Naluphi na uphando lwe-intanethi olukhawulezayo lwe-valve luya kubonisa iziphumo ezininzi ezahlukeneyo: i-manual okanye ngokuzenzekelayo, ubhedu okanye insimbi engenasici, i-flanged okanye i-NPT, isiqwenga esinye, iziqwenga ezimbini okanye ezintathu, njalo njalo. Ngeentlobo ezininzi zeevalvu onokukhetha kuzo, unokuqiniseka njani ukuba uthenga uhlobo olululo? Ngelixa isicelo sakho siya kukunceda ekukhetheni ivalve efanelekileyo, kubalulekile ukuba ube nokuqonda okusisiseko kweentlobo ezahlukeneyo zeevalvu ezinikezelwayo.

Ivalve yebhola enye inomzimba otyhidiweyo oqinileyo onciphisa umngcipheko wokuvuza. Amaxabiso aphantsi kwaye aqhelekanga ukulungiswa.

Iivalve zebhola ezinamaqhekeza amabini zezinye zezona ziqhelekileyo zisetyenziswaiivalve zebhola. Njengoko igama libonisa, ivalve yebhola enamacandelo amabini ineziqwenga ezibini, isiqwenga esineqhekeza elidityaniswe kwelinye icala kunye nomzimba wevalve. Isiqwenga sesibini sihambelana nesiqwenga sokuqala, sibambe i-trim kwindawo kwaye siquka uxhulumaniso lwesibini lokugqibela. Nje ukuba zifakwe, ezi valves azinakulungiswa ngokubanzi ngaphandle kokuba zikhutshiwe ekusebenzeni.

Kwakhona, njengoko igama libonisa, ivalve yebhola eneziqwenga ezintathu inamacandelo amathathu: ii-caps ezimbini kunye nomzimba. Iingqungquthela zokuphela zivame ukuxutywa okanye zifakwe kwipayipi, kwaye inxalenye yomzimba inokususwa ngokulula ukucoca okanye ukulungiswa ngaphandle kokususa i-cap end. Oku kunokuba lukhetho oluxabiseke kakhulu njengoko luthintela umgca wemveliso ekubeni uvaliwe xa kufuneka ulondolozo.

Ngokuthelekisa iimpawu zevalve nganye kunye neemfuno zakho zesicelo, uya kukwazi ukwenza isigqibo esinolwazi esilungele iimfuno zakho. Ndwendwela iwebhusayithi yethu yevalvu ukuze ufunde malunga nomgca wemveliso yevalve yebhola okanye uqalise ukuqwalasela namhlanje.

Ukuvezwa kwe-UV
MhlopheUmbhobho wePVC,uhlobo olusetyenziselwa imibhobho yamanzi, luqhekeka xa luvezwe kukukhanya kwe-UV, njengokuvela elangeni. Oku kwenza ukuba izinto eziphathekayo zingafanelekanga kwizicelo zangaphandle apho zingayi kugqunywa khona, njengeeflegi kunye nezicelo zokuphahla. Ngokuhamba kwexesha, ukuvezwa kwe-UV kunciphisa ukuguquguquka kwezinto ngokuthotywa kwepolymer, okunokukhokelela ekuqhekekeni, ekuqhekekeni, nasekuqhekekeni.

ubushushu obuphantsi
Njengoko iqondo lobushushu liyehla, iPVC iya iba brittle ngakumbi. Xa ibekwe kubushushu obuqhaqhazelisa amazinyo kangangexesha elide, iba rhabaxa kwaye iqhekeke lula. I-PVC ayifanelekanga kwizicelo ezixhomekeke kwiqondo lokushisa elingaguqukiyo, kwaye amanzi akufuneki abe ngumkhenkce ngaphakathiImibhobho yePVCnjengoko kunokubangela ukuqhekeka kunye nokugqabhuka.

ubudala
Zonke iipholima okanye iiplastiki zithotywa kwinqanaba elithile ngokuhamba kwexesha. Yimveliso yokwakheka kweekhemikhali zabo. Ngokuhamba kwexesha, i-PVC ifunxa izinto ezibizwa ngokuba yi-plasticizers. IiPlastiki zongezwa kwiPVC ngexesha lokwenziwa ukunyusa ukuguquguquka kwayo. Xa befuduka kwimibhobho ye-PVC, imibhobho ayinakuguquguquka kuphela ngenxa yokungabikho kwayo, kodwa ishiywe ineziphene ngenxa yokungabikho kweemolekyuli ze-plasticizer, ezinokuthi zenze iintanda okanye i-fissures kwimibhobho.

ukuvezwa kweekhemikhali
Imibhobho yePVC inokuba brittle ngenxa yokutyhileka kweekhemikhali. Njengepolymer, iikhemikhali zinokuba nefuthe elibi kakhulu ekwenziweni kwePVC, ukukhulula amabhondi phakathi kweemolekyuli zeplastiki kunye nokukhawulezisa ukufuduka kweeplasticizers ngaphandle kwemibhobho. Imibhobho yokukhupha i-PVC inokuba brittle ukuba ibekwe kwizixa ezikhulu zeekhemikhali, ezifana nezo zifunyenwe kwizisusi zeplagi zolwelo.