Oche valvụ urukurubụbabụ akụkụ mbughari n'ime valvụ ahụ, ọrụ bụ isi bụ ịkwado efere valvụ ahụ nke ọma mepere emepe ma ọ bụ mechiri emechi nke ọma, ma mebere njikwa akara. Ọtụtụ mgbe, dayameta nke oche bụ nha nke caliber valvụ. Ihe oche valvụ nru ububa dị obosara nke ukwuu, ihe ndị a na-ejikarị eme ihe bụ mkpuchi dị nro EPDM, NBR, PTFE, na metal siri ike akara carbide ihe. Ọzọ anyị ga-ewebata otu otu.
1.EPDM-Tụnyere na ndị ọzọ n'ozuzu-ebumnobi roba, EPDM roba nwere nnukwu uru, tumadi na-egosipụta na:
A. Dị oke ọnụ ahịa, na banana ndị a na-ejikarị eme ihe, EPDM's raw rubber seal bụ nke kachasị mfe, ị nwere ike ime ọtụtụ ndochi, na-ebelata ọnụ ahịa rọba.
B. EPDM ihe onwunwe ịka nká, na-eguzogide ikpughe anyanwụ, nkwụsị ọkụ, nkwụsị mmiri mmiri, nkwụsị nke radieshon, adabara acid na-adịghị ike na mgbasa ozi alkali, ihe mkpuchi dị mma.
C. Ọnọdụ okpomọkụ, nke kachasị dị ala nwere ike ịbụ -40 ° C - 60 Celsius C, nwere ike ịbụ ọnọdụ okpomọkụ 130 Celsius maka iji ogologo oge mee ihe.
2.NBR-mmanụ na-eguzogide ọgwụ, okpomọkụ na-eguzogide ọgwụ, na-eyi na-eguzogide ọgwụ na n'otu oge ahụ nwere ezigbo mmiri na-eguzogide mmiri, ikuku mkpuchi na ihe ndị magburu onwe bonding Njirimara. Ngwa ndị ọzọ na pipeline mmanụ, mwepu bụ na ọ naghị eguzogide okpomọkụ dị ala, nkwụsị ozone, ihe mkpuchi mkpuchi na-adịghị mma, elasticity bụkwa n'ozuzu.
3. PTFE: a fluorine plastic, ihe a nwere ike na-eguzogide acid na alkali, kang dị iche iche organic solvents arụmọrụ, mgbe ihe bụ elu okpomọkụ eguzogide, nwere ike ji mee ihe nọgidere na 260 ℃, kasị elu okpomọkụ nwere ike iru 290-320 ℃, PTFE pụtara, ọma dozie chemical ụlọ ọrụ, mmanụ ala, ọgwụ na ubi nke ọtụtụ ụlọ ọrụ.
4. Metal siri ike akara (carbide): metal siri ike mkpuchi valvụ oche ihe nwere ezigbo nguzogide elu okpomọkụ na elu nrụgide, corrosion na-eguzogide, na-eyi ndị na-eguzogide àgwà, dị nnọọ mma na-eme ka elu maka ntụpọ nke dị nro sealing ihe adịghị eguzogide elu okpomọkụ na elu mgbali, ma ike akara ihe na nhazi chọrọ nke usoro dị nnọọ elu, naanị mwepu nke ígwè siri ike akara valve ọrụ ga-abụ ogologo oge na-arụ ọrụ na-arụ ọrụ nke dara ogbenye.