To understand what a plunger pump is, you must first decide which category it belongs to. Quite often in everyday life there is a need to mix several components of the solution in a particular ratio. Usually a dosing pump is used for this purpose. It is a hydraulic device that allows you to mix and dose liquid substances. According to the specifics of their work, such pumps are divided into non-volumetric and volumetric. Their difference lies in a special container in which the liquids supplied for mixing are located.
There is such a variety as a plunger pump, which belongs to the volumetric category. According to their specifics of work and structure, such devices are similar to piston ones. The main difference lies in the features of the plunger, that is, a special piston. Heis a metal rod moving in the working chamber of the dosing pump reciprocating, while it does not interact with the walls. The plunger is the main element for the operation of the plunger pump. In this regard, a number of specific requirements are imposed on it: it must be durable, sealed, wear-resistant, ensuring high-quality and reliable operation of the pump. The cost of the device depends on what materials it was made of.
The plunger pump has a specific operation: when the plunger moves to the right side, the pressure in the working compartment is significantly reduced, and the pressure in the suction pipe remains stably high. When a difference in pressure is formed, the suction valve starts to work, with the help of which the liquid moves into the working chamber of the pump. When the plunger moves to the left, the opposite change in pressure occurs, due to which the discharge valve opens, which displaces the liquid from the working chamber.
The plunger pump creates a certain pulsation through this pressure change. This may adversely affect the operation of the device, so the problem should be fixed. You can use several plungers that are connected by a shaft, while they must move cyclically, however, each cycle must differ from the other in the angle and phase of movement. Another option involves the creation of opportunities and conditions for the differential operation of the pump, in which pumpingproduced while the valve is moving in either direction.
Plunger pumps for water work on the same principle as conventional ones. The volume of pumped liquid here depends on what pressure is created inside, that is, the higher it is, the more substance passes. The design features of the devices allow us to divide them into several categories: single and multi-plunger; with or without a heating jacket, with cylinder sealing; with manual or automatic control; horizontal or vertical; single and multi-cylinder. High-pressure plunger pumps are capable of handling different types of fluid and are therefore made from different materials, depending on the fluid used.
