Uyazibuza ukuthi i-valve ye-PVC ingakwazi yini ukuphatha ukucindezela kwesistimu yakho? Iphutha lingaholela ekuqhumeni okumba eqolo kanye nesikhathi sokuphumula. Ukwazi umkhawulo oqondile wengcindezi kuyisinyathelo sokuqala sokufakwa okuphephile.

Amavalvu amaningi ebhola e-PVC akalelwe ukucindezela okukhulu okungu-150 PSI (Amakhilogremu nge-Inch yesikwele) ezingeni lokushisa elingu-73°F (23°C). Lesi silinganiso siyehla njengoba usayizi wepayipi nezinga lokushisa elisebenzayo likhuphuka, ngakho hlala uhlola imininingwane yomkhiqizi.

Ngikhumbula ingxoxo noBudi, umphathi wokuthenga e-Indonesia othenga izinkulungwane zamavalvu kithi. Wangishayela ucingo ngolunye usuku, ekhathazekile. Elinye lamakhasimende akhe, ongusonkontileka, lishayeke ivalvu lapho lifaka i-valve entsha. Isithunzi sakhe sase sisengozini. Lapho siphenya, sithole ukuthi isistimu ibisebenza ngokuphakama kancaneizinga lokushisakunokujwayelekile, okwakwanele ukwehlisa ukusebenza kwe-valveisilinganiso sokucindezelangaphansi kwalokho okudingwa yisistimu. Bekuwukwengamela okulula, kodwa kwagqamisa iphuzu elibalulekile: inombolo ephrintwe kuvalvu akuyona yonke indaba. Ukuqonda ubudlelwano phakathi kwengcindezi, izinga lokushisa, nosayizi kubalulekile kunoma ubani othola noma ofaka lezi zingxenye.

Ingakanani ingcindezi engaphathwa yivalvu yebhola ye-PVC?

Ubona isilinganiso sokucindezela, kodwa awunasiqiniseko sokuthi sisebenza yini esimweni sakho esithile. Ukuthatha ukuthi inombolo eyodwa ilingana nawo wonke amasayizi namazinga okushisa kungaholela ekuhlulekeni okungalindelekile nokuvuza.

I-valve yebhola ye-PVC ngokuvamile ingakwazi ukuphatha i-PSI engu-150, kodwa lena i-Cold Working Pressure yayo (CWP). Ingcindezi yangempela engakwazi ukuyiphatha yehla kakhulu njengoba izinga lokushisa loketshezi likhuphuka. Isibonelo, ku-140°F (60°C), isilinganiso sokucindezela singanqanyulwa sibe uhhafu.

Isici esibalulekile okufanele siqonde lapha yilokho esikubiza ngokuthi “ijika lokunciphisa isilinganiso sokucindezela.” Itemu lobuchwepheshe lombono olula: njengoba i-PVC iqala ukufudumala, iya ithambile futhi ibe buthakathaka Ngenxa yalokhu, kufanele usebenzise ingcindezi encane ukuze uyigcine iphephileI-valve ye-PVCisebenza ngendlela efanayo. Abakhiqizi bahlinzeka ngamashadi akubonisa kahle ukuthi ingakanani ingcindezi i-valve engakwazi ukuyisingatha emazingeni okushisa ahlukene. Njengomthetho wesithupha, kukho konke ukukhuphuka okungu-10°F ngaphezu kwezinga lokushisa elizungezile (73°F), kufanele wehlise ukucindezela okuphezulu okuvunyelwe cishe ngo-10-15%. Yingakho ukuthola kumkhiqizi ohlinzeka ngokusobalaidatha yobuchwephesheibaluleke kakhulu kochwepheshe abafana noBudi.

Ukuqonda Izinga Lokushisa Nosayizi Wobudlelwano

Ngaphezu kwalokho, ama-valve amakhulu obubanzi ngokuvamile anesilinganiso sokucindezela esiphansi kunamancane, ngisho nasezingeni lokushisa elifanayo. Lokhu kungenxa ye-physics; indawo engaphezulu yebhola kanye ne-valve yomzimba isho ukuthi amandla aphelele akhishwa ukucindezela makhulu kakhulu. Njalo hlola isilinganiso esithile sosayizi othize owuthengayo.

Uyini umkhawulo wokucindezela wevalvu yebhola?

Uyawazi umkhawulo wokucindezela we-PVC, kodwa lokho kuqhathaniswa kanjani nezinye izinketho? Ukukhetha izinto ezingalungile ngomsebenzi onengcindezi enkulu kungaba yiphutha elibizayo, noma eliyingozi.

Umkhawulo wokucindezela we-valve yebhola uncike ngokuphelele ezintweni zayo. Amavalvu e-PVC awezinhlelo zokucindezela okuphansi (cishe ku-150 PSI), amavalvu ethusi awengcindezi ephakathi (kufika ku-600 PSI), namavalvu ensimbi engagqwali awezinhlelo zokucindezela okukhulu, ngokuvamile ezedlula i-PSI engu-1000.

Lena ingxoxo engivame ukuba nayo nabaphathi bokuthenga abafana no-Budi. Nakuba ibhizinisi lakhe eliyinhloko liku-PVC, amakhasimende akhe ngezinye izikhathi anamaphrojekthi akhethekile adingaukusebenza okuphezulu. Ukuqonda yonke imakethe kumsiza ukuthi akhonze amakhasimende akhe kangcono. Akagcini ngokuthengisa umkhiqizo; unikeza ikhambi. Uma usonkontileka esebenza kulayini wokunisela ojwayelekile, i-PVC ilungile,ukukhetha okungabizi kakhulu. Kodwa uma lowo sonkontileka esebenza endaweni ehambisa amanzi anengcindezi ephezulu noma isistimu enamazinga okushisa aphezulu, uBudi uyakwazi ukuncoma enye indlela yensimbi. Lolu lwazi lumenza abe uchwepheshe futhi lwakhe ukwethenjwa isikhathi eside. Akukhona mayelana ukuthengisa valve eqolo, kodwakwesokudlai-valve yomsebenzi.

Ukuqhathanisa Izinto Ezivamile Zevalvu Yebhola

Ukukhetha okulungile kuhlala kwehlela ezidingweni zohlelo lokusebenza: ingcindezi, izinga lokushisa, kanye nohlobo loketshezi olulawulwayo.

Njengoba ubona, izinsimbi ezifana nethusi nensimbi engagqwali zinamandla amakhulu kakhulu okudonsa kune-PVC. Lawa mandla emvelo awavumela ukuthi aqukathe izingcindezi eziphakeme kakhulu ngaphandle kwengozi yokuqhuma. Nakuba ziza ngezindleko eziphakeme, ziyisinqumo esiphephile nesidingekayo lapho izingcindezi zesistimu zidlula imingcele ye-PVC.

Iyini ingcindezi yomoya ephezulu ye-PVC?

Ungase ulingeke ukusebenzisa i-PVC ethengekayo umugqa womoya ocindezelweyo. Lona umbono ovamile kodwa oyingozi kakhulu. Ukwehluleka lapha akukhona ukuvuza; ukuqhuma.

Akufanele neze usebenzise amavalvu ebhola e-PVC ajwayelekile noma amapayipi omoya ocindezelwe nanoma iyiphi enye igesi. Ukucindezela komoya okuphezulu okunconyiwe kunguziro. Igesi enomfutho igcina amandla amakhulu, futhi uma i-PVC ihluleka, ingaphahlazeka ibe ama-projectile abukhali, ayingozi.

Lesi isexwayiso esibaluleke kakhulu sokuphepha engisinika ozakwethu, futhi into engigcizelela ethimbeni likaBudi ukuze liziqeqeshe. Ingozi ayiqondwa kahle yiwo wonke umuntu. Isizathu siwumehluko obalulekile phakathi koketshezi namagesi. Uketshezi olunjengamanzi alucindezeli. Uma ipayipi le-PVC eliphethe amanzi liqhekeka, ukucindezela kwehla ngokushesha, futhi uthola ukuvuza okulula noma ukuhlukana. Nokho, igesi icindezela kakhulu. Kufana nesiphethu esigciniwe. Uma ipayipi le-PVC eliphethe umoya ocindezelwe lihluleka, wonke lawo mandla agciniwe akhululwa ngesikhathi esisodwa, okubangela ukuqhuma okunamandla. Ipayipi alimane liqhekeke; kuyaphahlazeka. Ngizibonile izithombe zomonakalo ongadalwa yilokhu, futhi kuyingcuphe okungekho muntu okufanele ayithathe.

I-Hydrostatic vs. Pneumatic Pressure Failure

Ingozi ivela ohlotsheni lwamandla agcinwe ohlelweni.

• I-Hydrostatic Pressure (Amanzi):Amanzi awaminyanisi kalula. Uma isiqukathi esiphethe amanzi sihluleka, ukucindezela kukhululeka ngokushesha. Umphumela uba ukuvuza. Amandla ashabalala ngokushesha futhi ngokuphepha.
• I-Pneumatic Pressure (Umoya/Igesi):I-gas compresses, igcina inani elikhulu lamandla angaba khona. Lapho isitsha sihluleka, la mandla akhululwa ngokuqhuma. Ukwehluleka kuyinhlekelele, hhayi kancane kancane. Yingakho izinhlangano ezifana ne-OSHA (Occupational Safety and Health Administration) zinemithetho eqinile emelene nokusebenzisa i-PVC evamile yomoya ocindezelwe.

Ngezinhlelo zokusebenza zomoya, hlala sebenzisa izinto ezidizayinelwe ngokukhethekile futhi zikalwe amagesi acindezelwe, njengethusi, insimbi, noma amapulasitiki akhethekile aklanyelwe leyo njongo. Ungalokothi usebenzise i-PVC yebanga lamapayipi.

Siyini isilinganiso sokucindezela se-valve yebhola?

Une-valve esandleni sakho, kodwa udinga ukwazi isilinganiso sayo esiqondile. Ukungafundi kahle noma ukungazinaki izimpawu emzimbeni kungaholela ekusebenziseni ivalvu engaphansi ohlelweni olubucayi.

Isilinganiso sokucindezela siyinani eligxivizwe ngqo emzimbeni wevalvu yebhola. Ivamise ukubonisa inombolo elandelwa yi-“PSI” noma “PN,” emele ubuningi be-Cold Working Pressure (CWP) ezingeni lokushisa elizungezile, ngokuvamile elingu-73°F (23°C).

Ngihlale ngikhuthaza ozakwethu ukuthi baqeqeshe abasebenzi babo bendawo yokugcina impahla kanye nabathengisayo ukuthi bafunde lezi zimpawu ngendlela efanele. “Ikhadi le-ID” levalvu. Uma ithimba lika-Budi lehlisa ukuthunyelwa, lingaqinisekisa ngokushesha ukuthi likutholileimininingwane efanele yomkhiqizo. Lapho abathengisi bakhe bekhuluma nosonkontileka, bangakhomba ngokoqobo isilinganiso esikuvalvu ukuze baqinisekise ukuthi sihlangabezana nezidingo zephrojekthi. Lesi sinyathelo esilula sisusa noma yikuphi ukuqagela futhi sivimbela amaphutha ngaphambi kokuba i-valve ifike endaweni yomsebenzi. Izimpawu ziyisithembiso esivela kumkhiqizi mayelana namakhono okusebenza kwamavalvu, futhi ukuwaqonda kubalulekile ekusebenziseni umkhiqizo ngokuphepha nangempumelelo. Kuyimininingwane encane eyenza umehluko omkhulu ekuqinisekiseniukulawulwa kwekhwalithi kulo lonke uchungechunge lokuhlinzeka.

Ifundwa Kanjani Izimpawu

Amavaluvu asebenzisa amakhodi amisiwe ukuze akhulume nemikhawulo yawo. Nazi ezivame kakhulu ozothola ku-valve yebhola ye-PVC:

Ngokwesibonelo, ungase ubone“150 PSI @ 73°F”. Lokhu kucace kakhulu: 150 PSI ingcindezi enkulu, kodwa kuphela ku-73°F noma ngaphansi. Ungase futhi ubone"PN10". Lokhu kusho ukuthi i-valve ikalelwe ukucindezela okuzisholo kwe-10 Bar. Njengoba Ibha engu-1 icishe ibe ngu-14.5 PSI, ivalvu ye-PN10 icishe ilingane nevalvu engu-145 PSI. Ngaso sonke isikhathi bheka kokubili inombolo yokucindezela kanye nanoma yisiphi isilinganiso sezinga lokushisa esihlobene ukuze uthole isithombe esigcwele.

Isiphetho

Umkhawulo wengcindezi yevalvu yebhola ye-PVC ngokuvamile ngu-150 PSI wamanzi, kodwa lesi silinganiso sehla ngokushisa. Okubaluleke kakhulu, ungalokothi usebenzise i-PVC kumasistimu omoya acindezelwe.