Metering famfo ne musamman don auna da kuma jigilar ruwa. Mafi auna famfo amfani da piston famfo, membrane famfo(Duba reciprocating famfo)Da tsarin famfo na gear, saboda za su iya kiyaye kwararar kwarara ba tare da matsin lamba na fitarwa ba. Ma'aunin famfo yana da nau'ikan biyu na daidaitaccen kwarara da mara daidaitaccen kwarara, wanda ya fi dacewa.

Abubuwan amfani na metering pumpAna daidaitawa ne ta hanyar canza tsawon tafiya, misali canza radius na rukuni, matsayin dakatar da lokacin da piston ya dawo, da kuma rata a cikin haɗin tsakanin piston da gicciye. Hakanan ana iya daidaita gudun gudun ta hanyar canza yawan juyawa ko amfani da hanyoyin biyu a lokaci guda. Kodayake tsawon tafiya za a iya daidaitawa daga sifili zuwa mafi girma, don tabbatar da daidaiton ma'auni, gabaɗaya an iyakance shi zuwa30 ~ 100%.

Abubuwan amfani na metering pumpYana da guda silinda guda aiki reciprocating famfo, da gudu matsin lamba ne mafi girma pulse rate. Don kawar da bugun jini, ƙara kwanciyar hankali na matsin lamba na kwarara, rage girgizar bututun da tasirin tasiri a kan aikin aiki, gabaɗaya ana ba da shawarar shigar da accumulator tare da aikin rage bugun jini a filin fitar da famfo mai juyawa. Wani lokaci, don inganta aikin numfashi na ƙofar numfashi, an kuma shigar da accumulator a ƙofar. Daga hangen nesa na rage bugun jini, girman accumulator ba shakka mafi girma mafi kyau, amma mafi girma mafi ƙarancin tattalin arziki, don haka ya kamata a sarrafa shi a cikin wani kewayon. Abubuwan da aka zaɓa na metering famfo accumulator yawanci kamar yadda ke ƙasa:(mililitar)Ƙara26Za a iya samun rage90%Minimum girman da ake bukata pulse damper don pulsation(mililitar).

Abubuwan da aka fi amfani da su bisa ga tsarin na'ura mai amfani da ruwa karshen, za a iya raba metering famfo zuwa piston-irin metering famfo da membrane-irin metering famfo. Daga cikinsu, piston nau'in ma'auni famfo raba zuwa yau da kullun da bawul famfo da kuma ba bawul famfo. Diaphragm metering famfo raba zuwa inji diaphragm metering famfo, na'ura mai aiki da karfin ruwa diaphragm metering famfo, da kuma corrugated bututun metering famfo. Ana iya rarraba metering famfo bisa ga siffar tuki zuwa electromagnetic tuki metering famfo da inji tuki metering famfo. Bugu da ƙari, akwai ma'auni famfo ta amfani da karfin ruwa tuki, pneumatic tuki da sauran tuki nau'i.