Plunger metering pumps are specialized volume pumps that can meet the needs of various stringent process requirements, primarily used for transferring liquids, especially corrosive ones.

Working Principle

The plunger metering pump directly吸入 and 排出 working medium through the reciprocating motion of the plunger. As the plunger moves inward, the chamber volume decreases, and the liquid is pushed out of the pump body; when the plunger moves outward, the chamber volume increases, and the liquid is吸入 into the pump body. By continuously repeating this reciprocating motion, the plunger pump can continuously deliver liquid.

Features

Flow Regulation: Flow can be infinitely adjusted between 0-99%, maintaining a constant flow rate irrespective of the discharge pressure.

‌Applicable Medium: Suitable for high viscosity mediums, but not for conveying corrosive slurries and hazardous chemicals._‌

Accuracy and Pressure: Measurement accuracy up to ±1%, pressure up to 350 MPa; flow rate remains almost unchanged during pressure variations at the outlet.

‌Material: Stainless steel and PTFE materials are used for parts in direct contact with the medium, suitable for general granular, odorless and tasteless media.

‌Application Fields: Widely used in petrochemical, food, and other industrial sectors._

Structural composition

The plunger metering pump is mainly composed of three parts: the motor, the transmission box, and the cylinder body. The transmission box components include the turbine worm mechanism, the stroke adjustment mechanism, and the crank and connecting rod mechanism; the cylinder body components include the pump head, the suction valve assembly, the discharge valve assembly, the plunger, and the packing seals.

Common Types

Plunger metering pumps come in two main types: valve-equipped pumps and valveless pumps. Valve-equipped pumps control the fluid intake and discharge through the opening and closing of valves, while valveless pumps rely on their unique internal design for fluid measurement and conveyance.