No ka hoʻohana pono ʻana i ka PTFE ma kahi axial split case pump , he mea nui e hoomaopopo i na waiwai o keia mea. ʻO kekahi o nā waiwai kūʻokoʻa o ka PTFE e lilo ia i mea maikaʻi loa no ka hoʻopili ʻana i ka braided:

1. Paipai kemika maikaʻi. ʻO ke kumu nui o ka hoʻohana ʻana i ka PTFE i ka paʻi ʻana, ʻaʻole i hoʻopilikia ʻia e nā ʻano wai corrosive like ʻole, me nā waikawa ikaika, nā kumu, a me nā solvents. ʻO ka mea nui paha, hiki i ka PTFE ke kū i nā mea hoʻoheheʻe ikaika e like me ka waikawa nitric, chlorine dioxide, a me ka sulfuric acid (oleum).

2. Ka helu haʻahaʻa o ka friction ke hoʻopili ʻia me ka hapa nui o nā ʻili. Ua ʻike ʻia ʻo PTFE me ka ʻole o ka pulu, ʻoluʻolu, a me ka coefficient haʻahaʻa o nā waiwai friction. Kōkua kēia i ka hōʻemi ʻana i ka hoʻohana ʻana i ka mana a me ka hana wela ma ke kikowaena packing-shaft.

ʻOiai loaʻa iā PTFE kāna mau mea maikaʻi, ʻaʻole kūpono kekahi o kāna mau waiwai i ka nui o nā noi hoʻopili pahū. ʻO nā pilikia i loaʻa me ka hoʻopili ʻana o PTFE ma muli o kāna mau waiwai wela a me nā mechanical.

1. ʻO ke anu anuanu a kolo paha ma lalo o ke kaomi. Piʻi ka kolo me ka piʻi ʻana o ka mahana. Ke hoʻopili ʻia ke kaomi i ka 100% PTFE packing no kekahi manawa, hiki ke lilo ka paʻi i mea paʻa paʻa a koi i nā hoʻololi pinepine e mālama i kahi sila. Loaʻa iā ia ka manaʻo e ʻomi i nā āpau o luna a me lalo o ka pahu meaʻai o a axial split case pump.

2. Haʻahaʻa thermal conductivity. Ke hoʻoulu ʻia ka wela frictional i ka hoʻopili ʻana me kahi kiʻekiʻe kiʻekiʻe-wikiwiki huli ʻana, maʻemaʻe ka PTFE i ka manaʻo e komo i ka wela a ʻaʻole hiki ke hoʻokuʻu iā ia i ke kaiapuni a puni. No ka pale ʻana i ka PTFE paʻi ʻana mai ke ahi a i ʻole ka wela, pono ka nui o ka leakage kiʻekiʻe ma ka ʻili o ka packing-shaft.

3. Kiʻekiʻe thermal hoʻonui koena. I ka piʻi ʻana o ka mahana, hoʻonui ʻia ka PTFE ma mua o ka metala a puni. Hoʻonui kēia hoʻonui i ke kaomi o ka paʻi ʻana ma ka axial split case pump shaft and bore.

PTFE Fiber Packing

Nui nā mea hana e hoʻopuka i ka packing e hoʻohana ana i ka PTFE ma ke ʻano he fiber kumu. Hiki ke hāʻawi ʻia kēia mau huahana e like me nā pulu maloʻo, nā fibers i uhi ʻia me nā dispersions PTFE, a i ʻole nā ​​fibers i uhi ʻia me nā lubricants like ʻole. He hana maikaʻi ka hoʻohana ʻana i kēia mau huahana inā ʻaʻohe ʻano PTFE ʻē aʻe, me nā noi me nā kemika corrosive e like me nā oxidizer ikaika, a i ʻole no ka meaʻai a i ʻole ka hana lāʻau lapaʻau.

No ka PTFE fiber packing, he mea nui e pili i nā palena o ka mea hana i ka mahana, ka wikiwiki, a me ke kaomi. He mea maʻalahi kēia mau paʻi i ka hoʻoponopono ʻana i ka wā e hoʻohana ʻia ai i nā mea wili. ʻO ka mea maʻamau, koi ʻia nā kaomi haʻahaʻa haʻahaʻa a me ka nui o ka leakage ma mua o nā ʻeke ʻē aʻe.

Hoʻonui ʻia ka Polytetrafluoroethylene (ePTFE).

ʻO nā wili ePTFE ke ʻano like me ka ʻeha PTFE tape. ʻO ke ʻano maʻamau ka ePTFE i hoʻopili ʻia me ka graphite e hoʻomaikaʻi i kāna conductivity thermal a me ka helu wikiwiki. ʻOi aku ka liʻiliʻi o nā braids ePTFE i ke kūkulu ʻana i ka wela ma mua o ka PTFE fiber packing. Hiki i ka ePTFE packing ke loaʻa i ka deformation anu a me ka extrusion i nā kaomi kiʻekiʻe.

Hoʻopili ʻia ʻo PTFE i uhi ʻia

Ke koi ʻole ʻia ke kūpaʻa kemika maikaʻi loa o ka PTFE maʻemaʻe, hiki ke uhi ʻia ka PTFE i nā mea fiber he nui e hoʻomaikaʻi ai i ka hana packing a hoʻohana i nā pono o ka PTFE. Hiki i kēia mau fiber ke kōkua i ka hōʻemi a i ʻole ka hoʻopau ʻana i kekahi o nā nāwaliwali o nā braids PTFE maʻemaʻe.

Hiki ke uhi ʻia nā wili synthetic a me ke aniani i hui pū ʻia me ka PTFE e hana i ka hoʻokele waiwai a me ka hoʻopili ʻana i ʻoi aku ka kiʻekiʻe o ke kūpaʻa, ʻoi aku ka pale extrusion, a me ka liʻiliʻi o ke kani ʻana ma mua o ka PTFE fiber braids. Hiki iā lākou ke uhi ʻia me kahi dispersed blend o PTFE a me ka graphite e hoʻomaikaʻi hou i ka hiki ke wikiwiki o ka braid a me nā hiʻohiʻona wela.

Hiki ke hoʻohana ʻia ka hoʻopili ʻana o ka fiber Aramid me nā uhi PTFE i kahi e koi ʻia ai ke kūpaʻa paʻa. Hiki ke hoʻohana ʻia ʻo Novoid fiber packing me ka uhi PTFE i nā lawelawe corrosive haʻahaʻa a ʻoi aku ka maikaʻi o ke kūpaʻa a me ke kūpaʻa extrusion ma mua o ka PTFE fiber braids.

ʻO ka PTFE-coated carbon a me ka graphite fiber braids i waena o ka hoʻopili ʻoi loa. Loaʻa iā lākou ke kūpaʻa kemika maikaʻi loa (koe wale nā ​​​​mea hoʻoheheʻe ikaika), ka wikiwiki wikiwiki, ka hana wela kiʻekiʻe, a me ke kūpaʻa maikaʻi loa. ʻAʻole lākou makemake e palupalu a extrude i nā wela kiʻekiʻe a hōʻike pū i ke kūpaʻa abrasion maikaʻi.

Ma ka hoʻomaopopo ʻana i nā pōmaikaʻi a me nā palena o nā ʻano like ʻole o ka hoʻopaʻa ʻana i ka PTFE i hoʻopaʻa ʻia, hiki iā ʻoe ke koho i ka huahana e hoʻokō pono ai i kāu axial split case pump a i ʻole kaʻina hana valve sealing koi.