Ithute ka mefuta e fapaneng ea li-valve tse sebelisoang indastering ea oli le khase le phapang ea tsona: API le liheke tsa ASME, lefats'e, cheke, bolo, le meralo ea serurubele (e entsoeng ka letsoho kapa e ts'oaroang, e nang le 'mele e qheketsoeng le e entsoeng). Ka bokhuts'oane, li-valve ke lisebelisoa tsa mochini tse sebelisoang lits'ebetsong tsa liphaephe ho laola, ho laola le ho bula / ho koala phallo le khatello ea mokelikeli. Li-valve tse entsoeng ka maiketsetso li sebelisoa bakeng sa lipeipi tse nyane kapa tse nang le khatello e phahameng, li-valve tsa liphaephe tse ka holimo ho lisenthimithara tse peli.
VALVE KE ENG?
Mefuta e fapaneng ea li-valve tse sebelisoang indastering ea petrochemical e lumellana le efe kapa efe ea lits'ebetso tse latelang:
1. Qala/ emisa ho phalla ha mokelikeli (hydrocarbon, oli & gase, mouoane, metsi, li-acid) ka phala (mohlala: belofo ea heke, belofo ea bolo, belofo ea serurubele, belofo ea heke ea thipa, kapa valve ea plug)
2. Beakanya phallo ea mokelikeli ka phaephe (mohlala: valve ea globe)
3. Laola ho phalla ha mokelikeli (valve e laolang)
4. Fetola tsela eo phallo e tsamaeang ka eona (mohlala, valve ea 3-ball)
5. Laola khatello ea ts'ebetso (valve e fokotsang khatello)
6. Sireletsa tsamaiso ea liphaephe kapa sesebelisoa (pompo, koloi, tanka) ho tloha khatellong e feteletseng (tšireletseho kapa khatello ea khatello) kapa khatello ea mokokotlo (check valve)
7. Sefa lithōle tse phallang ka phaephe, ho sireletsa lisebelisoa tse ka 'nang tsa senngoa ke likarolo tse tiileng (y le basket strainers)
Valve e etsoa ka ho kopanya likarolo tse ngata tsa mochini, tse ka sehloohong e le 'mele (khetla e ka ntle), trim (motsoako oa likarolo tse ka nkeloang sebaka), kutu, bonnet le mochini o sebetsang (lever ea letsoho, gear kapa mohlohleletsi).
Li-valve tse nang le boholo bo nyane (ka kakaretso li 2 inches) kapa tse hlokang ho hanyetsa khatello le mocheso li entsoe ka 'mele oa tšepe o entsoeng; li-valve tsa khoebo tse ka holimo ho lisenthimithara tse 2 ka bophara li na le lisebelisoa tsa 'mele.
VALVE KA MORATSO
● TŠEBELETSO EA KETE: Mofuta ona ke oona o sebelisoang ka ho fetisisa lipeiping le lipeiping. Li-valve tsa heke ke lisebelisoa tse tsamaeang ka mola o sebelisoang ho buloa le ho koala phallo ea mokelikeli (valafo ea ho koala). Li-valve tsa heke li ke ke tsa sebelisoa bakeng sa lits'ebetso tsa throttling, ke hore, ho laola phallo ea mokelikeli (li-valve tsa globe kapa bolo li lokela ho sebelisoa ntlheng ena). Ka hona, valve ea heke e buloa kapa e koetsoe ka botlalo (ka mabili a matsoho, likere kapa li-actuator tsa motlakase, tsa pneumatic le hydraulic)
● GLOBE VALVE: Mofuta ona oa valve o sebelisetsoa ho kokobetsa (ho laola) phallo ea mokelikeli. Li-valve tsa globe le tsona li ka koala phallo, empa bakeng sa ts'ebetso ena, li-valve tsa heke lia khethoa. Belofo ea globe e etsa hore khatello e theohe phaepheng, kaha mokelikeli o tlameha ho feta tselaneng e se nang moeli.
● HLOKOMELA VALVE: mofuta ona oa valve o sebelisetsoa ho qoba ho khutlela morao tsamaisong ea liphaephe kapa liphaephe tse ka senyang lisebelisoa tse theohelang tlaase joaloka lipompo, li-compressor, joalo-joalo. Ha mokelikeli o e-na le khatello e lekaneng, e bula valve; ha e khutla (reverse flow) ka khatello ea moralo, e koala valve - ho thibela phallo e sa batleheng.
● BOLO VALVE: Balofo ea Ball ke valve ea kotara e sebelisoang bakeng sa kopo ea ho koala. Belofo e bula le ho koala phallo ea mokelikeli ka bolo e hahiloeng ka hare, e potolohang ka har'a 'mele oa valve. Li-valve tsa bolo ke maemo a indasteri bakeng sa lits'ebetso tse timang 'me li bobebe ebile li kopane ho feta li-valve tsa heke, tse sebeletsang merero e ts'oanang. Meralo e 'meli e meholo ke e phaphametseng le trunnion (ho kena ka lehlakoreng kapa ka holimo)
● BUTTERFLY VALVE: Ena ke belofo e feto-fetohang, e bolokang chelete e ngata, ho fetola kapa ho bula/ho koala phallo ea mokelikeli. Li-valve tsa serurubele li fumaneha ka mokhoa o concentric kapa oa eccentric (habeli/haro), li na le sebopeho se kopaneng 'me li ntse li qothisana lehlokoa le li-valve tsa bolo, ka lebaka la kaho ea tsona e bonolo le litšenyehelo.
● PINCH VALVE: Ona ke mofuta oa li-valve tse tsamaeang ka mola o ka sebelisoang bakeng sa ho thethefatsa le ho koala ts'ebetso ea liphaephe tse sebetsanang le lisebelisoa tse tiileng, li-slurries le maro a teteaneng. Pinch valve e na le tube ea pinch ho laola phallo.
● PLUG VALVE: Sephahla sa plug se khetholloa e le sephahla sa kotara bakeng sa lisebelisoa tsa ho koala. Li-valve tsa pele tsa plug li ile tsa hlahisoa ke Baroma ho laola liphaephe tsa metsi.
● SIRELETSO EA TŠEBELETSO: Belofo e sireletsang e sebelisoa ho sireletsa tokisetso ea lipeipi khatellong e feteletseng e kotsi e ka ’nang ea beha bophelo ba batho kotsing kapa thepa e ’ngoe. Ha e le hantle, valve ea tšireletso e lokolla khatello ha boleng ba sete bo feta.
● TLHOKOMELISO EA TLHOKOMELISO: tsena ke li-valve tsa ho iketsetsa mekhoa e rarahaneng ea petrochemical.
● Y-STRAINERS: le hoja e se valve e nepahetseng, Y-strainers e na le mosebetsi oa bohlokoa oa ho sefa lithōle le ho sireletsa lisebelisoa tse ka tlaase ho metsi tse ka 'nang tsa senyeha ka tsela e' ngoe.
Nako ea poso: Oct-26-2019