Plunger and piston pumps are countering pumps that make use of pistons or plungers in order to move a medium through a cylindrical place. The piston or plunger is activated by a pneumatic, steam, electric drive or hydraulic.
Plunger pumps and rotary piston use an eccentric mechanism for creating reciprocating motions along the axis that generate pressure into the cylinder or in the working barrel in forcing fluid or gas through the plunger. Now, the force in the cylindrical chamber triggers the regulators at both discharge points as well as suction. It is used in many applications that range from seventy to 2,070 bars with 1,000 – 30,000 PSI. Thus, pistons are used for lower applications than plunger pumps.
Generally, the volume of the gas or fluid discharged is equivalent to the total site of the piston or plunger, multiplied by the plunger’s stroke length. The plunger pump’s overall capacity is calculated using the stroke length, place of the plunger, speed of the drive as well as the quantity of plungers. Power that is required from the drive is equal to the capacity and pressure of the plunger.
Seal is an essential part of plunger pumps in order to divide the power gas or fluid to the media that are likely pumped. Packing or stuffing boxes are used in sealing the joint in between of the vessels where it is transported and the pumps. Packing may consist of seal or packing rings, bushings and glands. The materials include brass, bronze, stainless steel, steel, nickel alloy, iron or any kind of material.
Plunger pumps that are used in oil service or general service applications commonly have a plunger and iron cylinders. The suction, discharge valves as well as plunger pump come in touch with media transferred type and choices of material are based on the transferred fluid. In most applications where power is necessary, constant duty plunger pumps are required together with solid plungers that can be used when in contact with oil or water.
The power needed to drive plunger pumps is straightforward. It is proportional to the capacity and pressure. Plunger pumps operate with the principle that the equal fluid volume is displaced with a solid one containing the same volume. Once the plunger pumps reach its highest travel point, the hydraulic cycle is now complete. When plunger pumps move from its high position, it develops positive pressure with the pressure in the suction valve. It then raises the discharge valve and allows the fluid or gas to flow out of the plunger pump.