Plastic valve imhando yakashandiswa zvikuru yevharuvhu, ine zvakanakira kupesana nekuora, uremu huremu, kupfeka kusagadzikana, etc. Inoshandiswa zvakanyanya mumakemikari, petrochemical, kuchengetedza kwezvakatipoteredza uye mamwe maindasitiri.Izvi zvinotevera nhoroondo yekuvandudza yepurasitiki mavharuvhu.
Muma1950, nekukurumidza kukura kweindasitiri yemakemikari, kudiwa kwemavharuvhu kwakawedzera zvishoma nezvishoma.Panguva ino, zvigadzirwa zvepurasitiki zvakashandiswa zvakanyanya mundima yeindasitiri, saka vamwe mainjiniya vakatanga kudzidza mashandisiro epurasitiki zvinhu mukugadzira mavharuvhu.Mavharuvhu epurasitiki ekutanga ainyanya kugadzirwa achishandisa polyvinyl chloride (PVC) zvinhu, izvo zvine kunaka kwekusagadzikana, asi mashandiro ayo emuchina haana kunaka uye anokodzera kudzvinyirira kwakaderera uye tembiricha yekushanda.
Mumakore ekuma1960, nekuenderera mberi kwekugadzirwa kwepurasitiki teknolojia, polypropylene (PP), polytetrafluoroethylene (PTFE) uye zvimwe zvinhu zvakashandiswa mukugadzira mavharuvhu epurasitiki.Zvishandiso izvi zvine mashandiro arinani emuchina uye corrosion resistance, uye zvinogona kuenderana nehupamhi hwenzvimbo dzekushanda.
Mumakore ekuma1970, nekukura kwehunyanzvi hwekugadzira mavharuvhu epurasitiki, mavharuvhu epurasitiki matsva akasiyana-siyana akaunzwa, akadai semavharuvhu epolyvinyl fluoride (PVDF), mavharuvhu esimbi, etc. kujairana nemamiriro ekushanda anodiwa.
Pakutanga kwezana remakore rechi21, nekuwedzera kwekuziva kwekuchengetedzwa kwezvakatipoteredza, zvinodiwa zvemavharuvhu zviri kuwedzera uye zvakakwirira.Panguva ino, zvimwe zvinhu zvitsva zvepurasitiki zvakashandiswa mukugadzira mavharuvhu, akadai sepolyetherketone (PEEK), polyimide (PI) uye mamwe mapurasitiki epamusoro-soro.Izvi zvinhu zvine zvirinani zvemichina uye corrosion kuramba, uye zvinogona kusangana neinoda nharaunda yekushanda.
Muchidimbu, nekuvandudzwa kweindasitiri yemakemikari uye kuenderera mberi kwehunyanzvi hwemapurasitiki tekinoroji, mavharuvhu epurasitiki akawana kuvandudzwa kwezvigadzirwa zvepurasitiki zvemhando yepamusoro kubva kuzvinhu zvePVC zvekutanga kusvika parizvino, zvichiramba zvichivandudza kusaora kwadzo, mashandiro emagetsi uye hukuru hwe. kunyorera, kuve yakakosha uye yakakosha midziyo yemakemikari, petrochemical uye kuchengetedza kwezvakatipoteredza maindasitiri.
Nguva yekutumira: Mar-02-2023