Kunyange zvazvo mavharuvhu epurasitiki dzimwe nguva achionekwa sechigadzirwa chakakosha-chisarudzo chepamusoro cheavo vanogadzira kana kugadzira zvigadzirwa zvepombi zvepurasitiki zvemasisitimu eindasitiri kana kuti vanofanirwa kuve nemidziyo yakachena kwazvo munzvimbo-vachifunga kuti mavharuvhu aya haana zvakawanda zvekushandisa ipfupi- kuona. Muchokwadi, mavharuvhu epurasitiki nhasi ane huwandu hwakasiyana hwekushandisa sezvo marudzi ari kuwedzera emidziyo uye vagadziri vakanaka vanoda izvo zvinhu zvinoreva nzira dzakawanda dzekushandisa zvishandiso izvi zvakasiyana.
PASTIC'S PROPERTIES
Zvakanakira zve thermoplastic valves zvakakura-kuora, makemikari uye abrasion resistance; yakatsetseka mukati memadziro; uremu huremu; nyore kuisa; kurarama kwenguva refu; uye mutengo wakaderera wehupenyu. Izvi zvakanakira zvakakonzera kugamuchirwa kwakakura kwemavharuvhu epurasitiki mune zvekutengesa uye maindasitiri mafomu sekugovera mvura, marara emvura, simbi uye makemikari kugadzirisa, chikafu nemishonga, zvidyarwa zvemagetsi, mafuta ekunatsa uye nezvimwe.
Mavharuvhu epurasitiki anogona kugadzirwa kubva kune akati wandei akasiyana zvinhu zvinoshandiswa mune akati wandei magadzirirwo. Mavharuvhu anonyanyozivikanwa ethermoplastic anogadzirwa ne polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), uye polyvinylidene fluoride (PVDF). PVC neCPVC mavharuvhu anowanzo kubatanidzwa kune pombi masisitimu ne solvent cementing socket ends, kana shinda uye flanged magumo; nepo, PP nePVDF inoda kujoinwa kwepiping system zvikamu, kungave nekupisa-, butt- kana electro-fusion matekinoroji.
Mavharuvhu eThermoplastic anokunda munzvimbo dzinoita ngura, asi anongobatsirawo musevhisi yemvura yakajairika nekuti haana lead-1, anodzivirira dezincification uye haaite ngura. PVC neCPVC pombi masisitimu nemavharuvhu zvinofanirwa kuyedzwa nekupihwa zvitupa kuNSF [National Sanitation Foundation] chiyero 61 chemhedzisiro yehutano, kusanganisira iyo yakaderera lead inodiwa yeAnnex G. Kusarudza zvinhu zvakakodzera zvemvura inoparadza inogona kubatwa nekubvunza mugadziri makemikari kuramba. tungamira uye kunzwisisa mhedzisiro iyo tembiricha ichave nayo pane epurasitiki zvinhu 'simba.
Kunyange zvazvo polypropylene ine hafu yesimba rePVC neCPVC, ine makemikari akawanda anopikisa nokuti hapana zvinonyungudutsa zvinozivikanwa. PP inoita zvakanaka muconcentrated acetic acids uye hydroxides, uye inokodzerawo zvinyoro zvigadziriso zveakawanda acid, alkalis, munyu uye akawanda organic makemikari.
PP inowanikwa seine pigmented kana isina pigmented (yakasikwa) zvinhu. Natural PP yakashatiswa zvakanyanya neultraviolet (UV) mwaranzi, asi makomisheni ane anopfuura 2.5% kabhoni dema pigmentation ane UV yakagadzikana zvakakwana.
Nekuti thermoplastics inonzwa tembiricha, kudzvanywa kwevharuvhu kunoderera sezvo tembiricha inokwira. Zvigadzirwa zvepurasitiki zvakasiyana zvine deration inoenderana nekuwedzera tembiricha. Fluid tembiricha inogona kunge isiri iyo yega yekupisa sosi inogona kukanganisa epurasitiki mavharuvhu 'kudzvanywa rating-yepamusoro yekunze tembiricha inoda kuve chikamu chekufunga nezvekugadzira. Mune zvimwe zviitiko, kusagadzira pombi yekunze tembiricha kunogona kukonzera kuderera zvakanyanya nekuda kwekushaikwa kwepombi zvinotsigira. PVC ine tembiricha yepamusoro yebasa ye140°F; CPVC ine huwandu hwe220 ° F; PP inokwana 180°F.
Mavharuvhu ebhora, mavharuvhu echeki, mavharuvhu eshavishavi uye mavharuvhu ediaphragm anowanikwa mune imwe neimwe yemhando dzakasiyana dzethermoplastic yehurongwa makumi masere ekumanikidza pombi masisitimu ayo anewo akawanda e trim sarudzo nemidziyo. Iyo yakajairwa bhora vharafu inonyanya kuwanikwa seyechokwadi mubatanidzwa dhizaini kuti ifambise kubviswa kwevharuvhu kwekugadzirisa pasina kukanganisa kwekubatanidza pombi. Thermoplastic cheki mavharuvhu anowanikwa sebhora cheki, swing cheki, y-cheki uye cone cheki. Butterfly mavharuvhu anobatana nyore nesimbi flanges nekuti anopindirana nemabhoti maburi, mabhaudhi madenderedzwa uye mativi ese eANSI Kirasi 150. Iyo yakatsetseka mukati medhayamita yezvikamu zve thermoplastic inongowedzera kukutonga chaiko kwemavharuvhu e diaphragm.
Mavharuvhu ebhora muPVC neCPVC anogadzirwa nemakambani akati wandei eUS nevekunze muhukuru 1/2 inch kuburikidza 6 inches ane socket, threaded kana flanged. Iyo yechokwadi mubatanidzwa dhizaini yemazuva ano bhora mavharuvhu anosanganisira nzungu mbiri dzinokaruka pamuviri, kumanikidza elastomeric zvisimbiso pakati pemuviri nemagumo ekubatanidza. Vamwe vagadziri vakachengeta vharafu imwechete yekuisa kureba uye shinda dzenzungu kwemakumi emakore kuti zvibvumire kutsiva nyore kwemavharuvhu ekare pasina kugadziridzwa kune inobatana pombi.
Kuiswa kwepurasitiki butterfly valve kwakatwasanuka nekuti mavharuvhu aya anogadzirwa kuti ave wafer style ine elastomeric seals yakagadzirirwa mumuviri. Havadi kuwedzerwa kwegasket. Yakagadzika pakati pemafurange maviri ekukwirana, kubhaurirwa pasi kwevharuvhu yeshavishavi repurasitiki kunofanirwa kubatwa zvine hungwaru nekukwira kusvika kune yakakurudzirwa bhaudhi torque mumatanho matatu. Izvi zvinoitirwa kuve nechokwadi chekusimbisa chisimbiso chepamusoro uye kuti hapana kusaenzana kwema mechanical kusagadzikana kunoshandiswa pavhavha.
Nguva yekutumira: Zvita-24-2019 