Ko ngā pūwero hurihuri-hurihuri e whakamahia whānuitia ana hei tuku hau kōpeke mō ngā mahi ahumahi nui ake. He pai ake te whakamahi i ēnei i roto i ngā mahi e hiahiatia tonutia ana te hau pērā i ngā whare tākai kai me ngā pūnaha hanga aunoa. I roto i ngā whare nui ake, he mahi wā poto noa iho pea, ko te whakamahinga toharite i waenga i ngā teihana mahi maha ka tono tonu i te pūwero. Haunga ngā waeine pumau, ko ngā pūwero hurihuri-hurihuri e whakanohoia ana ki runga i ngā wakatō tōia-muri, ā, e whakakahangia ana e ngā miihini tīhiera iti. Ko ēnei pūnaha kōpeketanga kawe ka kiia ko ngā pūwero hanga. Ka whakamahia ngā pūwero hanga hei tuku hau kōpeke ki ngā hama tīki, ki ngā taputapu rivet, ki ngā papu hau, ki ngā mahi pupuhi onepu me ngā pūnaha peita ahumahi. E kitea whānuitia ana ēnei i ngā papa hanga me te mahi tahi me ngā kapa whakatika rori puta noa i te ao.
Kore hinu
I roto i te pūwero kore-hinu, ka pēhia katoatia te hau mā te mahi a ngā tīwiri, me te kore he āwhina o te hiri hinu. Ko te mutunga iho, he iti ake te kaha o te pēhanga tukunga mōrahi. Heoi, ko ngā pūwero kore-hinu maha-wāhanga, ina pēhia te hau e ētahi huinga tīwiri, ka taea te whakatutuki i te pēhanga neke atu i te 150 psi (10 atm) me te rōrahi whakaputa neke atu i te 2,000 putu kūpiko ia meneti (57 m3/min).
Ka whakamahia ngā pūwero kore-hinu i ngā mahi kāore e whakaaetia te kawe mai o te hinu, pērā i te rangahau hauora me te hanga hau haurua-ira. Heoi, kāore tēnei e aukati i te hiahia ki te tātari, nā te mea me tango atu hoki ngā hauwaiwaro me ētahi atu poke e horomia ana i te hau taiao i mua i te whakamahinga. Nō reira, he maha tonu ngā wā e hiahiatia ana te maimoatanga hau e rite ana ki te mea e whakamahia ana mō te pūwero tīwiri kua whakakiia ki te hinu hei whakarite i te kounga o te hau kua kōpeketia.
I werohia ki te hinu
I roto i te pūwero tīwiri hurihuri i werohia ki te hinu, ka werohia te hinu ki roto i ngā kōhao pēhi hei āwhina i te hiri me te whakarato i te totohu whakamatao mō te utu hau. Ka wehea te hinu mai i te awa tukunga, kātahi ka whakamataohia, ka tātarihia, ka hangarua anō. Ka hopukina e te hinu ngā matūriki kore-porowhita mai i te hau e tomo mai ana, ka whakaitihia te uta matūriki o te tātari matūriki hau pēhi. He mea noa te kawe i ētahi hinu pūwero kua mau ki roto i te awa hau pēhi i raro i te pūwero. I roto i te maha o ngā tono, ka whakatikahia tēnei mā ngā oko whakakotahi/tātari. Ko ngā whakamaroke hau pēhi pouaka whakamātao me ngā tātari whakakotahi matao o roto e whakatauria ana kia nui ake te hinu me te wai e tangohia ana i ngā tātari whakakotahi kei raro i ngā whakamaroke hau, nā te mea i muri i te whakamataotanga o te hau me te tango i te makuku, ka whakamahia te hau matao hei whakamatao i mua i te hau wera e tomo mai ana, e whakamahana ana i te hau e wehe atu ana. I roto i ētahi atu tono, ka whakatikahia tēnei mā te whakamahi i ngā tāke kaiwhiwhi e whakaiti ana i te tere ā-rohe o te hau pēhi, e tuku ana i te hinu kia whakakōpikopiko me te maturuturu i waho o te awa hau kia tangohia mai i te pūnaha hau pēhi mā ngā taputapu whakahaere-whakakōpikopiko.
Ka whakamahia ngā pūwero tīwiri-hurihuri i werohia ki te hinu i roto i ngā mahi e manawanui ana ki te iti o te poke o te hinu, pērā i te mahi taputapu hau, te hiri i ngā pakaru, me te ratonga potae neke. Ka tukuna e ngā pūwero hau tīwiri hou kua waipukehia ki te hinu te iti iho i te 5mg/m3 o te hinu e toe ana. Ko te hinu PAG he polyalkylene glycol e kiia ana ko te polyglycol. Ka whakamahia ngā hinu whakahinuhinu PAG e ngā OEM pūwero hau nui rawa atu e rua o te US i roto i ngā pūwero hau tīwiri hurihuri. Kāore ngā pūwero hinu-hurihuri PAG e whakamahia ana hei rehu peita, nā te mea ka whakarewahia e te hinu PAG ngā peita. He ātete ngā peita kapia epoxy e rua-wāhanga e whakapakeke ana i te tauhohenga ki te hinu PAG. Kāore ngā pūwero PAG i te pai mō ngā mahi he hiri kua pania ki ngā hinu hinu kohuke, pērā i ngā takirere 4-ara me ngā rango hau e mahi ana me te kore he hinu hinu kohuke, nā te mea ka horoia e te PAG te hinu kohuke ka whakaiti i te rapa Buna-N.
Wā tuku: Whiringa-ā-rangi 14-2019