Lub valve yog ib yam khoom siv nyob rau hauv cov kua dej los tswj cov kev taw qhia, siab, thiab ntws tus nqi ntawm cov kua; Nws ua haujlwm los pib lossis nres qhov ntws ntawm qhov nruab nrab (xws li kua, roj, lossis hmoov) hauv cov kav dej thiab cov khoom siv, thaum tseem tswj hwm nws cov ntim ntim.
Valves ua raws li kev tswj cov khoom hauv cov kav dej xa hluav taws xob. Lawv tau siv los hloov kho tus ntoo khaub lig- ntu ntu ntawm qhov ntws ntws thiab hloov pauv qhov ntws ntawm qhov nruab nrab, ua haujlwm xws li kev taw qhia ntws, kaw -tawm, throttling, rov qab tiv thaiv, kev hloov pauv, lossis kev txo qis. Valves ua haujlwm rau kev tswj cov kua dej-xws li los ntawm qhov yooj yim tshaj plaws kaw- tawm li qub mus rau cov khoom siv hluav taws xob zoo siv hauv cov tshuab tswj tsis siv neeg yooj yim- muaj nyob hauv ntau hom thiab cov lus qhia tshwj xeeb. Lawv cov nominal diameters span ib tug dav spectrum, ncua los ntawm minuscule instrumentation li qub mus rau loj loj industrial pipeline li qub nrog diameters txog li 10 meters. Valves tuaj yeem siv los tswj cov dej ntws ntawm ntau hom kua dej, suav nrog dej, chav dej, roj av, roj av, slurries, corrosive media, kua hlau, thiab cov kua hluav taws xob. Lawv cov kev khiav hauj lwm siab muaj xws li ntawm ultra- theem qis ntawm 0.0013 MPa mus rau ultra- siab siab ntawm 1000 MPa, thaum lawv cov kev khiav hauj lwm kub ntawm qhov kub ntawm qhov kub ntawm -270℃mus rau high-temperature puag ncig mus txog 1430℃.
Kev tswj lub valve tuaj yeem ua tiav los ntawm ntau txoj hauv kev, xws li phau ntawv, hluav taws xob, hydraulic, pneumatic, turbine-tsav, electromagnetic, electro-hydraulic, pneumatic-hydraulic, spur gear-tsav, lossis bevel gear-tsav mechanisms. Valves tuaj yeem tsim kho kom ua haujlwm raws li qhov yuav tsum tau ua ua ntej hauv kev teb rau kev hnov cov cim taw qhia - xws li lub siab, qhov kub thiab txias, lossis lwm yam tsis zoo- lossis lawv tuaj yeem ua haujlwm qhib thiab kaw yooj yim ntawm nws tus kheej ntawm cov teeb liab. Los ntawm kev siv cov txheej txheem kev ua haujlwm lossis kev sib dhos tsis siv neeg, cov li qub ua rau lawv qhib thiab kaw cov ntsiab lus kom ua tiav cov kab nqa tawm, zawv zawg, oscillating, lossis kev txav txav, yog li hloov tus ntoo khaub lig- ntu ntu ntawm cov dej ntws kom ua tiav lawv cov haujlwm tshwj xeeb.