1. Ngokokukhethwa kwemisebenzi yokulawula, iivalve ezahlukeneyo zinemisebenzi yazo, kwaye ingqalelo kufuneka ihlawulwe kwimisebenzi ehambelana nayo xa ukhetha.

2. Ngokokukhethwa kweemeko zokusebenza, iiparitha zobugcisa ezisetyenziswa ngokuqhelekileyoIvalve yeBhola yobheduzibandakanya uxinzelelo lwesikali sokusebenza, uxinzelelo oluphezulu oluvumelekileyo lokusebenza, ubushushu bokusebenza (ubuncinci kunye nobushushu obukhulu) kunye neliphakathi (ukutya, ukutsha).Xa ukhetha, nikela ingqalelo kwiiparamitha ezikhankanywe ngasentla zeemeko zokusebenza kunye neeparitha zobugcisa be-valve zihambelana.

3. Khetha ngokwesakhiwo sofakelo.Isakhiwo sofakelo lwenkqubo yombhobho ibandakanya intambo yombhobho, i-flange, i-ferrule, i-welding, i-hose kunye nokunye.Ngoko ke, isakhiwo sofakelo lwe-valve kufuneka sihambelane nesakhiwo sofakelo lombhobho, kwaye imilinganiselo kunye nemilinganiselo kufuneka ihambelane.

Ukufakwa kwevalve yobhedu

1. I-valve exhunywe ngentambo yombhobho idibaniswe nentambo yombhobho yokuphela kombhobho.Umtya wangaphakathi unokuba yintambo yombhobho we-cylindrical okanye intambo yombhobho we-tapered, kwaye intambo yangaphandle kufuneka ibe yintambo yombhobho.

2. I-valve yesango kunye nokudibanisa intambo yangaphakathi idibaniswe ekupheleni kombhobho, kwaye ubude bentambo yangaphandle yokuphela kombhobho kufuneka ilawulwe.Ukuze kuthintelwe ukuphela kombhobho ekubeni ujijwe ngokugqithisileyo ukucinezela umphezulu wesiphelo wangaphakathi womsonto wombhobho wevalvu yesango, isitulo sevalve siya konakala kwaye ukusebenza kokutywina kuya kuchaphazeleka.

3. Iivalvu ezidityaniswe nentambo yombhobho, xa ufaka kwaye uqinisa, i-wrench kufuneka ihlulwe kwi-hexagonal okanye inxalenye ye-octagonal ekupheleni kwentambo, kwaye akufanele ihlulwe kwi-hexagonal okanye inxalenye ye-octagonal kwelinye icala le-valve. ukuphepha ukuguqulwa kwevalve.

4. I-Flange edibanisa i-flange ye-valve kunye ne-flange yokuphela kombhobho ayihambelani kuphela neenkcukacha kunye nemilinganiselo, kodwa kunye noxinzelelo olufanayo.

5. Xa i-valve stem ifunyenwe ivuza ngexesha lofakelo kunye nokugunyaziswa kwevalve yokumisa kunye ne-valve yesango, qinisa i-nut yoxinzelelo kwi-packing, kwaye ubeke ingqalelo kumandla angamandla, ngokude nje kungabikho ukuvuza.