He mea hoʻopaʻa maʻamau i hoʻohana ʻia me nā metala ʻē aʻe (e like me ke kila kila, keleawe, aluminika) a i ʻole ka ʻeha pepa. Loaʻa iā ia ka elasticity maikaʻi a me ke kūpaʻa wela kiʻekiʻe, ka pale ʻana i ke kaomi, ka pale ʻana i ka corrosion a me nā ʻano ʻē aʻe, no laila he ākea ka nui o nā noi i ka ʻoihana valve.

Hoʻohana akamai ʻo Metal winding pad i ka pale wela, resilience a me ka ikaika o ka metala a me ka palupalu o nā mea non-metallic, no laila ʻoi aku ka maikaʻi o ka hana hoʻopaʻa ʻana, a ʻoi aku ka maikaʻi o ka hana ʻana o ke kila kila lipine wili flexible graphite pad. ʻOi aku ka liʻiliʻi o ka lākiō precompression ma mua o ka pad winding asbestos, a ʻaʻohe hemahema o ka leakage capillary fiber asbestos. Ma ka ʻaila ʻaila, hoʻohana ʻia ka 0Cr13 no nā ʻāpana metala, ʻoiai ʻo 1Cr18Ni9Ti e ʻōlelo ʻia no nā mea hoʻolaha ʻē aʻe.

ʻO ke kila kila me ka graphite hikiwawe pad i loko o ke kinoea, hiki ke hoʻohana ʻia ke kaomi o 14.7MPa, i ka wai a hiki i 30MPa. ʻO ka mahana -190 ~ + 600 ℃ (i ka nele o ka oxygen, hiki ke hoʻohana i ke kaomi haʻahaʻa i 1000 ℃).

He kūpono ka pad wili no nā mea hoʻololi wela, nā reactors, pipelines, valves, a me nā flanges inlet a me nā puka puka me ka nui o ke kaomi a me nā loli wela. No nā puʻe waena a kiʻekiʻe paha a me nā mahana ma mua o 300 ° C, pono e noʻonoʻo ʻia ka hoʻohana ʻana i nā apo o loko, waho a i ʻole. Inā hoʻohana ʻia ka flange concave a me convex, ʻoi aku ka maikaʻi o ka pā ʻeha me ke apo o loko.

Hiki ke loaʻa ka hopena sila maikaʻi ma ka hoʻopili ʻana i nā papa graphite maʻalahi ma nā ʻaoʻao ʻelua o ka pā wili graphite maʻalahi. ʻO ka paila wela wela o kahi mea kanu mea kanu kemika nui kahi mea nui o ka wela kiʻekiʻe a me ke kaomi kiʻekiʻe. Hoʻohana ʻia ka graphite winding pad me ke apo o waho, ʻaʻole ia e kahe i ka wā e piha ai ka ukana, akā e kahe i ka wā e hoʻemi ʻia ai ka ukana. Hoʻohui ʻia kahi pā graphite maʻalahi he 0.5mm mānoanoa ma nā ʻaoʻao ʻelua o ka gasket a ʻoki ʻia i ke ʻano arc. Hana ʻia ka ʻāpana hui i ka hui ʻana o ka diagonal, kahi i hoʻohana maikaʻi ʻia.