Xa usebenza, vala amaqela amabini okukhangela i-valve kunye ne-balance valves.Ukuba uhlolo luyafuneka, vele unqumle uxinzelelo oluphezulu kunye ne-low-pressure valves, vula ivalve yebhalansi kunye neevalve ezimbini zokujonga, kwaye uvale ivalve yokulinganisa ukulinganisa kunye nokulinganisela umthumeli.