Kujala vvalavu nchintu chipati mu vvalavu yoonse, mulimo wayo mupati ngwakukwabilila kuti kutabi kuvwundauka,vvalavuchibbula chakujala alimwi chiitwa kuti nkomo yakujala, nimbunga iijatikizyidwe aachintu chili mumupayipi mpawo chikwabilila kuti chijatikizyigwe kuti chitanjili. Eelyo vvalavu noili mukubelesegwa, kuli zintu zyiingi zili mumupayipi, zilimbuli maanzi, muya, mafuta, zintu zikonzya kubola, azimwi, mpawo zijazyo zyamavalavu zisiyene-siyene zilabelesyegwa mumasena aasiyene-siyene mpawo zilakonzya kweendelana azintu zisiyene-siyene.
TWSValvechikuyeezya kuti zibelesyo zyakujala mavalvu zilakonzya kwaandaanizyigwa muzibeela zyobile, nkokuti zibelesyo zyabutale azintu zitali zyabutale. Zijazyo zitali zyabutale kanjikanji zibelesyegwa mumapaipi aawo mpokupya akutontola, mpawo zijazyo zyabutale zilakonzya kubelesegwa munzila zyiingi mpawo zilakonzya kubelesegwa aawo nokwapya kapati. kusinikizyigwa kupati.
Raba yakupanga ili kabotu kwiinda raba yachilengwaleza mumakani aakukazya mafuta, kukazya kupya akukaka kubola. Kanjaanji, kupya kwakubeleka kwa raba yakupanga nkwakuti t≤150°C, raba yachilengwaleza t≤60°C, mpawo raba ilabelesyegwa kujala mavalvu aa globe, mavalvu aamulyango, mavalvu aa diaphragm, mavalvu aa butterfly, mavalvu aakulanga, mavalvu aa pinch alimwi amavalvu aambi ajisi nguzu zya PN≤1MPa.
2. Nayiloni
Nayiloni ilijisi bube bwakuzwangana kusyoonto akukwabilila kubola. Nylon ilabelesyegwa kapati kumavalvu aamabbola antoomwe amavalvu aamunyika aajisi kupya t≤90°C a nominal pressure PN≤32MPa.
PTFE ibelesyegwa kapati kumavalvu aanyika, mavalvu aamulyango, mavalvu aamubbola, azimwi zili atempelecha t≤232°C antoomwe akusinikizyigwa kwa PN≤6.4MPa.
4. Butale bupangwa
Butale bupangwa bubelesyegwa kupanga mavalvu aamulyango, mavalvu aamunyika, mavalvu aapulagi, azimwi.≤100°C, muya uutegwa PN≤1.6MPa, muya amafuta.
5. Babbitt alloy
Musamu wa Babbitt ubelesyegwa ku ammonia globe valve a temperature t-70~150℃antoomwe akusinikizyigwa kwa PN≤2.5MPa.
6. Mukuba uusanganizidwe
Zintu zibelesyegwa kapati mukupanga zintu zya copper zili 6-6-3 tin bronze antoomwe a 58-2-2 manganese brass. Mukuba wamukuba ulakonzya kukazya kubola mpawo uleelela kubelesyegwa mumaanzi abusi kakuli kupya≤200℃antoomwe akusinikizyigwa kwa PN≤1.6MPa. Chiindi chiingi chibelesyegwa 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 kumavalvu aamaanzi, busi amafuta aamafuta aa≤450℃antoomwe akusinikizyigwa kwa PN≤32MPa.
8. Chrome-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 kubelesya busi azimwi zintu zili atempelecha t≤600°C antoomwe akusinikizyigwa kwa PN≤6.4MPa, mpawo ibelesyegwa kumavalvu aanyika, mavalvu aamabbola, azimwi.
9. Nitriding steel
Musyobo uubelesyegwa kapati wa nitriding steel ngu 38CrMoAlA, ooyo uukwabilila kubola akukwabililwa kuzwa kukunyonyooka nikwakamana kusilikwa. Chiindi chiingi chibelesegwa mumavalvu aamulyango wamagesi aajisi kupya t≤540℃antoomwe akusinikizyigwa kwa PN≤10MPa.
10. Kupa boroni
Kubelesya boronizing kulabamba busena bwakujala kuzwa kuzintu zyamubili wavalvu naakuti mubili wadisiki, mpawo kuchita mulimo wakubamba busena bwaboronizing. Busena bwakujala bulakonzya kukazya kusama. Kuchibbadela chamagesi.
Eelyo vvalavu noili mukubelesegwa, zintu zyeelede kubikkilwa maanu nzizyeezyi:
1. Kujala kwa valve kweelede kusunkwa kuchitila kuti kube kubeleka kabotu.
2. Langa naa busena bwakujala bwavalvu bwamana, mpawo ubambulule naakuti ubuchinche kweendelanya abukkale.
Chiindi chakutumizya: Jan-04-2023
