Iphedi yokugoqa insimbi yinto evamise ukusetshenziswa yokuvala, eyenziwe ngezinsimbi ezahlukene (njengensimbi engagqwali, ithusi, i-aluminium) noma isilonda seshidi lengxubevange. Inokuqina okuhle nokumelana nokushisa okuphezulu, ukumelana nokucindezela, ukumelana nokugqwala nezinye izici, ngakho-ke inezinhlobonhlobo zezicelo embonini ye-valve.

Iphedi yokusonta yensimbi isebenzisa ngobuhlakani ukumelana nokushisa, ukuqina namandla ensimbi kanye nokuthamba kwezinto ezingezona ezensimbi, ngakho-ke ukusebenza kokuvala kuba ngcono, kanye nokusebenza kwetheyiphu yensimbi engagqwali ukugoqa i-flexible graphite pad kungcono kakhulu. Isilinganiso sokucindezelwa ngaphambili sincane kunaleso sephedi yokusonta ye-asbestos, futhi akukho sici sokuvuza kwe-asbestos fibre capillary. Endaweni kawoyela, i-0Cr13 isetshenziselwa imicu yensimbi, kuyilapho i-1Cr18Ni9Ti inconyelwa enye imidiya.

Insimbi engagqwali enephedi yokujika ye-graphite eguquguqukayo endaweni yegesi, ukusetshenziswa kokucindezela kwe-14.7MPa, oketshezini kungasetshenziswa kufika ku-30MPa. Izinga lokushisa -190 ~ + 600 ℃(uma ungekho umoya-mpilo, ukucindezela okuphansi kungasetshenziswa ku-1000 ℃).

Iphedi ejikajikayo ifanele izishintshisi zokushisa, ama-reactors, amapayipi, ama-valve, nama-pump inlet nama-flange wokuphuma anengcindezi enkulu kanye nokushintshashintsha kwezinga lokushisa. Ngokucindezela okuphakathi noma okuphezulu namazinga okushisa angaphezu kuka-300 ° C, ukusetshenziswa kwamasongo angaphakathi, angaphandle noma angaphakathi kufanele kucatshangelwe. Uma i-concave ne-convex flange isetshenziswa, iphedi yesilonda enendandatho yangaphakathi ingcono.

Umphumela omuhle wokuvala ungatholakala futhi ngokunamathisela amapuleti e-graphite aguquguqukayo ezinhlangothini zombili zephedi yokuvunguza ye-graphite eguquguqukayo. I-boiler yokushisa imfucuza yesitshalo esikhulu somanyolo wamakhemikhali iyisisetshenziswa esibalulekile sokushisa okuphezulu nokucindezela okuphezulu. Kusetshenziswa iphedi yokuvunguza ye-graphite enendandatho yangaphandle, engavuzi lapho umthwalo ugcwele, kodwa iyavuza lapho umthwalo wehliswa. Ipuleti le-graphite eliguquguqukayo elingu-0.5mm ubukhulu liyengezwa ezinhlangothini zombili ze-gasket futhi lisikwe libe yi-arc shape. Ingxenye ehlangene yenziwe nge-diagonal lap joint, esetshenziswa kahle.