Polytetrafluoroethylene(Teflon ma ọ bụ PTFE), nke a na-akpọkarị "eze rọba", bụ ngwakọta polymer nke tetrafluoroethylene mere site na polymerization, nke nwere ezigbo nkwụsi ike nke kemịkalụ, nguzogide corrosion, akara, nnukwu lubrication na-abụghị viscosity, mkpuchi eletrik na ezigbo ntachi obi na-egbochi ịka nká.

PTFE dị mfe oyi na-asọba ma na-akpụ akpụ n'okpuru nrụgide na okpomọkụ dị elu, n'ihi ya, a na-ejikarị ya eme ihe maka nrụgide dị ala, okpomọkụ nke ọkara, corrosion siri ike ma ghara ikwe ka mmetọ nke ọkara, dị ka acid siri ike, alkali, halogen, ọgwụ na ihe ndị ọzọ. . The nchekwa na-arụ ọrụ okpomọkụ bụ 150 ℃ na nrụgide bụ n'okpuru 1MPa. juputara ike PTFE ga-abawanye, mana ojiji okpomọkụ agaghị agafe 200 ℃, ma ọ bụghị ya, nguzogide corrosion ga-ebelata. Nrụgide ojiji kachasị nke mbukota PTFE abụghị ihe karịrị 2MPa.

N'ihi mmụba nke okpomọkụ, ihe ahụ ga-akpụ akpụ, na-eme ka mbelata dị ukwuu na nrụgide akara. Ọbụlagodi na ọnọdụ okpomọkụ dị mma, yana ịgbatị oge, nrụgide mkpakọ nke elu mkpuchi ga-ebelata, na-ebute "ihe ntụrụndụ nchekasị". Ihe omume a ga-eme n'ụdị gaskets dị iche iche, mana ntụrụndụ nke PTFE pad dị njọ karị, ma kwesịrị ịmụrụ anya.

The esemokwu ọnụọgụ nke PTFE bụ obere (mkpakọ nchegbu bụ ukwuu karịa 4MPa, esemokwu ọnụọgụ bụ 0.035 ~ 0.04), na gasket dị mfe ileghara apụta mgbe tupu tightening, n'ihi ya, ọ kasị mma iji concave na convex flange elu. Ọ bụrụ na ejiri flange dị larịị, enwere ike ịkpọtụrụ dayameta mpụta nke gasket na bolt iji gbochie gasket ka ọ ghara ịpụ n'èzí.

N'ihi na a na-agbanye ihe mkpuchi iko ahụ mgbe ọ gbasasịrị oyi akwa nke enamel n'elu ígwè ahụ, oyi akwa na-egbuke egbuke na-agbaji nke ọma, jikọtara ya na spraying na-enweghị isi na glaze Layer na-asọ asọ, elu elu nke flange adịghị mma. The metal mejupụtara gasket dị mfe imebi glaze oyi akwa, n'ihi ya, a na-atụ aro ka iji isi ihe mere nke asbestos osisi na roba PTFE mbukota. Nkwakọ ngwaahịa dị mfe dabara na flange elu ma na-eguzogide corrosion, na mmetụta ojiji dị mma.

E nwere ọtụtụ ụlọ mmepụta ihe na okpomọkụ, nrụgide adịghị elu na ike corrosive ọkara, ojiji nke asbestos roba efere ọbọp PTFE raw material belt, n'ihi na mgbe disassembled manholes, ọkpọkọ. N'ihi na mmepụta na ojiji dị nnọọ adaba, nnọọ ewu ewu.