Ivalvulithulusi elisetjenziselwa ukudlulisa nokulawula igesi ne-liquid okungenani iminyaka eyikulungwana yomlando.
Njenganje, erherhweni lamapayipi wamanzi, ivalvu yokulawula yinto yokulawula, begodu umsebenzi wayo omkhulu kukuhlukanisa imitjhini nehlelo lephayiphi, ukulawula ukugeleza, ukukhandela ukugeleza emuva, ukulawula nokukhipha umfutho. Njengombana kuqakathekile ukukhetha ivalvu yokulawula efanele khulu erherhweni lamapayipi, kuqakathekile nokuzwisisa ubujamo bevalvu kanye namagadango nesisekelo sokukhetha ivalvu.
Umfutho omncani wevalvu
Umfutho we-valve utjho umfutho onikelwe umklamo ohlobene namandla womtjhini weengcenye zamapayipi, okutjho bona, mtjhini wokusebenza ovunyelweko we-valve emazingeni womtjhiso atjhiwoko, ahlotjaniswa nezinto ze-valve. Umfutho wokusebenza awufani, ngalokho-ke, umfutho wegama yipharamitha encike eentweni zevalvu begodu uhlotjaniswa nezinga lokushisa elivunyelweko lokusebenza kanye nomfutho wokusebenza wento.
I-valve sisikhungo esisehlelweni lokujikeleza kwegazi eliphakathi nofana ihlelo lokugandeleleka, elisetjenziselwa ukulungisa ukugeleza nofana ukugandeleleka kwe-medium. Eminye imisebenzi ifaka hlangana ukuvala nofana ukuvula imidiya, ukulawula ukugeleza, ukutjhugulula indlela yokugeleza kwemidiya, ukukhandela ukugeleza kwemidiya emuva, nokulawula nofana ukukhipha umfutho.
Imisebenzi le yenziwa ngokulungisa ubujamo bokuvalwa kwevalvu. Ukulungiswa lokhu kungenziwa ngesandla nofana ngokuzenzakalelako. Ukusebenza ngesandla kufaka hlangana nokusebenza kokulawula idrayivu ngesandla. Amavalvu asetjenziswa ngezandla abizwa ngokuthi mavalvu asetjenziswa ngezandla. Ivalvu evimbela ukugeleza emuva ibizwa ngokuthi yivalvu yokuhlola; leyo elawula umfutho wokuphumula ibizwa nge-safety valve nofana i-safety relief valve.
Bekube nje, ibubulo le-valve likwazile ukukhiqiza uhla olupheleleko lwe-amavalvu wesango, amavalvu we-globe, amavalvu we-throttle, amavalvu wepulagi, amavalvu webholo, amavalvu kagesi, amavalvu wokulawula i-diaphragm, amavalvu wokuhlola, amavalvu wokuphepha, amavalvu wokwehlisa umfutho, amavalvu womtjhiso kanye namavalvu wokuvala ubujamo oburhabekileko. Imikhiqizo ye-valve yemikhakha eli-12, amamodeli angaphezu kwama-3000, kanye neenhlathululo ezingaphezu kwama-4000; umfutho omkhulu wokusebenza ngu-600MPa, ububanzi obukhulu obubizwako ngu-5350mm, izinga lokushisa eliphezulu lokusebenza ngu-1200°C, ubuncani bezinga lokutjhisa lokusebenza ngu--196°C, begodu umtjhini osebenzako ngamanzi, umtjhiso, amafutha, irhasi yemvelo, imitjhini eqinileko yokubola (njenge-nitric acid ehlanganisiweko, i-sulfuric acid ephakathi, njll.).
Tjheja ukukhethwa kwevalvu:
1. Ukuze kwehliswe ukutjhinga kwehlabathi kwepayipi,ivalvu yevivanengokuvamileko ikhethelwa umbhobho omkhulu; ububi obukhulu bevalvu yevivane kukuthi ipuleti yevithamini ithatha isigaba esithileko samanzi, okukhuphula ukulahlekelwa kwekhanda elithileko;
2. Amavalvu ajayelekileko afaka hlanganaamavalvu wevithamini, amavalvu wesango, amavalvu webhola kanye namavalvu wepulagi, njll. Ububanzi bamavalvu asetjenziswa enethiwekhi yokuphakelwa kwamanzi kufanele buqalwe ekukhetheni.
3. Ukufakwa nokusetjenziswa kwamavalvu webholo namavalvu wepulagi kubudisi begodu kuyabiza, begodu kuvamise ukufaneleka emaphayiphini amancani namaphakathi. Ivalvu yebholo nevalvu yepulagi igcina ubuhle bevalvu yesango elilodwa, ukujamelana nokugeleza kwamanzi okuncani, ukuvala okuthembekileko, isenzo esiguquguqukako, ukusebenza okulula nokugcinwa. Ivalvu yeplagi nayo ineenzuzo ezifanako, kodwana isigaba sokudlula amanzi akusiso isiyingi esipheleleko.
4. Nangabe kunefuthe elincani ekujuleni kwehlabathi yokumboza, linga ukukhetha ivalvu yesango; ukuphakama kwevalvu yesango kagesi enobubanzi obukhulu obujame ngqo buthinta ukujula kokuvala inhlabathi kwepayipi, begodu ubude bevalvu yesango elikhulu elivundlileko likhuphula indawo evundlileko ethathwe yiphayiphi begodu kuthinta ukuhleleka kwamanye amapayipi;
5. Eminyakeni esanda kwedlula, ngebanga lokuthuthukiswa kwethekhnoloji yokuphosa, ukusetjenziswa kwesihlabathi se-resin kungagwema nofana kwehlise ukusetjenziswa kwemitjhini, ngaleyindlela kwehlise iindleko, ngalokho ukusebenza kwamavalvu webholo asetjenziswa emaphayiphini amakhulu kufanele kuhlolisiswe. Malungana nomgca wokuhlukanisa ubukhulu be-caliber, kufanele uqalwe begodu uhlukaniswe ngokuya ngobujamo obuthileko.
Isikhathi sokuposa: Nov-03-2022
