E like me nā koi o ka poʻe no ka mālama ʻana i ke kaiapuni ke piʻi aʻe a ʻoi aku ka paʻakikī, ke piʻi nei nā koi no nā valves, a ʻo nā koi no ka pae leakage ʻae ʻia o nā mea ʻawaʻawa, combustible a pahū i nā mea kanu petrochemical e lilo a ʻoi aku ka ikaika.ʻO nā valves he mea pono loa i nā mea kanu petrochemical., Nui kona ʻano a me ka nui, a ʻo ia kekahi o nā kumu leakage nui i ka hāmeʻa.No nā meaʻawaʻawa, pahū a pahū, ʻoi aku ka koʻikoʻi o nā hopena o ka leakage waho o ka valve ma mua o ka leakage o loko, no laila he mea koʻikoʻi nā koi leakage waho o ka valve.ʻO ka haʻahaʻa haʻahaʻa o ka valve ʻo ia ka liʻiliʻi loa o ka leakage maoli, ʻaʻole hiki ke hoʻoholo ʻia e ka wai maʻamau a me nā hoʻāʻo hoʻopaʻa ʻana i ka ea.Pono ia i nā ʻano ʻepekema a me nā mea hana maʻalahi e ʻike i ka leaka liʻiliʻi o waho.

ʻO nā kūlana maʻamau no ka ʻike ʻana i ka leaka haʻahaʻa ʻo ISO 15848, API624, EPA ala 21, TA luft a me Shell Oil Company SHELL MESC SPE 77/312.

Ma waena o lākou, aia ka papa ISO A i nā koi kiʻekiʻe loa, a ma hope o ka papa SHELL A. ʻO kēia manawa,Ua loaʻa iā NSEN nā palapala hōʻoia maʻamau;

ISO 15848-1 papa A

API 641

TA-Luft 2002

I mea e hoʻokō ai i nā koi o ka leakage haʻahaʻa, pono e hoʻokō nā hoʻoheheʻe valve i nā koi o ka hoʻāʻo helium gas.No ka mea he liʻiliʻi a maʻalahi ke kau ʻana o ke kaumaha o ka helium, ʻo ka maikaʻi o ka hoʻolei ʻana ke kī.ʻO ka lua, ʻo ka sila ma waena o ke kino valve a me ka uhi hope he sila gasket, ʻo ia ka sila static, maʻalahi e hoʻokō i nā koi leakage.Eia kekahi, ʻo ka sila ma ke kumu valve he sila hoʻoikaika.Lawe maʻalahi nā ʻāpana graphite mai ka paʻi ʻana i ka wā o ka neʻe ʻana o ke kumu valve.No laila, pono e koho ʻia ka hoʻopili haʻahaʻa haʻahaʻa kūikawā a pono e hoʻomalu ʻia ka ʻae ʻana ma waena o ka packing a me ke kumu valve.ʻO ka hoʻomaʻemaʻe ma waena o ka lima kaomi a me ka pahu valve a me ka pahu pahu, a me ka mālama ʻana i ka hana ʻino o ka pahu valve a me ka pahu pahu.