Dosing pumps (metering pumps) can be divided according to different classification methods, mainly including the following types:
Plunger metering pumps: The structure of this metering pump is similar to that of ordinary reciprocating pumps, including key components such as cylinders, plungers, suction and discharge valves, and sealing packing. Plunger metering pumps are suitable for high-pressure and low-flow occasions, especially for conveying liquids containing large particles of impurities.
Hydraulic diaphragm metering pumps: This metering pump has a diaphragm at the front end of the plunger, and transmits pressure through hydraulic oil to push the diaphragm to produce flexural deformation, thereby realizing the delivery and precise metering of liquids. Hydraulic diaphragm metering pumps are suitable for highly corrosive media and have the characteristics of no leakage and corrosion resistance.
Mechanical diaphragm metering pumps: The reciprocating motion of the diaphragm is used to achieve the suction and discharge of liquids. It has the characteristics of no leakage and corrosion resistance and is suitable for conveying corrosive or toxic liquids.
Bellows metering pumps: The volume is adjusted by the deformation of the bellows, and it is suitable for special working conditions, such as high temperature, vacuum and other environments. However, its diaphragm life is short.
Gear metering pump: The volume is adjusted by gear meshing, suitable for conveying high-viscosity liquids, with a simple structure and moderate price.