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 maloanlahla a 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