Generally, the metering pump is a kind of reciprocating pump which can adjust output ow proportionally, also called as quantitative pump orproportional pump. mainly used for accurate metering and dosing of chemicals, Stnreland's metering pump has a uniqgue technical advantages, morematerial options and professional customized solutions, lt can meet the needs of chemical addition and process requirement in diferent application.and is widely used in petrochemical, chemical and petroleum natural & gas.

in the proces, usually rely on cene glycolsport a varicty of fluid. For small flow, with high head application only multi-stagcentriugal pump can reach high-sped partial fow pump to achieve high output pressure, but the efliciency is low. High-pressure reciprocatingplunger pump and reciprocating diaphragm pump can achieve very high efficiency, Especially, the reciprocating diaphragm pump has thetharacteristics of no leakage in the high-pressure dangerous liquid transport field, has a unique technical advantages.

According to the reguirements of the proces, there are axial ow type, radial flow type, mised flow type single luo belt type, double luo belt typemulti-layer paddle blade and so on. The installation method has top, side-in and bottom-in.