Ngemveliso ye-NSEN baphumelele uvavanyo lwamangqina ngokwemigangatho ye-BS 6364: 1984 yiTUV.I-NSEN iyaqhubeka nokuhambisa ibhetshi ye-bi-directional yokutywina ivalve yebhabhathane e-cryogenic.

Ivalve ye-Cryogenic isetyenziswa ngokubanzi kwishishini le-LNG.Abantu bahlawula ngakumbi nangakumbi ingqalelo kwimiba yokusingqongileyo, i-LNG, olu hlobo lwamandla acocekileyo luyathandwa.

Ekubeni ubushushu be-LNG phantsi koxinzelelo oluqhelekileyo yi--162 ℃, kwaye ineempawu zokutsha kunye nokuqhuma, ivalve yeqondo lokushisa ye-cryogenic ayihlangabezani kuphela neemfuno zokusetyenziswa kobushushu obuphantsi, kodwa kufuneka ithathele ingqalelo uyilo lokukhusela umlilo.Kungenxa yezi mfuneko ukuba ukhuseleko kunye nokuthembeka kweevalve ze-cryogenic ziya kuba phezulu kuneevalve eziqhelekileyo.

Okubaluleke ngakumbi, umzimba we-valve, i-butterfly plate, inxalenye yolwandiso kunye namalungu angaphakathi kufuneka aqhutywe nge-cryogenically ngaphambi kokugqiba ukuphelisa impembelelo yokutshintsha kwesigaba.Ngaphandle koko, ukuguqulwa kwesigaba se-martensite kuya kwenzeka kumaqondo obushushu aphantsi, kubangele ukuguqulwa kwevalve, okukhokelela ekubeni Ivalve ivuza.

Uhlobo loqhagamshelo olu kuthunyelwa luyi-flange kunye ne-wafer, kunye nempahla yomzimba wevalve kunye nediski yi-CF8M.Imathiriyeli yokutywina iseyiyo yonke uyilo lwentsimbi eqinileyo yokutywina, kunye nokukhutshwa okuphantsi kokupakishwa kwesiqu.

Ukuba unethemba lokufunda ngakumbi okanye ukufumana isisombululo seprojekthi yakho, wamkelekile ukuba uqhagamshelane nathi.