolutionize many different industries, all across the globe.

Essentially, hydraulic pumps are used in various drive systems and can include a number of different types of hydraulic pumps including gear pumps, rotary vane pumps, screw pumps, bent axis pumps, radial piston and axial piston pumps. Hydraulic pumps are generally divided into two main categories; hydrodynamic pumps and hydrostatic pumps. Hydrodynamic pumps are generally described as having a fixed displacement in which the flow cannot be adjusted, or variable displacement in which the flow can be adjusted. Hydrostatic pumps are generally described as having a positive displacement. 

Briefly Exploring Different Types of Hydraulics Pumps

Gear Pumps can consist of internal gear, external gear, gear ring or screw spindle pumps. Gear pumps are typically very economic and easy to operate. Gear pumps have a number of positive and negative aspects and are both popular and unpopular for these reasons. Gear pumps can be very quiet or very loud, depending on the model and type and typically have a limited lifespan due to the gearing system used in them.


Rotary Vane Pumps generally have higher levels of efficiencies when they are compared to gear pumps. Rotary vane pumps however are generally only used in low to mid pressure operations of up to 180 bars. Some key attributes and features of rotary vane pumps include low noise operating levels, wide viscosity ranges, wide variety of speeds and low flow pulsation.

Screw Pumps are fixed displacement pumps featuring two Archimedes screws inside a single chamber. Screw pumps are used when high flows at relatively low pressures are required. One of the main application of screw pumps is aboard ships where they are used to help drive steering gear, control ball valves and so on. These types of pumps have the advantage of low noise but the disadvantage of low levels of efficiency.

There are many other fascinating hydraulic pumps available for a wide variety of jobs and applications, contact Service Exchange Components today to see how they can help you with your hydraulic pump needs.




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