Kwinkqubo yokuhambisa ulwelo, ivalve licandelo lolawulo eliyimfuneko, elinomsebenzi wolawulo, ukuphambukisa, ukuchasa umva, ukunqunyulwa, kunye ne-shunt. Ivalve isetyenziswa kakhulu kwiindawo zoshishino kunye nezoluntu. Ivalve yobushushu obuphezulu luhlobo oluqhele ukusetyenziswa kwiivalvu. Iimpawu zayo ezithile zimi ngolu hlobo lulandelayo: ukusebenza kakuhle kokucima, ukucima okunzulu kunokwenziwa; ukuwelda okulungileyo; ukufunxa kakuhle kwempembelelo, kunzima ukuyonakalisa ngobundlobongela; Ukucaphuka kudla ngokuncipha njalo njalo. Kukho iintlobo ezininzi zeevalvu ezinobushushu obuphezulu. Eyona nto ixhaphakileyo bubushushu obuphezuluiivalve butterfly, ubushushu obuphezulu iivalve zebhola, izihluzi zobushushu obuphezulu, kunye nobushushu obuphezulu iivalve zesango.

Iivalve zesango lobushushu obuphezulu zibandakanya iivalvu zesango ezinobushushu obuphezulu, iivalve zokuvala ubushushu obuphezulu, iivalve zokujonga ubushushu obuphezulu, iivalve zebhola ezinobushushu obuphezulu, iivalve zebhabhathane ezinobushushu obuphezulu, iivalve yenaliti ezinobushushu obuphezulu, iivalve zenaliti zobushushu obuphezulu, kwaye iivalvu zokunciphisa uxinzelelo lobushushu obuphezulu. Phakathi kwazo, ezona zisetyenziswa kakhulu ziivalve zesango, iivalve zeglowubhu, iivalve zokutshekisha, iivalve zebhola kunye neevalve zebhabhathane.

Iimeko zokusebenza zobushushu obuphezulu zibandakanya ubushushu obuphantsi, ubushushu obuphezulu Ⅰ,ubushushu obuphezulu Ⅱ, ubushushu obuphezulu Ⅲ, ubushushu obuphezulu Ⅳ, kunye nobushushu obuphezulu Ⅴ, eziya kwaziswa ngokwahlukeneyo ngezantsi.

1. Ubushushu obuphantsi-phezulu

Ubushushu obuphantsi-buphezulu buthetha ukuba ubushushu bokusebenza bevalve bukwingingqi ye-325 ～425 ℃. Ukuba indawo ephakathi ngamanzi kunye nomphunga, iWCB, WCC, A105, WC6 kunye neWC9 zisetyenziswa kakhulu. Ukuba i-medium ioli enesulfure, i-C5, i-CF8, i-CF3, i-CF8M, i-CF3M, njl., echasene ne-sulfide corrosion, isetyenziswa kakhulu. Zisetyenziswa kakhulu kwi-atmospheric kunye nezixhobo zokunciphisa uxinzelelo kunye nokulibaziseka kwezixhobo zokucokisa kwiindawo zokucoca. Ngeli xesha, iivalvu ezenziwe CF8, CF8M, CF3 kunye CF3M azisetyenziselwa ukuxhathisa umhlwa izisombululo asidi, kodwa zisetyenziselwa iimveliso zeoli ezinesalfure kunye nemibhobho yeoli negesi. Kule meko, ubushushu obuphezulu bokusebenza kweCF8, CF8M, CF3 kunye neCF3M yi-450 ° C.

2. Ubushushu obuphezulu Ⅰ

Xa ubushushu bokusebenza kwevalve yi-425 ～550 ℃, yiklasi yobushushu obuphezulu I (ebizwa ngokuba yi-PI class). Izinto eziphambili zevalve yodidi lwe-PI "ubushushu obuphezulu Ⅰ grade medium carbon chromium nickel ezinqabileyo zomhlaba titanium high quality-resistant steel steel" kunye CF8 njengemilo esisiseko ASTMA351 standard. Ngenxa yokuba ibakala le-PI ligama elikhethekileyo, ingcamango yensimbi engenasici (P) ephezulu yokushisa ifakiwe apha. Ngoko ke, ukuba indawo yokusebenza ngamanzi okanye umphunga, nangona intsimbi ephezulu yobushushu be-WC6 (t≤540 ℃) okanye i-WC9 (t≤570 ℃) ingasetyenziswa, ngelixa iimveliso ze-oyile ezinesulfure zingasetyenziselwa ubushushu obuphezulu. C5 (ZG1Cr5Mo), kodwa Azinakubizwa ngokuba yi-PI-class apha.

3. Ubushushu obuphezulu II

Ubushushu bokusebenza kwevalve yi-550 ～650 ℃, kwaye ihlelwa njengobushushu obuphezulu Ⅱ (ibizwa ngokuba yiP Ⅱ). Ivalve yeklasi ye-PⅡ yobushushu obuphezulu isetyenziswa ikakhulu kwisixhobo sokuqhekeka se-oyile esinzima sokucokisa. Iqulethe i-valve yesango ekwazi ukumelana nobushushu obuphezulu obusetyenziswa kumbhobho ojikeleza kathathu kunye nezinye iindawo. Izinto eziphambili zevalve yebakala le-PⅡ “bubushushu obuphezulu Ⅱ ibakala eliphakathi kwekhabhoni chromium nickel enqabileyo yomhlaba titanium tantalum eyomelezwe yintsimbi ekwaziyo ukumelana nobushushu” kunye neCF8 njengemilo esisiseko kumgangatho we-ASTMA351.

4. Ubushushu obuphezulu III

Ubushushu bokusebenza kwevalve yi-650 ～730 ℃, kwaye ihlelwa njengobushushu obuphezulu III (ekubhekiswa kuyo njenge PⅢ). PⅢ iivalvu zeqondo lobushushu eliphezulu zisetyenziswa ikakhulu kwiiyunithi ezinkulu zokuqhekeka kweoli enzima kwiindawo zokucokisa. Esona sixhobo siphambili seklasi ye-PⅢ ivelufa yobushushu obuphezulu yiCF8M esekwe kwi-ASTMA351.

5.Ubushushu obuphezulu Ⅳ

Ubushushu bokusebenza kwevalve yi-730 ～816 ℃, kwaye inikwe ubushushu obuphezulu IV (ibizwa ngokuba yiPIV ngokufutshane). Umda ophezulu wokushisa okusebenzayo kwe-valve ye-PIV yi-816 ℃, kuba ubushushu obuphezulu obunikezelwa ngumgangatho we-ASMEB16134 woxinzelelo-ubushushu obukhethiweyo kwi-design valve yi-816 ℃ (1500υ). Ukongezelela, emva kokuba ubushushu bokusebenza budlula i-816 ° C, intsimbi isondele ekungeneni kwindawo yokushisa yokubumba. Ngeli xesha, isinyithi sikwindawo yokuguqulwa kweplastiki, kwaye isinyithi sineplastiki elungileyo, kwaye kunzima ukujamelana noxinzelelo oluphezulu lokusebenza kunye nempembelelo yempembelelo kwaye uyigcine ekukhubazeni. Izinto eziphambili zevalve ye-P Ⅳ yi-CF8M kumgangatho we-ASTMA351 njengemilo esisiseko "ubushushu obuphezulu Ⅳ medium carbon chromium nickel molybdenum ezinqabileyo zomhlaba titanium tantalum eyomeleziweyo intsimbi ukumelana nobushushu". I-CK-20 kunye ne-ASTMA182 umgangatho we-F310 (kubandakanywa umxholo we-C ≥01050%) kunye ne-F310H yensimbi engenasici.

6, ubushushu obuphezulu Ⅴ

Ubushushu bokusebenza kwevalve bungaphezulu kwe-816 ℃, ekubhekiselwa kuyo njenge-PⅤ, i-PⅤ ivalve yobushushu obuphezulu (kwivalve evaliweyo, engalawulekiyo ivalve yebhabhathane) kufuneka yamkele iindlela zokuyila ezikhethekileyo, ezinje nge-lining insulation lining okanye amanzi okanye igesi yokupholisa itoti. qinisekisa ukusebenza okuqhelekileyo kwevalve. Ngoko ke, umda ophezulu wokushisa okusebenzayo kweklasi ye-PⅤ i-valve ephezulu yokushisa ayichazwanga, kuba ukushisa okusebenzayo kwevalve yokulawula akugqitywanga kuphela ngezinto eziphathekayo, kodwa ngeendlela ezikhethekileyo zokuyila, kunye nomgaqo osisiseko wendlela yokuyila. iyafana. Ivalve yeqondo eliphezulu le-PⅤ inokukhetha izixhobo ezifanelekileyo ezinokuhlangabezana nevalve ngokwendlela yayo yokusebenza kunye noxinzelelo lokusebenza kunye neendlela zoyilo ezikhethekileyo. Kwiklasi ye-PⅤ i-valve ephezulu yokushisa, ngokuqhelekileyo i-valve ye-flapper okanye i-butterfly valve ye-flue flapper valve okanye i-butterfly valve idla ngokukhethwa kwi-HK-30 kunye ne-HK-40 i-alloys ephezulu yokushisa kwi-ASTMA297 standard. I-Corrosion resistant, kodwa ayikwazi ukumelana nomothuko kunye noxinzelelo oluphezulu.