Lub kaw-off valve yog qhov haum, lub hom phiaj yog kom ceev cov raj xa dej tag nrho lossis ib feem ntawm nws raws li cov txheej txheem thev naus laus zis lossis thaum muaj xwm txheej ceev. Nws lub ntsiab kom zoo dua yog ceev, txij li thaum lub ntaus ntawv kaw, lub caij nplooj ntoos hlav yog activated instantly. Lub caij nplooj ntoos hlav them nyiaj yog ua los ntawm kev siv hluav taws xob lossis pneumatic actuator.
Shutoff valve: ntau yam
Hom valve no tuaj yeem muaj lub piston lossis diaphragm pneumatic tsav. Tsis tas li ntawd, lub kaw-off valve tuaj yeem yog ib qho ntawm cov hom: ncaj, lub kaum sab xis, ib qho - lossis ob lub rooj zaum. Raws li txoj kev kaw, hom valve tuaj yeem yog: caij nplooj ntoos hlav, pneumatic, electromagnetic los yog kaw qhov hnyav.
Scope of application
Lub cev ncaj-los ntawm lub cev kaw-tawm valve yog siv rau kev xa cov slurry abrasive los yogtej thaj chaw uas muaj kab mob. Tsis muaj qhov chaw tuag hauv cov cuab yeej zoo li no. Lub kaum sab xis kaw lub valve nrog ob-ua yeeb yam hydraulic piston actuator, siv nyob rau hauv ib puag ncig siab.
Tam sim no, hom fittings no muaj xws li cov qauv tsim uas cov chav ua haujlwm nquag siv los ua qhov nruab nrab hauv nws. Xws li lub valve ua haujlwm hauv 1.5-10 vib nas this. Nws lub tog raj kheej thiab lub cev yog kaw nrog helically qhov txhab gaskets ua los ntawm corrosion-resistant steel nrog ib txheej asbestos. Yog hais tias piv nrog rau sab nraud ib puag ncig, ces qhov nruj ntawm hom li qub no yog qhov siab heev, uas yog yooj yim los ntawm qhov tsis muaj qog nyob hauv lawv. Tag nrho cov no tso cai rau kom muaj kev ntseeg tau zoo thaum lub sijhawm ua haujlwm thiab txhim kho kev ua haujlwm.
Lub kaw-off valve rau dej: qhov sib txawv ntawm qhov hloov tshiab thiab qhov qub
Kev tsim ntawm hom kev txhawb nqa no tau hloov pauv ntau, yog li ob peb qhov sib txawv tseem ceeb tuaj yeem taug qab. Cov yam ntxwv tseem ceeb tshaj plaws hauv kev hloov kho tshiab yog:
- nce kev tiv thaiv rau cov xov xwm tsis zoo;
- nce qib nruj;
- kev ntseeg tau nce mus rau qhov siab kawg;
- ua nrawm tshaj qhov kev hloov pauv qub;
- pipeline tuaj yeem sib tshooj hauv ob qho kev qhia: pem hauv ntej thiab thim rov qab.
hom valve no feem ntau siv rau hauv lub zog, cov ntaub so ntswg thiab ntawv thiab cov khoom noj khoom haus, nrog rau kev kho dej thiab kev kho mob.
Yuav tsum tau kaw lub valve
Basicqhov yuav tsum tau muaj nyob rau hauv cov ntaub ntawv no yog lub teb ceev. Ua raws li qhov no yog ua kom ntseeg tau los ntawm kev teeb tsa lub valve nrog lub caij nplooj ntoos hlav lossis ntau dua. Feem ntau, cov qauv no siv Belleville lossis helical springs. Thaum siv hluav taws xob actuator, qhov tsim ntawm lub valve xav tias muaj cov latches uas tuav lub caij nplooj ntoos hlav hauv lub xeev cocked, thiab lawv tau tswj los ntawm electromagnets. Lub valve tsis siv neeg kaw ua haujlwm tam sim ntawd thiab, yog tias tsim nyog, ib yam li sai sai mus rau hauv hom standby.
Txhua yam ntawm hom valve no tuaj yeem tsim los ntawm cov khoom sib txawv: steel, yas, cam khwb cia hlau lossis stainless hlau.
