At Universal Supplies (Clydesdale) Ltd we supply and repair piston pumps throughout the UK. We have been offering this service to our customers for many years allowing us to provide a service which is prompt and affordable. We supply & repair all makes & models including old and obsolete units.
Piston pumps are reciprocating pumps that use piston to move media through a cylindrical chamber. The piston is actuated by a steam powered, pneumatic, hydraulic, or electric drive. Piston pumps are also called well service pumps, high pressure pumps, or high viscosity pumps.
Piston pumps use a cylindrical mechanism to create a reciprocating motion along an axis, which then builds pressure in a cylinder or working barrel to force gas or fluid through the pump. The pressure in the chamber actuates the valves at both the suction and discharge points. Plunger pumps are used in applications that range from 70 – 2070 BAR. Piston pumps are used in lower pressure applications. The volume of the fluid discharged is equal to the area of the piston. The capacity of the piston pumps can be calculated with the area of the piston, the number of pistons, the displacement of the stroke and the speed of the drive. The power from the drive is proportional to the capacity of the pump.
Axial Piston Pumps
An axial piston pump has a number of pistons (usually an odd number) arranged in a circular array within a housing which is commonly referred to as a cylinder block, rotor or barrel. This cylinder block is driven to rotate about its axis of symmetry by an integral shaft that is, more or less, aligned with the pumping pistons (usually parallel but not necessarily)
Internal lubrication of the pump is achieved by use of the operating fluid. Most hydraulic systems have a maximum operating temperature, limited by the fluid of about 120ºC (250ºF) so that using fluid as a lubricant brings its own problems. In this type of pump the leakage from the face between the cylinder housing and the body block is used to cool and lubricate the exterior of the rotating parts. The leakage is then carried off to the reservoir or to the inlet side of the pump again. Hydraulic fluid that has been used is always cooled and passed through micrometre sized filters before recirculating through the pump.
This type of pump can contain most of the necessary circuit controls integrally (the swash-plate angle control) to regulate flow and pressure, be very reliable and allow the rest of the hydraulic system to be very simple and inexpensive.
With a Radial piston pump the working pistons are in radial direction and symmetrically arranged around the drive shaft in contrast to the Axial piston pump. The stroke of each piston is caused by an eccentric drive shaft or an external eccentric tappet (I.E. Stroke ring)
These kind of piston pumps are characterized by the following advantages;
Due to the hydrostatically balanced parts it’s possible to use the pump with various hydraulic fluids like mineral oil, biodegradable oil, HFA (oil in water), HFC (water-glycol), HFD (synthetic ester) or cutting emulsion. That implies the following main applications for a Radial piston pump;
We specialise in urgent breakdowns. We can normally repair a pump within two to five days, this is normally done on a case by case basis. We would be pleased to look at your requirements and quote accordingly.
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