I-TWS Backflow Preventor

Umthethomgomo wokusebenza we-Backflow Preventor

Isivimbeli sokubuyela emuva kwe-TWSsisisetjenziswa somtjhini esenzelwe ukukhandela ukugeleza okubuyela emuva kwamanzi angcolileko nofana eminye imidiya ehlelweni lokuphakelwa kwamanzi wokusela nofana ihlelo elihlanzekileko, ukuqinisekisa ukuphepha nokuhlanzeka kwehlelo lokuthoma. Umthetho wayo wokusebenza ngokuyinhloko uthembele ekuhlanganisweni kweamavalvu wokuhlola, iindlela zokuhlukanisa umfutho, begodu kesinye isikhathi amavalvu wokuphumula ukwenza "isithiyo" sokugeleza emuva. Nanzi imininingwana ehlukileko:

I-Valve yokuhlola emibiliIndlela
Inengiiinqabo zokubuyela emuvafaka amavalvu wokuhlola amabili asebenza ngokuzijamela afakwe ngokulandelana. Ivalvu yokuhlola yokuthoma (ukungenaivalvu yokuhlola) ivumela uketshezi bona lugeleze phambili ngaphakathi kwehlelo ngaphasi kweemeko ezijayelekileko kodwana luvale ngokuqinileko nangabe ukugandeleleka okubuyela emuva kwenzeka, okuvimbela ukugeleza okubuyela emuva okuvela ehlangothini eliphasi. Okwesibiliivalvu yokuhlola(isangoivalvu yokuhlola) isebenza njengesithiyo sesibili: nangabe eyokuthomaivalvu yokuhlolaihluleka, eyesibili iyasebenza ukuvimba nanyana ngikuphi ukugeleza okuseleko, okunikela ngesendlalelo sokuvikela esingatlhogekiko.

Ukutjheja umehluko wokugandeleleka
Phakathi kwalaba ababiliamavalvu wokuhlola, kunegumbi lomehluko womfutho (nofana indawo ephakathi). Ngaphasi kokusebenza okujayelekileko, umfutho ohlangothini lokungena (ngaphezulu kwevalvu yokuhlola yokuthoma) uphezulu kunomtjhini osendaweni ephakathi, begodu umfutho ohlangothini oluphakathi uphezulu kunehlangothini lokuphuma (ngezansi kwesibiliivalvu yokuhlola). Izinga lomfutho lo liqinisekisa bona zombili iinvalvu zokuhlola zihlala zivulekile, zivumela ukugeleza okuya phambili.

Nangabe ukugeleza emuva kuseduze (isib., ngebanga lokwehla okuzumako komfutho ophezulu nofana ukukhuphuka komfutho ophansi), ukulingana komfutho kuyaphazamiseka. Ivalvu yokuhlola yokuthoma iyavala ukukhandela ukugeleza emuva ukusuka endaweni ephakathi ukuya ekungeneni. Nangabe i-valve yesibili yokuhlola nayo ithola ukugandeleleka okubuyela emuva, iyavala ukuvimba ukugeleza emuva ukusuka ehlangothini lokuphuma ukuya endaweni ephakathi.

Ukuvuselelwa kwevalvu yokuphumula
Iinvikeli ezinengi zokugeleza emuva zifakwe ivalvu yokuphumula exhunywe endaweni ephakathi. Nangabe zombili iivalvu zokuhlola zihluleka nofana nangabe umfutho endaweni ephakathi udlula umfutho wokungena (okutjengisa ubungozi bokubuyela emuva), ivalvu yokuphumula iyavuleka ukukhipha amanzi angcolileko endaweni ephakathi emoyeni (nofana erherhweni lokukhipha amanzi). Lokhu kuvimbela bona amanzi angcolileko angabuyeli emuva emanzini ahlanzekileko, ukugcina ubuqotho behlelo lokuthoma.

Ukusebenza ngokuzenzakalelako
Ikambiso yoke yenziwa ngokuzenzakalelako, ayitlhogi ukungenelela ngezandla. Idivayisi iphendula ngokuguquguqukako ekuguqukeni komfutho we-fluid kanye nendlela yokugeleza, ukuqinisekisa ukuvikeleka okuragela phambili ekugelezeni emuva ngaphasi kwemibandela yokusebenza ehlukileko.

Iinzuzo zezivimbeli zokugeleza emuva

Iinqabo zokubuyela emuvaidlala indima eqakathekileko ekuvikeleni amahlelo wamanzi, khulukhulu amanzi wokusela, ngokukhandela ukugeleza okubuyela emuva kwemidiya engcolileko nofana engathandekiko. Iinzuzo zabo eziqakathekileko zifaka hlangana:

1. **Ukuvikelwa kwekhwalithi yamanzi**

Inzuzo ekulu kukukhandela ukusilaphazeka hlangana namahlelo wamanzi aselako nemithombo engaphuzwako (isib., amanzi angcolileko webubulo, amanzi wokuthelelela, nofana indle). Lokhu kuqinisekisa bona amanzi wokusela nofana amanzi ahlwengileko ahlale angasilapheleko, ukwehlisa ubungozi bezamaphilo obuhlobene nokusetjenziswa kwamanzi angcolileko.

2. **Ukuthobela imithetho**

Eendaweni ezinengi, iinqabo zokugeleza kwamanzi zigunyazwa makhodi wamapayipi nemithetho yezamaphilo (njengaleyo ebekwe ziinhlangano ezifana ne-EPA nofana iimphathiswa zamanzi zendawo). Ukuzifaka kusiza iinsetjenziswa neenhlelo ukuhlangabezana neemfuneko zomthetho, ukubalekela iinhlawulo nofana ukuvalwa kokusebenza.

3. **Ukungasebenzi nokuthembeka**

Inengiiinqabo zokubuyela emuvaifaka amavalvu wokuhlola amabili kanye nevalvu yokuphumula, okwenza ihlelo lokuphepha elingatlhogekiko. Nangabe enye ingcenye yehluleka, ezinye zisebenza njengesipele, ukwehlisa ubungozi bokubuyela emuva. Idizayini le iqinisekisa ukusebenza okungaguqukiko ngitjho nangaphasi komfutho otjhugulukako nofana ubujamo bokugeleza.

4. **Ubujamo obuhlukahlukeneko kizo zoke iinsetjenziswa**

Ziyakwazi ukutjhuguluka eendaweni ezihlukahlukeneko, okufaka hlangana iindawo zokuhlala, zezokuthengisa, zezebubulo, nezamasipala. Nanyana kusetjenziswa amanethiwekhi wamapayipi, amahlelo wokuthelelela, nofana imigqa yeenqubo zebubulo, iinvikeli zokugeleza emuva zivimbela ukugeleza emuva kungakhathaliseki bona mhlobobani we-fluid (amanzi, amakhemikhali, njll.) nofana ubukhulu besistimu.

5. **Ukunciphisa Umonakalo Wemitjhini**

Ngokumisa ukugeleza okubuyela emuva, iinqabo zokugeleza emuva zivikela iimpompo, amabhoyila, ama-heater wamanzi, nezinye iingcenye zesistimu ekulimaleni okubangelwa kugandeleleka emuva nofana isando samanzi (ukukhuphuka kwegandeleleko okungalindelekileko). Lokhu kwandisa isikhathi sokuphila kwemitjhini begodu kwehlisa iindleko zokuyitlhogomela.

6. **Ukusebenza okuzenzakalelayo**

Iinqabo zokubuyela emuvaukusebenza ngaphandle kokungenelela ngezandla, ukuphendula khonokho ekutjhugulukeni komfutho nofana ukubuyela emuva kokugeleza. Lokhu kuqinisekisa ukuvikeleka okuragela phambili ngaphandle kokuthembela ekutjhejweni babantu, okwenza bona zilungele iinhlelo ezinganamuntu nofana ezikude.

7. **Ukusebenzisa Iindleko**

Nanyana iindleko zokufaka zokuthoma zikhona, ukonga isikhathi eside kuqakathekile. Zehlisa iindleko ezihlobene nokuhlanza ukusilaphazeka kwamanzi, ukulungiswa kwemitjhini, iinhlawulo zomthetho, kanye nomlandu ongaba khona wezehlakalo zezamaphilo ezihlobene namanzi angcolileko. Kuhlekuhle, iinqabo zokugeleza emuva ziqakathekile ekugcineni ubuqotho behlelo, ipilo yomphakathi, nokusebenza kuhle kizo zoke iinsetjenziswa ezihlukahlukeneko ezisekelwe emanzini.