Valavu yokhazikika yachitsulo Ili ndi dzenje pakati pa pulagi motsatira mzere wake. Mphepete iyi imatsekedwa pansi ndipo imayikidwa cholumikizira cholumikizira pamwamba. Cholumikizira chimayikidwa m'dzenjemo, ndipo valavu yowunikira pansi pa cholumikizira cholumikizira imaletsa cholumikizira kuti chisayende mobwerera m'mbuyo. Cholumikizira chimatuluka kuchokera pakati pa dzenjelo kudzera m'mabowo a radial kupita ku mipata yamafuta yomwe imatambalala kutalika kwa malo okhala pulagi.

Pofuna kuchepetsa mphamvu ya ma valve a pulagi opangidwa ndi mipando yachitsulo,Valavu yokhazikika yachitsuloapangidwa ndikugwiritsidwa ntchito kwambiri. Kuwonjezera pa makhalidwe a ma valve a pulagi opangidwa ndi mafuta wamba, ma valve a pulagi ogwirizana ndi kupanikizika ali ndi makhalidwe awa:

• 1. Pamene valavu yatsegulidwa, kupanikizika m'chipinda chapansi cha thupi la valavu kumayenderana ndi kupsinjika kwapakati mu payipi. Mafuta otsekera opanikizika kwambiri m'chipinda chapamwamba amachititsa kuti thupi la pulagi likankhidwe pansi, ndipo mpata pang'ono umawonekera pakati pa phula ndi pamwamba pa thupi la valavu, mphamvu ya thupi la pulagi yozungulira imachepa bwino.
• 2. Mu nyengo yotentha kwambiri, kufalikira kwa kutentha kwa pulagi kumatha kuyamwa ndi kukwera ndi kugwa kwake. Valvu ya pulagi yopaka mafuta, ngakhale kugwiritsa ntchito mafuta opaka mafuta kungachepetse mphamvu yotsegulira ndi kutseka, koma kungayambitse kuipitsidwa kwa sing'anga. Chifukwa chake, mafuta otsekedwa amasankhidwa kuti agwirizane ndi momwe amagwirira ntchito.