Bawul ɗin ƙwallon lantarki (PID regulating valve) yana da fasali na babban abin dogaro da tsawon rayuwar sabis. Bawul ɗin yana ɗaukar zoben graphite na PTFE da zoben hatimi mai dual-EPDM don haɓaka hatimin bawul, yana ba da ruwa mai gyara unibody don daidaita bambancin matsa lamba. Ayyukan sun haɗa da kwararar kashi daidai, babban ƙarfin rufewa 1.4Mpa, ƙimar aiki PN16, max. bambanci matsa lamba 0.35Mpa, manual actuator short circuit button, da -5°C zuwa 121°C zazzabi aiki. Bawul ɗin yana amfani da ruwa, tururi ko 50% na ruwa glycol.