Zibelesyo zyakujala mavalvu nchintu chipati mukujala mavalvu. Ino nzibelesyo nzi zyakujala mavalvu? Tulizyi kuti zibelesyo zyakujala mavwili zilaandaanizyigwa muzibeela zyobile: zyabutale azitali zyabutale. Eezyi zitobela nzintu zifwaafwi zyakubelesya zibelesyo zyakujala zisiyene, antoomwe amisyobo yamavalvu iibelesyegwa loko.
1. Raba yakupanga
Bube bwa raba bwakupanga mbuli kukazya mafuta, kukazya kupya akukazya kubola mbubotu kwiinda bwa raba bwacilengwaleza. Kanjaanji, kupya kwakubelesya raba kwakupanga nkwa t≤150°C, mpawo kupya kwa raba kwachilengwaleza nkwa t≤60°C. Rabba ilabelesyegwa kujala mavalvu aanyika,vvalavu yamulyango uukkede a raba, mavalvu aa diaphragm,rubber seated butterfly valve, rubber uukkala uuzungaana (mavalvu aakulanga), mavalvu aakusinkilila alimwi amavalvu aambi ajisi nguzu zya PN≤1MPa.
2. Nayiloni
Nayiloni ilijisi bube bwakuzwangana kusyoonto akukwabilila kubola. Nylon ilabelesyegwa kapati kumavalvu aamabbola amavalvu aamunyika aajisi kupya kwa t≤90°C antoomwe akutontola kwa PN≤32MPa.
3. PTFE
PTFE ibelesyegwa kapati kumavalvu aanyika,mavalvu aamulyango, mavwili aamabbola, azimwi zili atempelecha t≤232°C antoomwe akutontola kwa PN≤6.4MPa.
4. Butale bupangwa
Butale bupangwa bulabelesyegwavvalavu yamulyango, vvalavu ya globe, vvalavu ya plug, azimwi. zyakupya t≤100°C, muya uuzyibidwe PN≤1.6MPa, muya amafuta.
5. Babbitt alloy
Musamu wa Babbitt ubelesyegwa ku ammonia globe valve a temperature t-70~150°C antoomwe a nominal pressure PN≤2.5MPa.
6. Mukuba uusanganizidwe
Zintu zibelesyegwa kapati mukupanga mukuba zili 6-6-3 tin bronze antoomwe a 58-2-2 manganese brass. Musamu wa copper ulaanguzu zyakukazya kusama mpawo ulakonzya kubelesegwa mumaanzi amuwo uupya t≤200°C antoomwe a PN≤1.6MPa. Chiindi chiingi chibelesegwa mumavalvu aamulyango, mavalvu aamunyika,mavalvu aakulanga, mavalvu aapulagi, azimwi.
7. Chrome stainless steel
Misyobo iibelesyegwa kapati ya chromium stainless steel nja 2Cr13 antoomwe a 3Cr13, eezyo zyakazimwa akuyumizigwa, mpawo zilakonzya kukazya kubola. Chiindi chiingi chibelesegwa mumavalvu aazibelesyo zilimbuli maanzi, busi, amafuta aajisi kupya t≤450°C antoomwe akutontola kwa PN≤32MPa.
8. Chromium-nickel-titanium stainless steel
Musyobo uubelesyegwa kapati wa chromium-nickel-titanium stainless steel ngu 1Cr18Ni9ti, ooyo uukonzya kukazya kubola, kukazya kubola akukwabilila kupya. Chili kabotu ku busi, nitric acid azimwi zintu zili a temperature t≤600°C antoomwe a nominal pressure PN≤6.4MPa, zibelesyegwa ku globe valve, ball valve, azimwi.
9. Butale bujisi nitride
Musyobo uubelesyegwa kapati wa nitrided steel ngu 38CrMoAlA, ooyo uukwabilila kubola akukwabililwa kuzwa kukunyonyooka nikwakamana kusilikwa. Chiindi chiingi chibelesegwa mumulyango wamagesi aamagesi aajisi kupya t≤540°C antoomwe akutontola kwa PN≤10MPa.
10. Kupa boroni
Kubelesya boronizing kulabamba busena bwakujala kuzwa kuzintu zyamubili wavalvu naakuti mubili wadisiki, mpawo akuchita mulimo wakubamba busena bwa boronizing, busena bwakujala bulakonzya kukazya kusama. Ibelesyegwa muchibbadela chamagesi.
Chiindi chakutumizya: Jun-10-2022
