Iivalvu zokujonga ezisebenza ngolingoluhlobo lwevalve yokukhangela esebenzisa ivalve yokulinga ukulawula ukuhamba kolwelo. Ivalve yokulinga ngokuqhelekileyo ibekwe ezantsi komjelo wevalve yokutshekisha kwaye iqhagamshelwe kwicala elingasentla levalve yokukhangela ngomgca wokulinga.
Iivalvu zokujonga eziqhutywa ngumqhubi wenqwelomoya zibonelela ngenani leenzuzo ngaphezulu kweevalvu zokujonga zesintu, kubandakanya:
Ukwenyuka kokuthembeka: Iivalve zokujonga ezisebenza ngomqhubi zithembeke ngakumbi kuneevalve zesiqhelo zokujonga kuba ivalve yokulinga inceda ukuthintela ukuvuza kwevalve.
Ukhuseleko oluphuculweyo: Iivalvu zokutshekisha ezisebenza ngokulingwa zinokunceda ekuphuculeni ukhuseleko ngokuthintela ukubuya umva kolwelo.
Ukugcinwa okuncitshisiweyo: Iivalve zokujonga ezisebenza ngomqhubi zifuna ukugcinwa okuncinci kuneevalve eziqhelekileyo zokujonga ngenxa yokuba ivalve yokulinga inceda ekunciphiseni ukuguga kunye nokukrazula kwivalve yokukhangela.
Iivalvu zetshekhi eziqhutywa ngumqhubi wepilot zingasetyenziswa kwiintlobo ngeentlobo zezicelo, kubandakanywa:
I-oyile nerhasi: Iivalvu zokutshekisha ezisebenza ngokulingwa zisetyenziswa kwimibhobho yeoli neyerhasi ukuze kuthintelwe ukuphuma ngasemva kweoyile okanye igesi.
Ukusetyenzwa kweekhemikhali: Iivalvu zokutshekisha ezisebenza ngolingo zisetyenziswa kwiiplanti zokulungisa imichiza ukuthintela ukubuya umva kweekhemikhali.
Ukutya nesiselo: Iivalvu zokutshekisha ezisetyenziswa ngumqhubi wenqwelo-moya zisetyenziswa kwizityalo ezilungisa ukutya neziselo ukuthintela ukubuya umva kokutya okanye isiselo.
Unyango lwamanzi: Iivalvu zokuhlola ezisetyenziswa ngumqhubi wenqwelomoya zisetyenziswa kwizityalo zokucocwa kwamanzi ukuthintela ukubuya umva kwamanzi angcolisekileyo.
Kukho iintlobo ezimbini eziphambili zeevalvu zokujonga ezisebenza ngumqhubi:
Ukusebenza ngokuthe ngqo: I-valve yokujonga i-pilot-operated check valves isebenzisa uxhulumaniso oluthe ngqo phakathi kwevalve yokulinga kunye nevalve yokutshekisha. Olu hlobo lwesivalo lusetyenziswa ngokuqhelekileyo kwizicelo apho amazinga okuhamba okuphezulu okanye uxinzelelo oluphezulu lufuneka.
Ukusebenza ngokungathanga ngqo: Iivalve zokuhlola ezisebenza ngokungathanga ngqo zisebenzisa isiphethu ukubonelela ngamandla ukuvala ivalve yokujonga. Olu hlobo lwesivalo lusetyenziswa ngokuqhelekileyo kwizicelo apho amazinga okuhamba okuphantsi okanye uxinzelelo oluphantsi lufuneka.
Abavelisi be-pilot-operated check valves bahlala bephuhlisa uyilo olutsha kunye nolutsha ukuhlangabezana neemfuno zoluhlu olubanzi lwezicelo. Olunye uphuhliso lwamva nje kweli candelo lubandakanya:
Izixhobo ezitsha: Abavelisi baphuhlisa izixhobo ezitsha zokujonga iivalvu eziqhutywa ngumqhubi wenqwelomoya ezibonelela ngokuphucuka kokumelana nomhlwa, ukomelela, kunye nokuqina.
Uyilo olutsha: Abavelisi baphuhlisa uyilo olutsha lweevalvu zokujonga eziqhutywa ngulingo ezibonelela ngokuphucuka kobuchule, ukuthembeka, kunye nokulula ukusetyenziswa.
Ubuchwephesha obutsha: Abavelisi baphuhlisa itekhnoloji entsha yeevalvu zokutshekisha ezisebenza ngolingo ezibonelela ukusebenza okuphuculweyo kunye nokhuseleko.
Iivalve zokuhlola eziqhutywa ngumqhubi wenqwelomoya luhlobo oluguquguqukayo noluthembekileyo lwevalve enokusetyenziswa kwiinkqubo ezahlukeneyo. Ezi zivalo zinika inani leenzuzo ngaphezu kweevaluvu zokutshekisha zendabuko, kubandakanywa ukuthembeka okwandisiweyo, ukhuseleko oluphuculweyo, kunye nokugcinwa okuncitshisiweyo. Njengoko imfuno ezi valves iqhubeka ukukhula, abavelisi baphuhlisa uyilo olutsha kunye nolutsha ukuhlangabezana neemfuno zoluhlu olubanzi lwezicelo.