Ama-motor valves afakwe ngaphakathi kwamamitha wegesi. Ngokuvamile, kunezinhlobo ezintathu zamamitha egesi yasendlini: 1. i-valve yokuvala ukuvala ngokushesha; 2. i-valve evamile yokuvala igesi; 3. i-valve yebhola le-motor. Ukwengeza, uma imitha yegesi yezimboni idinga ukulungiswa, i-valve yemitha yegesi yezimboni iyadingeka.

Nazi izici zabo kanye nomehluko:

Ivalvu yokuvala evala ngokushesha ingavalwa khona manjalo, ngakho-ke iqanjwe ngesivinini sayo esisheshayo uma ivala. Le valve yokuvala igesi inesakhiwo sokushayela igiya ne-rack futhi ikwazi ukuzivumelanisa ne-G1.6-G4 gas metres. Ngaphezu kwalokho, ingangezwa ngokushintsha oku-1 (noma okungu-2) kokuphela (ukudlulisa amasignali avuliwe/avaliwe endaweni).

I-valve yokuvala evamile incane uma iqhathaniswa ne-valve yokuvala evala ngokushesha, ngakho ayikwazi ukungezwa ngokushintsha kokuphela. Le valvu Ivalvu yokuvala isikulufu, futhi iyasebenza kumamitha wegesi we-G1.6-G4.

I-valve yebhola yemitha yegesi ingasetshenziswa ngezinga eliphezulu lokugeleza. Kuyivalvu yebhola yokushayela igiya futhi ikwazi ukuzivumelanisa nezinga elibanzi lokugeleza kwemitha yegesi, ukusuka ku-G1.6 kuya ku-G6. Ingengezwa ngokushintsha kokuphela oku-1 noma oku-2 futhi. Ngaphezu kwalokho, ukwakheka kwayo kwenza ikwazi ukudlula ukuhlolwa kothuli.

I-valve yokuvala izimboni ingasetshenziswa kumamitha wegesi anesilinganiso sokugeleza esiphezulu kakhulu. I-valve ye-industrial motor inesakhiwo sokushayela isikulufu, futhi sisebenza kumamitha wegesi we-G6-G25. Lolu hlobo lwe-valve lungabuye lwengezwe ngokushintsha oku-1 noma oku-2 kokuphela.

Wonke lawa mavalvu amamitha egesi angasetshenziswa kugesi yemvelo kanye ne-LPG futhi. Amanye alawa ma-valve enjini angenziwa abe ama-valve angaphandle, ngakho ububanzi bokusebenza kwawo bubanzi ngokwanele, banele ukusetshenziswa kwegesi yansuku zonke.