Ukukhethwa kunye nendawo yeevalvu

I-1, i-valve yokukhetha kunye nokumisela indawo: (1) Iivalve ezisetyenziswe kumbhobho wonikezelo lwamanzi zikhethwa ngokubanzi ngokwemigaqo elandelayo: 1. Xa ububanzi bombhobho bungekho ngaphezu kwe-50mm, i-valve yokumisa kufuneka isetyenziswe. Xa i-diameter yombhobho ingaphezu kwe-50mm, ivalve yesango kunye nevalve yebhabhathane iya kusetyenziswa. ukuxhathisa kwamanzi (okufana nombhobho wokufunxa wempompo yamanzi) 4. Ivalve yesango kunye nevalve yebhabhathane iya kusetyenziswa kwicandelo lombhobho apho umbhobho ufuna ukuqukuqela kumacala amabini, kwaye ivalve yokumisa mayingasetyenziswa 5. Ivalve yebhabhathane kunye nevalve yebhola kufuneka 6. Ivalve yokumisa kufuneka isetyenziselwe icandelo lombhobho elihlala livuliwe kwaye livalwe 7. Ivalve yokusebenza kufuneka isetyenziswe kumbhobho wokuphuma wempompo enecaliber enkulu (2) Iivalvu ziya kuba kubonelelwe kwezi ndawo zilandelayo zombhobho wonikezelo lwamanzi: 1. Umbhobho wonikezelo lwamanzi kwindawo yokuhlala usuka kwicandelo lombhobho lombhobho wonikezelo lwamanzi kamasipala 2. Indawo yothungelwano lwemibhobho yesangqa yangaphandle kwindawo yokuhlala iya kumiselwa ngokweemfuno ze ukwahlukana. Ukuba icandelo lombhobho we-annular lide kakhulu, kuyacetyiswa ukuba usete ivalve yecandelo 3. Isiphelo sokuqala sombhobho wesebe okanye isiphelo sombhobho wokudibanisa ukusuka kumbhobho ongundoqo wonikezelo lwamanzi weendawo zokuhlala 4. Umbhobho wasekhaya, imitha yamanzi kunye isikhuphukeli sesebe ngalinye (esezantsi kwesikhuphusi kunye nenxalenye ephezulu nesezantsi yombhobho othe nkqo we-annular network riser) 5. Umbhobho oyintloko wombhobho wombhobho wombhobho wombhobho wombhobho wombhobho wombhobho wombhobho wombhobho womnatha womnatha wombhobho 6. Indawo yokuqala yombhobho wokusasaza oqhagamshelwe ukusuka kwindlu yangaphakathi. Umbhobho wonikezelo lwamanzi ekhayeni, kwindlu yangasese kawonke-wonke, njl.njl kunye nemibhobho yokukhupha amatanki amanzi. 11. Ezinye izincedisi, ezifana ne-valve yokukhupha i-automatic, i-valve yokunciphisa uxinzelelo, i-hammer eliminator yamanzi, i-gauge ye-pressure gauge, i-sprinkler, njl., i-valve yokunciphisa uxinzelelo kunye ne-backflow preventer, njl. njl. ivalve (3) Ngokuqhelekileyo, i-valve yokukhangela iya kukhethwa ngokwendawo yokufakela, uxinzelelo lwamanzi phambi kwevalve, iimfuno zokusebenza zokutywina emva kokuvala kunye nobukhulu behamile yamanzi okubangelwa ukuvala 1. Xa uxinzelelo lwamanzi luphambi kwevalve, ujingi , ibhola kunye ne-shuttle check valves kufuneka zikhethwe 2. Xa ukusebenza kokutywinwa emva kokuvalwa kuqinisiwe, kuyacetyiswa ukuba ukhethe i-valve yokukhangela nge-spring yokuvala 3. Xa kufuneka ukuba buthathaka isando samanzi sokuvala, kuyacetyiswa ukuba ukhethe i-valve yokuvala Ivalve yokukhangela ukuvala ngokukhawuleza okanye ivalve yokukhangela ukuvala kancinane enesixhobo sokumanzisa 4. Ivalve yevalve okanye undoqo wevalve yevalvu yokutshekisha iya kukwazi ukuzivalela ngokwawo phantsi kwentshukumo yomxhuzulane okanye amandla asentwasahlobo (4) Iivalvu zokukhangela ziya kubonelelwa amacandelo alandelayo ombhobho wonikezelo lwamanzi: Kumbhobho wokungena; kwisifudumezi-manzi esivaliweyo okanye kwisixhobo samanzi; kumbhobho wokukhupha impompo yamanzi; kumbhobho ophumayo wetanki yamanzi, inqaba yamanzi kunye nedama lendawo ephakamileyo apho indawo yokungena amanzi kunye nemibhobho yokuphuma yabelana ngombhobho omnye. Qaphela: icandelo lombhobho elinombhobho wokuthintela ukubuyela ngasemva akudingi ukufaka i-valve yokukhangela. (5) Izixhobo zokukhupha ziya kubonelelwa kwezi ndawo zilandelayo zombhobho wonikezelo lwamanzi: 1. Kuthungelwano lonikezelo lwamanzi lwethutyana, ivalve yokukhupha ngokuzenzekelayo iya kusetwa ekupheleni kunye neyona ndawo iphezulu yombhobho wombhobho 2. Uthungelwano lonikezelo lwamanzi lucacile ukuguquguquka kunye nokuqokelela komoya kwicandelo lombhobho, kunye nevalve yokukhupha ngokuzenzekelayo okanye ivalve yesandla isetiwe kwindawo ephezulu yecandelo ukukhupha 3. Xa itanki yamanzi yoxinzelelo lomoya oluzenzekelayo isetyenziselwa isixhobo sokuhambisa amanzi ngoxinzelelo lomoya, eyona ndawo iphezulu Uthungelwano lokuhambisa amanzi luya kuxhotyiswa ngevalve yokuphuma ezenzekelayo