The working pressure of high pressure plunger pump should be between 10 MPa and 100 MPa. It belongs to the positive displacement pump, which depends on the periodic change of the volume in the working chamber to achieve the purpose of conveying liquid; the mechanical energy of the prime mover is directly converted into the pressure energy of conveying liquid through the pump; the capacity of the pump only depends on the change value of the volume of the working chamber and the number of changes in unit time, and has nothing to do with the discharge pressure theoretically. The reciprocating pump changes the volume of the working chamber periodically through the reciprocating movement of the piston in the working chamber of the hydraulic cylinder (or the periodic elastic deformation of the flexible elements such as the barrier and bellows in the working chamber). In structure, the working chamber of reciprocating pump is separated from the outside through sealing equipment, and connected or closed with pipeline through pump valve (suction valve and discharge valve). High pressure reciprocating pump is a widely used reciprocating pump. It is mainly used in petroleum, chemical industry, chemical fertilizer industry, oil field and salt mine as water injection pump, construction, shipbuilding, chemical industry, steel pipe, pressure vessel as pressure test pump, booster pump, etc. Such a wide range of applications is mainly due to its functional characteristics.
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