Sezvo zvinodiwa nevanhu zvekuchengetedzwa kwezvakatipoteredza zviri kuramba zvichiwedzera kuomesera, zvinodiwa zvemavharuvhu zviri kuwedzerawo, uye zvinodiwa zveanotenderwa kuvuza mwero wehupfu, unopisa uye unoputika media muzvirimwa zvepetrochemical zviri kuwedzera kuomarara.Mavharuvhu chinhu chakakosha mumidziyo ye petrochemical., Yayo yakasiyana-siyana uye huwandu hwakakura, uye ndiyo imwe yenzvimbo huru yekudonha mumudziyo.Kune midhiya ine chepfu, inopfuta uye inoputika, mhedzisiro yekubuda kwekunze kwevhavha yakakomba kupfuura kubuda kwemukati, saka izvo zvekubuda kwekunze zvinodiwa zvevhavha zvakakosha.Kudonha kwakaderera kwevharuvhu kunoreva kuti kudonha chaiko kudiki, izvo zvisingakwanisi kutariswa neyakajairwa mvura yekumanikidza uye mhepo yekuisa chisimbiso miedzo.Zvinoda nzira dzakawanda dzesainzi uye zviridzwa zvakaomarara kuti zvione kubuda kwekunze kudiki.

Anowanzo shandiswa zviyero zvekuona kudonha kwakaderera ISO 15848, API624, EPA nzira 21, TA luft uye Shell Oiri Kambani SHELL MESC SPE 77/312.

Pakati pavo, ISO kirasi A ine zvinodiwa zvakanyanya, inoteverwa neSHELL kirasi A. Panguva ino,NSEN yakawana zvinotevera zvitupa;

ISO 15848-1 kirasi A

API 641

TA-Luft 2002

Kuti isangane nezvinodiwa zvekudonha kwakaderera, mavharuvhu castings anofanirwa kusangana nezvinodiwa zvehelium gasi bvunzo.Nekuti huremu hwemamorekuru hwehelium mamorekuru idiki uye nyore kupinda, kunaka kwekukanda ndiyo kiyi.Kechipiri, chisimbiso pakati pemuviri wevharuvhu uye chivharo chekupedzisira chinowanzo chisimbiso chegasket, inova chisimbiso chakamira, chiri nyore kuzadzisa zvinodiwa zvekuvuza.Uyezve, chisimbiso pahunde yevharuvhu chisimbiso chine simba.Iyo graphite particles inotorwa nyore nyore kubva pakurongedza panguva yekufamba kwevhavha stem.Naizvozvo, yakakosha yakaderera-leakage packing inofanira kusarudzwa uye kucheneswa pakati pekurongedza nevhavha stem kunofanirwa kudzorwa.Kucheneswa pakati pesimba rekumanikidza uye dzinde revharuvhu uye bhokisi rekuisa, uye kudzora kushata kwehunde yevharuvhu uye bhokisi rekuisa.