Ikulumiswano yelwazi levalvu ye-butterfly

Ngabo-30, iivalvu yevivaneyasungulwa e-United States, yethulwa e-Japan ngeminyaka yabo-50, begodu yasetjenziswa khulu e-Japan ngeminyaka yabo-60, begodu yakhuthazwa e-China ngemva kwabo-70. Njenganje, amavalvu we-butterfly angaphezulu kwe-DN300 mm ephasini sele athatha indawo yamavalvu wesango kancanikancani. Nayiqathaniswa neamavalvu wesango, amavalvu we-butterfly anesikhathi esifitjhani sokuvula nokuvala, i-torque encani yokusebenza, isikhala esincani sokufaka kanye nesisindo esilula. Ukuthatha i-DN1000 njengesibonelo, ivalvu ye-butterfly ingaba yi-2T, begodu i-gate valve ingaba yi-3.5T, begodu i-butterfly valve kulula ukuyihlanganisa namadivayisi ahlukahlukeneko wokutjhayela, ngokuqina okuhle nokuthembeka.

Ububi besivalo serabhaivalvu yevivanekukuthi lokha nayisetjenziselwa ukugandelela, ukuvuvuka kuzokwenzeka ngebanga lokusetjenziswa okungakalungi, okuzokwenza bona isihlalo serabha siphume begodu silimale. Eminyakeni esanda kwedlula, i-China nayo yenze amavalvu we-butterfly avaliweko wensimbi, begodu eminyakeni esanda kwedlula, i-Japan nayo yenze ama-valve we-butterfly amise okwekama amelana nokuvuvuka, ukudlidliza okuphasi nomsindo omncani.

Ipilo yokusebenza yesihlalo sokuvala jikelele yiminyaka eli-15 ukuya kwama-20 yerabha begodu iminyaka ema-80 ukuya kwema-90 yensimbi ngaphasi kweemeko ezijayelekileko. Kodwana, indlela yokukhetha kuhle iya ngeemfuneko zeemeko zokusebenza.

Ubudlelwano phakathi kokuvulwa kweivalvu yevivanebegodu izinga lokugeleza liqondile begodu liyalingana. Nangabe isetjenziselwa ukulawula izinga lokugeleza, ubujamo bayo bokugeleza buhlobene khulu nokujamelana nokugeleza kwamapayipi, njengobubanzi nefomu yamavalvu afakwe emaphayiphini amabili kuyafana, begodu i-coefficient yokulahlekelwa kwepayipi ihlukile, begodu izinga lokugeleza kwevalvu lizokuhluka khulu.

Nangabe ivalvu isebujameni bokugandeleleka okukhulu, umva wepuleti levalvu uthambekele ekubeni mgodi, begodu kungenzeka bona ivalvu ilimale, njeke ivamise ukusetjenziswa ngaphandle kwe-15°.

Lokha i-valve ye-butterfly isekuvulekeni okuphakathi, ijamo lokuvuleka elakhiwe yi-ivalvuumzimba begodu umkhawulo wangaphambili wepuleti yevivane uphakathi kweshafti yevalvu, begodu amahlangothi womabili akha ubujamo obuhlukileko, umphetho wangaphambili wepuleti levivane ngakelinye ihlangothi ukhamba ngendlela yamanzi agelezako, bese kuthi elinye ihlangothi likhambe ngokuphikisana nendlela yamanzi agelezako, ngalokho-ke, umzimba wevalvu ngakelinye ihlangothi begodu ipuleti yevalvu ayivuli ihlangothi elifanako nelinye ihlangothi ukuvuleka okufana nomgodi we-throttle, ihlangothi le-nozzle lirhaba khulu kunehlangothi le-throttle, begodu umfutho ongasimuhle uzokukhiqizwa ngaphasi kwevalvu ye-throttle, begodu isivalo serabha sivamise ukuwa.

I-torque yokusebenza ye-butterfly valve, ngebanga lokuvula okuhlukileko nendlela yokuvula ye-valve, inani layo lihlukile, begodu i-butterfly valve evundlileko, khulukhulu i-valve enobubanzi obukhulu, ngebanga lokujula kwamanzi, i-torque ekhiqizwa mehluko phakathi kwehloko ephezulu nephansi ye-valve shaft angeze yatjhejwa. Ukungezelela, lokha i-elbow nayifakwa ngehlangothini lokungena kwevalvu, ukugeleza kokuphambuka kuyakhiwa, begodu i-torque iyakhuphuka. Lokha ivalvu nayiphakathi, indlela yokusebenza idinga ukuzikhiya ngebanga lokusebenza kwe-torque yokugeleza kwamanzi.