Kwiinkqubo zehydraulic, kubalulekile ukuqonda umahluko phakathi kwevalve ye-overcenter kunye ne-aivelufa yokulinganisa. Nangona ezi zimbini zifana neminye imisebenzi, umzekelo, zombini zingasetyenziselwa ukukhusela umthwalo ekuweni kwamahhala, kukho ukungafani kwimigaqo yabo yokusebenza kunye neemeko zesicelo.

Umahluko phakathi kwevalve ephakathi kunye nevalve elungeleleneyo

Ivalve ye-overcenter (ekwabizwa ngokuba yivalve yokukhangela i-return) yivalve encediswa ngumqhubi we-pilot kunye nomsebenzi wokujonga ukuhamba ngokukhululekileyo. Into ebizwa ngokuba yi-pilot ratio ibhekisela kumlinganiselo phakathi kwendawo yoxinzelelo lomqhubi kunye nommandla wokuphuphuma. Lo mlinganiso ubalulekile kuluhlu loxinzelelo apho i-valve inokuhamba ukusuka ekuvaleni ukuya evulekile ngokupheleleyo, ngakumbi phantsi koxinzelelo lomthwalo ohlukeneyo. Umlinganiselo ophantsi womqhubi wenqwelo-moya uthetha umahluko omkhulu woxinzelelo lomqhubi wenqwelomoya ofunekayo ukuze uvule ngokupheleleyo ivalve. Njengoko uxinzelelo lomthwalo lusanda, umahluko ofunekayo kuxinzelelo lokulinga kwiireyishini zokulinga ezahlukeneyo uba mncinane.

I-valve ye-counterbalance valve isetyenziselwa ukukhusela isilinda somthwalo ekuweni, ukubonelela ngokusebenza kakuhle. Xa kuthelekiswa ne-pilot-operated check valves, ii-valve eziphikisanayo azibangeli ukunyakaza kwe-jerky xa umthwalo olawulwayo uyancipha. Iivalvu ezichaseneyo zikholisa ukusebenzisa icone okanye i-spool control elements, ezinecone counterbalance valves ezisetyenziselwa ukuthintela ukukhukuliseka kwesilinda kunye ne-spool counterbalance valves ezisetyenziswa njengezivalo zebrake kwi-hydraulic motor application.