O le valve palasitika o se ituaiga faʻaoga lautele o le valve, e iai le lelei o le faʻafefeteina o le corrosion, mama mama, faʻaofuofu teteʻe, ma isi E faʻaaogaina lautele i vailaʻau, petrochemical, puipuiga o le siosiomaga ma isi pisinisi.O lo'o ta'ua i lalo le tala'aga o le atina'eina o valve palasitika.
I le 1950s, faʻatasi ai ma le televave o atinaʻe o vailaʻau vailaʻau, o le manaʻoga mo valve na faasolosolo malie lava.I le taimi nei, o mea palasitika ua faʻaaogaina lautele i le fale gaosi oloa, o lea na amata ai ona suʻesuʻe e nisi o inisinia pe faʻapefea ona faʻaogaina mea palasitika i le gaosiga o valve.O alalaupapa palasitika muamua na masani ona gaosia e faʻaaoga ai le polyvinyl chloride (PVC) mea, lea e lelei le faʻafefeteina, ae o ona mea faʻainisinia e le lelei ma e talafeagai mo le maualalo o le mamafa ma le vevela o le siosiomaga faigaluega.
I le vaitau o le 1960, faʻatasi ai ma le faʻaauauina o le atinaʻeina o tekinolosi faʻapipiʻi, polypropylene (PP), polytetrafluoroethylene (PTFE) ma isi mea na faʻaaogaina i le gaosiga o valve palasitika.O nei mea e sili atu le faʻaogaina o masini ma le pala, ma e mafai ona faʻafetaui i se lautele lautele o siosiomaga faigaluega.
I le 1970s, faatasi ai ma le matua o tekinolosi valve palasitika, na faʻafeiloaʻi ai le tele o vaʻa palasitika fou, e pei ole polyvinyl fluoride (PVDF) valve, tioata tioata, ma isi mea. fa'afetaui i si'osi'omaga faigaluega e sili atu ona faigata.
I le amataga o le 21st seneturi, faatasi ai ma le faʻalauteleina o le faʻalauiloaina o le puipuiga o le siosiomaga, o manaʻoga mo valve ua faʻatupulaia ma maualuga.I le taimi lea, o nisi mea palasitika fou na faʻaaogaina i le gaosiga o valve, e pei o le polyetherketone (PEEK), polyimide (PI) ma isi mea palasitika maualuga.O nei meafaitino e sili atu mea faʻainisinia ma teteʻe o le corrosion, ma e mafai ona faʻafeiloaʻi le sili atu ona faigata le siosiomaga faigaluega.
I se faapuupuuga, faatasi ai ma le atinaʻeina o pisinisi vailaʻau ma le faʻaauauina o le faʻaogaina o tekonolosi palasitika, ua iloa e vaʻa palasitika le atinaʻeina o mea faʻapipiʻi maualuga mai le amataga o mea PVC e oʻo mai i le taimi nei, faʻaleleia pea lo latou faʻafefeteina, mea faʻainisinia ma le lautele o le. talosaga, avea o se meafaigaluega taua ma taua mo vailaau, suauu ma le siosiomaga puipuiga alamanuia.
Taimi meli: Mati-02-2023