Vavu ya pulagi mu siteshoni yosakaniza phula ndi chidutswa chotsekedwa kapena valavu yozungulira yozungulira ngati plunger. Pozungulira madigiri a 90, doko lachitsulo pa pulagi ya valve ndilofanana kapena lolekanitsidwa ndi doko lachitsulo pa thupi la valve kuti litsegule kapena kutseka. Amagwiritsidwa ntchito kwambiri. Pofukula munda wamafuta, zida zoyendetsa ndi zoyenga, ma valve otere amafunikiranso muzomera zosakaniza phula.

Mawonekedwe a pulagi a pulagi valavu mu siteshoni asphalt kusakaniza akhoza kukhala cylindrical kapena conical. Mu pulagi ya valavu ya cylindrical, njirayo imakhala yamakona anayi; mu conical valve plug, njirayo ndi trapezoidal. Mawonekedwewa amapangitsa kapangidwe ka valavu ya pulagi kukhala kuwala, komwe kuli koyenera kwambiri kutsekereza ndi kulumikiza sing'anga ndikupatutsa kutuluka.
Popeza kusuntha pakati pa malo osindikizira a valavu ya pulagi kumakhala ndi zotsatira zowonongeka, ndipo kungathe kupeŵa kukhudzana ndi sing'anga yosuntha pamene kutsegulidwa kwathunthu, kumatha kugwiritsidwanso ntchito pa TV ndi particles zoyimitsidwa. Kuphatikiza apo, chinthu china chofunikira cha valavu ya pulagi ndikuti ndichosavuta kusinthira kumayendedwe amitundu yambiri, kotero kuti valavu imodzi imatha kupeza njira ziwiri, zitatu, kapena zinayi zosiyana, zomwe zitha kupangitsa kuti dongosolo la mapaipi likhale losavuta. ndi kuchepetsa kuchuluka kwa ma valves Komanso zipangizo zina zolumikizira zofunika pazida.
Valve ya pulagi ya chomera chosakaniza phula ndi yoyenera kugwira ntchito pafupipafupi chifukwa ndi yofulumira komanso yosavuta kutsegula ndi kutseka. Imawonetsanso kukana kwamadzimadzi otsika, mawonekedwe osavuta, kukula kochepa, kulemera kopepuka, kukonza kosavuta, kusindikiza kwabwino, komanso kusagwedezeka. , phokoso lochepa ndi ubwino wina.
Pamene valavu ya pulagi imagwiritsidwa ntchito muzitsulo zosakaniza za asphalt, sizimaletsedwa ndi njira yokhazikitsira, ndipo kayendetsedwe ka kayendedwe ka sing'anga kungakhale kalikonse, komwe kumalimbikitsanso kugwiritsa ntchito zipangizo. Kuphatikiza apo, itha kugwiritsidwanso ntchito kwambiri m'makampani a petrochemical, makampani opanga mankhwala, gasi, gasi, gasi wamafuta amafuta, mafakitale a HVAC ndi mafakitale wamba.