Othandizira ma valve akugwira ntchito m'malo ovuta kwambiri, akukumana ndi:
Kukokoloka: Kumabwera chifukwa cha kuthamanga kwambiri kapena kudzaza ndi tinthu tamadzimadzi.
Zimbiri: Zochokera kuzinthu zosokoneza bongo.
Cavitation: Mapangidwe ndi kugwa kwa thovu la nthunzi, zomwe zimapangitsa kuti pakhale maenje.
Kuthamanga Kwambiri / Kutentha: Kumatsogolera ku kuphulika (kuvala zomatira) ndi mapindikidwe.
Pofuna kuthana ndi mavutowa, ma valve amkati nthawi zambiri amapangidwa kuchokera kapena kutetezedwa ndi zipangizo zamakono, ndi tungsten carbide kukhala chisankho chapamwamba pa ntchito zovuta kwambiri.
Gome lotsatirali likufotokozera mwachidule za ma valve omwe ali mkati, zovuta zawo, ndi mayankho ake:
| Chigawo | Ntchito | Common Wear Mechanisms | Njira Zothetsera Zakuthupi |
| Mpando | Amapereka malo osindikizira kuti atseke. | Kukokoloka, Cavitation, Galling, Corrosion. | Tungsten Carbide, Stellite (Cobalt-Chrome), 316SS, Aloyi 6, Ceramics. |
| Membala Wotseka (Pulogalamu/Dimba) | Amasuntha kuti atsegule/kutseka njira yolowera. | Kukokoloka, Cavitation, Galling, Corrosion. | Tungsten Carbide, Stellite, 316SS, Zitsulo Zolimba. |
| Tsinde | Imasamutsa kusuntha kuchokera ku actuator kupita ku membala wotseka. | Abrasion, Kutopa, Kuwonongeka. | 17-4PH Zitsulo Zosapanga dzimbiri, Zitsulo za Nitrided, Ma Alloys Osagwirizana ndi Corrosion. |
| Khola | Imawongolera pulagi ndikuwongolera mawonekedwe amayendedwe. | Kukokoloka Kwambiri, Cavitation, Phokoso/Kugwedezeka. | Tungsten Carbide, Stellite, 316SS, Duplex Stainless Steels. |
| Zisindikizo & Gaskets | Kumateteza kunja ndi mkati kutayikira. | Extrusion, Chemical Degradation, Kukalamba Kutentha. | PTFE (Teflon), Grafoil, Elastomers (Viton, EPDM). |
Chifukwa chiyani Tungsten Carbide ya Valve Internals?
M'magwiritsidwe ovuta omwe amapezeka m'mafakitale amafuta & gasi, opanga magetsi, ndi mafakitale opanga mankhwala, tungsten carbide Zimapangidwa chifukwa cha zinthu zotsatirazi:
Kukaniza Kokokoloka Kwapadera: Kupirira mchenga ndi zina zolimba particles mu madzimadzi mtsinje.
Kukaniza Kwabwino Kwambiri kwa Cavitation: Kuuma kwake kumalepheretsa kutaya kwa zinthu kuti zisalowetse thovu la nthunzi.
Mphamvu Yopondereza Kwambiri: Kukana mapindikidwe pansi pa kuthamanga kwambiri.
Kukana Kwabwino kwa Galling: Zikaphatikizidwa ndi chinthu chogwirizana, zimachepetsa chiopsezo chogwidwa.
Mwachidule, Valve Internals ndi mtima wa valve. Kusankhidwa kwawo, makamaka kusankha kwa zinthu zosagwira ngati tungsten carbide pazigawo zochepetsera, ndi lingaliro lofunikira laumisiri lomwe limatsimikizira mwachindunji momwe ma valavu amagwirira ntchito, moyo wautumiki, komanso chitetezo chonse pamachitidwe ovuta.
