Iyi valve ikoreshwa mugukingura inleti ya hydraulic (Valve isanzwe ifunze).
Iyo isuka imaze gukoreshwa muburyo bwo gutembera ni ubusa kuva kuri P kugeza kuri A. Irashobora gukoreshwa cyane cyane:
a) gushiraho urutonde rwibikorwa 2
b) nk'impera ya valve ya stroke, aho imigezi ihujwe na tank.