Ngokusungulwa kwezidingo zempahla eluhlaza, izidingo zokuklama, izidingo zokukhiqiza, izidingo zokusebenza, izindlela zokuhlola, izidingo zohlelo lokusebenza, kanye nobudlelwano phakathi kwengcindezi nezinga lokushisa kumkhiqizo we-valve wepulasitiki wamazwe omhlaba kanye namazinga endlela yokuhlola, ungakuqonda ukuvala okudingekile kwepulasitiki. amavalvu Izidingo eziyisisekelo zokulawula ikhwalithi njengokuhlola, ukuhlolwa kwetorque nokuhlolwa kwamandla okukhathala.Ngendlela yetafula, izidingo zokuhlolwa kokuvala isihlalo, ukuhlolwa kokuvala umzimba kwe-valve, ukuhlolwa kwamandla omzimba we-valve, ukuhlolwa kwe-valve yesikhathi eside, ukuhlolwa kwamandla okukhathala kanye ne-torque yokusebenza edingekayo ngezidingo zokusebenza kwemikhiqizo yamavalvu epulasitiki kuyafingqwa.Ngokuxoxisana ngezinkinga ezimbalwa ezindinganisweni zamazwe ngamazwe, abakhiqizi nabasebenzisi bamavalvu epulasitiki bavusa ukukhathazeka.

Njengoba inani lamapayipi epulasitiki emanzini ashisayo nabandayo kanye nezicelo zobunjiniyela bamapayipi ezimbonini liqhubeka nokwanda, ukulawulwa kwekhwalithi yamavalvu epulasitiki ezinhlelweni zamapayipi epulasitiki kuya ngokuya kubaluleke kakhulu.

Ngenxa yezinzuzo zesisindo esilula, ukumelana nokugqwala, ukungenwa kwe-adsorption yesikali, ukuxhumana okuhlanganisiwe namapayipi epulasitiki, nokuphila isikhathi eside kwesevisi yama-valve epulasitiki, ama-valve epulasitiki asetshenziswa ekuhlinzekeni kwamanzi (ikakhulukazi amanzi ashisayo nokushisa) kanye nolunye uketshezi lwezimboni.Kuhlelo lwamapayipi, izinzuzo zalo zokusetshenziswa azifani namanye ama-valve.Njengamanje, ekukhiqizeni nasekusetshenzisweni kwama-valve epulasitiki afuywayo, ayikho indlela ethembekile yokuwalawula, okuholela eqophelweni elingalingani lamavalvu epulasitiki wokuphakela amanzi kanye nolunye uketshezi lwasezimbonini, okuholela ekuvaleni okuxekethile kanye nokuvuza okukhulu kwezicelo zobunjiniyela.Yakha isitatimende sokuthi ama-valve epulasitiki awakwazi ukusetshenziswa, okuthinta ukuthuthukiswa okuphelele kokufakwa kwamapayipi epulasitiki.izindinganiso kazwelonke zezwe lami zamavalvu epulasitiki asendleleni yokwakhiwa, futhi amazinga omkhiqizo wawo kanye nezindinganiso zendlela akhiwa ngokuvumelana nezindinganiso zamazwe ngamazwe.

Emazweni omhlaba, izinhlobo zamavalvu epulasitiki ikakhulukazi zifaka ama-valve ebhola, ama-butterfly valves, ama-sheke valve, ama-diaphragm valves nama-globe valves.Amafomu esakhiwo amakhulu ama-valve anezindlela ezimbili, izindlela ezintathu kanye nanezindlela eziningi.Izinto ezisetshenziswayo ikakhulukazi i-ABS,I-PVC-U, i-PVC-C, i-PB, i-PE,PPkanye ne-PVDF njll.

Emazingeni omhlaba emikhiqizo yamavalvu epulasitiki, imfuneko yokuqala yizinto ezingavuthiwe ezisetshenziswa ekukhiqizeni ama-valve.Umkhiqizi wezinto ezingavuthiwe kufanele abe nejika lokuhluleka lokunyundela elihlangabezana namazinga emikhiqizo yamapayipi epulasitiki.Ngasikhathi sinye, ukuhlolwa kokuvala uphawu, ukuhlolwa komzimba we-valve, kanye nakho konke Ukuhlolwa kokusebenza kwesikhathi eside, ukuhlolwa kwamandla okukhathala kanye ne-torque yokusebenza ye-valve konke kubaluliwe, kanye nempilo yesevisi yokuklama ye-valve yepulasitiki esetshenziselwa ukuthuthwa kwezimboni. uketshezi unikezwa iminyaka engu-25.

Izidingo zobuchwepheshe eziyinhloko zamazinga omhlaba

1 Izidingo zempahla eluhlaza

Impahla yomzimba we-valve, ibhonethi kanye nebhonethi kufanele kukhethwe ngokuhambisana ne-ISO 15493:2003 “Amasistimu wamapayipi epulasitiki embonini-ABS,I-PVC-Ukanye ne-PVC-C-Pipe kanye nokucaciswa kwesistimu yokufaka-Ingxenye 1: Uchungechunge lwe-Metric” kanye ne-ISO 15494: 2003 “Ama-Industrial Plastic Piping Systems—PB, PE, kanye ne-PP—Izicaciso ze-Pipe and Fitting System—Ingxenye 1: Uchungechunge Lwe-Metric.”

2 Izidingo zokuklama

a) Uma i-valve inokuqondisa okukodwa kokucindezela, kufanele imakwe ngomcibisholo ongaphandle komzimba wevalvu.I-valve ene-symmetrical design kufanele ifanele ukugeleza koketshezi okunezindlela ezimbili kanye nokuzihlukanisa.

b) Ingxenye yokuvala iqhutshwa yisiqu se-valve ukuvula nokuvala i-valve.Kufanele ibekwe ekugcineni noma iyiphi indawo phakathi ngokungqubuzana noma ama-actuator, futhi umfutho we-fluid awukwazi ukushintsha indawo yawo.

c) Ngokusho kwe-EN736-3, ubuncane bembobo yevalvu kufanele buhlangabezane namaphuzu amabili alandelayo:

- Kunoma yikuphi ukuvuleka lapho i-medium ijikeleza ku-valve, akufanele ibe ngaphansi kuka-90% yenani le-DN levalvu;

- Kuvalvu isakhiwo sayo sidinga ukunciphisa ububanzi bendawo egeleza ngayo, umenzi kufanele asho ubuncane bayo bangempela ngembobo.

d) Uphawu oluphakathi kwesiqu se-valve kanye nomzimba we-valve kufanele luhambisane ne-EN736-3.

e) Mayelana nokumelana nokuguga kwevalvu, idizayini yevalvu kufanele icabangele impilo yesevisi yezingxenye ezigugile, noma umenzi kufanele abonise emiyalweni yokusebenza isincomo sokushintsha yonke ivalvu.

f) Izinga lokugeleza elisebenzayo lazo zonke izinsimbi ezisebenza ngamavalvu kufanele lifinyelele ku-3m/s.

g) Kubonakala kusuka phezulu kwevalvu, isibambo noma isondo lesandla levalvu kufanele livale ivalvu ngendlela yewashi.

3 Izidingo zokukhiqiza

a) Izakhiwo zezinto zokusetshenziswa ezithengiwe kufanele zihambisane nemiyalelo yomkhiqizi futhi zihlangabezane nezidingo ezijwayelekile zomkhiqizo.

b) Umzimba we-valve kufanele umakwe ngekhodi yezinto ezingavuthiwe, ububanzi be-DN, kanye nengcindezi yegama elithi PN.

c) Umzimba wevalvu kufanele umakwe ngegama lomkhiqizi noma uphawu lokuhweba.

d) Umzimba we-valve kufanele umakwe ngosuku lokukhiqiza noma ikhodi.

e) Umzimba wamavalvu kufanele umakwe ngamakhodi ezindawo ezihlukene zokukhiqiza zomkhiqizi.

4 Izidingo zokusebenza zesikhashana

Ukusebenza kwesikhathi esifushane kuyinto yokuhlolwa kwefekthri kuzinga lomkhiqizo.Isetshenziselwa ikakhulukazi ukuhlolwa kokuvala isihlalo se-valve kanye nokuhlolwa kokuvala umzimba we-valve.Isetshenziselwa ukuhlola ukusebenza kokuvala kwe-valve yepulasitiki.Kudingeka ukuthi i-valve yepulasitiki akufanele ibe nokuvuza kwangaphakathi (ukuvuza kwesihlalo se-valve)., Akufanele kube khona ukuvuza kwangaphandle (ukuvuza komzimba we-valve).

Ukuhlolwa kokuvala kwesihlalo se-valve ukuqinisekisa ukusebenza kwesistimu yokuhlukanisa i-valve;ukuhlolwa kokuvala umzimba we-valve ukuqinisekisa ukuvuza kwe-valve stem seal kanye nophawu lwesiphetho ngasinye sokuxhuma se-valve.

Izindlela zokuxhuma i-valve yepulasitiki ohlelweni lwamapayipi yi

Ukuxhunywa kwe-butt welding: ububanzi obungaphandle bengxenye yokuxhumeka kwe-valve bulingana nobubanzi obungaphandle bepayipi, futhi ubuso bokuphela kwengxenye yokuxhuma kwe-valve buphambene nobuso bokuphela bepayipi lokushisela;

Ukuxhumeka kwe-socket bonding: ingxenye yokuxhuma i-valve isesimweni sesokhethi, ehlanganiswe nepayipi;

Uxhumano lwesokhethi ye-Electrofusion: ingxenye yokuxhuma i-valve isesimweni sesokhethi enocingo olushisa ngogesi olubekwe kububanzi obungaphakathi, futhi iwukuxhuma kwe-electrofusion nepayipi;

Ukuxhumeka kwe-socket hot-melt: ingxenye yokuxhuma i-valve isesimweni sesokhethi, futhi ixhunywe nepayipi nge-hot-melt socket;

Uxhumano lwe-socket bonding: Ingxenye yokuxhuma i-valve isesimweni sesokhethi, eboshwe futhi ifakwe ngepayipi;

Uxhumano lwendandatho yokuvala irabha yesokhethi: Ingxenye yokuxhuma i-valve iwuhlobo lwesokhethi enendandatho yangaphakathi yokuvala irabha, efakwe isokhethi futhi ixhunywe nepayipi;

Ukuxhumeka kwe-Flange: Ingxenye yokuxhuma kwe-valve isesimweni se-flange, exhunywe ne-flange epayipini;

Uxhumano lwentambo: ingxenye yokuxhuma i-valve isesimweni sentambo, exhunywe nentambo embhobho noma ukulingana;

Ukuxhuma okubukhoma: Ingxenye yokuxhuma i-valve isesimweni sokuxhuma bukhoma, okuxhunywe ngamapayipi noma izinsimbi.

I-valve ingaba namamodi ahlukene okuxhuma ngesikhathi esisodwa.

Ubudlelwano phakathi kwengcindezi yokusebenza nezinga lokushisa

Njengoba izinga lokushisa lokusetshenziswa likhuphuka, impilo yesevisi yama-valve epulasitiki izofinyezwa.Ukuze ugcine impilo yesevisi efanayo, kuyadingeka ukunciphisa ingcindezi yokusebenzisa.