Valve ya pulagi ndi valavu yozungulira yofanana ndi kutseka kapena plunger. Pambuyo pozungulira madigiri a 90, njira yotsegula pa pulagi ya valve ndi yofanana kapena yolekanitsidwa ndi njira yotsegula pa thupi la valve kuti amalize kutsegula kapena kutseka. Amagwiritsidwa ntchito kwambiri pofukula mafuta, zoyendetsa ndi zoyenga, ndipo ma valve oterowo amafunikiranso muzomera zosakaniza phula.

Pulagi ya valavu ya pulagi ya pulagi mu chosakaniza cha asphalt ikhoza kukhala cylindrical kapena conical. Mu pulagi ya cylindrical valve, njirayo imakhala yamakona anayi; mu conical valve plug, njirayo ndi trapezoidal. Mawonekedwewa amapangitsa kapangidwe ka valavu ya pulagi kukhala kuwala komanso koyenera kwambiri kutsekereza ndi kulumikiza media ndi kusokoneza.
Popeza kusuntha pakati pa malo osindikizira a valavu ya pulagi kumakhala ndi zotsatira zowonongeka, ndipo pamene kutsegulidwa kwathunthu, kungathe kupeŵa kukhudzana ndi sing'anga yosuntha, kotero kuti nthawi zambiri ingagwiritsidwe ntchito pa TV ndi particles zoimitsidwa. 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, zomwe zitha kupangitsa kuyika kwa mapaipi kukhala kosavuta. , kuchepetsa kuchuluka kwa ma valve ndi zipangizo zina zolumikizira zofunika pazida.
Valve ya pulagi ya zomera zosakaniza za asphalt ndi yoyenera kugwira ntchito pafupipafupi chifukwa cha kutsegula ndi kutseka kwachangu komanso kosavuta. Ilinso ndi ubwino wa kukana kwamadzimadzi ang'onoang'ono, mawonekedwe osavuta, kukula kochepa, kulemera kochepa, kukonza kosavuta, kusindikiza bwino, kusagwedezeka, ndi phokoso lochepa.
Pamene valavu ya pulagi imagwiritsidwa ntchito muzitsulo zosakaniza za asphalt, sizidzakakamizidwa ndi chitsogozo cha chipangizocho, ndipo kayendetsedwe ka kayendedwe ka sing'anga kungakhale kalikonse, komwe kumalimbikitsanso kugwiritsa ntchito zipangizozo. M'malo mwake, kuphatikiza pazigawo zomwe tafotokozazi, valavu ya pulagi imatha kugwiritsidwanso ntchito kwambiri mu petrochemical, mankhwala, gasi wamakala, gasi wachilengedwe, gasi wamafuta amafuta, ntchito za HVAC ndi mafakitale wamba.