Ngokwemveliiivalvu zesango lemelayenza kakuhle kulawulo lokuhamba ngendlela engafaniyo, kodwa kuhlala kukho umngcipheko wokuvuza xa ujongene nokuhamba kwe-bidirectional. Ngokwesiseko sevalve yesiko esikiweyo jikelele, ngophando kunye nophuhliso, imveliso iye yaphuculwa, kwaye imveliso entsha "indlela ezimbini ezithambileyo zevalve yokutywina" iye yakhuthazwa ukuqinisekisa ukuba isiphumo esisebenzayo sokutywina sokuvuza kwe-zero sinakho. kuzuzwe kulo naliphi na icala lokuhamba.

Uyilo olutsha lutshintsha ukufakwa kwerabha yokutywina, ithathe indawo yerabha ye-groove kwiivalve yesango le-sluiceumzimba onerabha elastiki, ebhijelwe kumzimba wevalvu. Le nzuzo kukusombulula ingxaki yokutshintshwa okunzima emva kokulahlekelwa kokutywinwa, ukuba ilahleko yokutywinwa, inokutshintshwa kwindawo, ukufakela okulula, ukuchithwa okulula kunye neenzuzo zokulondoloza, ukunciphisa impembelelo kwishedyuli yokuvelisa.

Ukongeza, umcu omnye werabha otywiniweyo uyatshintshwa ukutywinwa ngeendlela ezimbini kunye nomgca wokutywina ophindwe kabini ukusombulula izinto ezingeloncedo zokunganyanzelwa umva, nokubaivalve yesango eneflangedipleyiti igxininiswe phambili okanye kwicala loxinzelelo, i-deformation elastic yerabha inokudityaniswa ngokusondeleyo nepleyiti yevalve, ukufezekisa ukutywinwa kweendlela ezimbini, ukuphucula ukutywinwa, kunye nokufezekisa ukuvuza kwe-zero.

Imveliso yethu entsha ye-bidirectional yokutywina intsimbi yokutywina ivalve yesango ilungele amanzi ompompo, ugutyulo, ishishini lokucocwa kwamanzi, eyona nto iphambili kukuzitywina, ukutywinwa kwe-bidirectional, kunokufikelela ukutywinwa kwe-bidirectional, ukutywinwa okuphezulu. Akulula ukuphumela ngaphandle, inendawo encinci yokufakela, uxinzelelo oluphantsi lokusebenza, akukho lula ukuqokelela i-debris, isango loxinzelelo oluphezulu alunakungcangcazela, akukho ngxolo, umjelo onqamlekileyo, ukuchasana kokuhamba okuncinci, akukho kulahleka koxinzelelo, xa isango ivaliwe, uxinzelelo oluphakathi oluthembekileyo lutyhala uxinzelelo lwesango ukuya kwelinye icala lesihlalo sevalve yesango lokutywina ukuqinisekisa umphezulu wokutywina. Olu lutsha aluphuculi kakhulu kuphela ukuqina kunye nokuthembeka kwevalve, kodwa kwakhona kunciphisa kakhulu ukulahleka kwamandla kunye nokungcoliswa kwendalo okubangelwa ukuvuza. Emva kokubonakala kweevalvu zesango lokutywinwa kwe-bidirectional, inani elikhulu leevalve ezisikiweyo ngokubanzi zitshintshwe zizo.