At USC Universal Supplies Ltd we provide high quality piston pumps and repairs to clients across the UK at competitive prices.
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.
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.
Very high load at lowest speed due to the hydrostatically balanced parts possible.
No axial internal forces at the drive shaft bearing.