Ana amfani da bawul ɗin don buɗewa da rufe bututun, sarrafa jagorar kwarara, daidaitawa da sarrafa sigogi na matsakaicin watsawa (zazzabi, matsa lamba da kwarara) kayan haɗin bututun. Dangane da aikinsa, ana iya raba shi zuwa bawul ɗin rufewa, bawul ɗin dubawa, bawul ɗin daidaitawa, da sauransu.

Bawul shine sashin sarrafawa a cikin tsarin jigilar ruwa, wanda ke da ayyuka na yanke-kashe, ƙa'ida, jujjuyawar, hanawa na yau da kullun, daidaitawar matsin lamba, jujjuyawar ko zubar da ruwa, da sauransu.

Ana iya amfani da bawuloli don sarrafa kwararar iska, ruwa, tururi, kafofin watsa labarai masu lalata, laka, mai, ƙarfe na ruwa da kafofin watsa labarai na rediyo da sauran nau'ikan ruwa. Bawuloli bisa ga kayan kuma an raba su zuwa simintin ƙarfe na ƙarfe, bawul ɗin ƙarfe na ƙarfe, bawul ɗin bakin karfe (201, 304, 316, da sauransu), chromium molybdenum karfe bawuloli, chromium molybdenum vanadium karfe bawuloli, bawuloli na karfe biyu-lokaci, bawuloli na filastik, bawuloli na al'ada mara kyau.

Valve yana cikin tsarin ruwa, ana amfani dashi don sarrafa jagorancin ruwa, matsa lamba, kwarara na na'urar, shine sanya bututu da kayan aiki a cikin matsakaici (ruwa, gas, foda) gudana ko tsayawa da sarrafa kwararar na'urar.

Bawul shine sashin kula da tsarin isar da ruwan bututun mai, ana amfani dashi don canza sashin nassi da matsakaicin matsakaiciyar kwarara, tare da karkatarwa, yankewa, magudanar ruwa, dubawa, karkatarwa ko ayyukan taimako na matsin lamba. Valve da ake amfani da shi don sarrafa ruwa, daga mafi sauƙaƙan bawul ɗin duniya zuwa tsarin sarrafawa ta atomatik mai rikitarwa da ake amfani da shi a cikin nau'ikan bawuloli, iri-iri da ƙayyadaddun bayanai, girman ƙimar bawul ɗin daga ƙaramin bawul ɗin kayan aiki zuwa girman bawul ɗin bututun masana'antu har zuwa 10m. Za a iya amfani da su sarrafa ruwa, tururi, man fetur, gas, laka, da dama m kafofin watsa labarai, ruwa karfe da rediyoaktif ruwa da sauran iri ruwa kwarara, da aiki matsa lamba na bawul iya zama daga 0.0013MPa zuwa 1000MPa na matsananci-high matsa lamba, da aiki zafin jiki na iya zama C-270 ℃ na matsananci-low zazzabi zuwa 14.

Ana iya sarrafa bawul ɗin ta hanyoyi daban-daban na watsawa, kamar manual, lantarki, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic, electro-hydraulic, electro-hydraulic, gas-hydraulic, spur gear, bevel gear drive; A cikin matsa lamba, zafin jiki ko wani nau'i a ƙarƙashin aikin siginar firikwensin, aiki, bisa ga buƙatun ajiyar ko ba a dogara da siginar firikwensin don buɗewa mai sauƙi ko rufewa ba, dogara ga drive ko injin atomatik yana buɗewa da rufe bawul don ɗagawa, zamewa, wuri ko juyawa motsi, don canza girman tashar jiragen ruwa don gane aikin sarrafawa.