I-valve esetyenziselwa ukulawula ukunyakaza kunye nokutshixa i-actuator kumacala omabini ngokuqaphela ukuhla okulawulwayo komthwalo ongenakubaleka ukutsalwa ubunzima bawo, njengoko i-valve ayivumeli nayiphi na i-cavitation ye-actuator. Akunamvakalelo kuxinzelelo lwangasemva kwaye ngoko ke isetyenziswe apho i-overcenters eqhelekileyo ingasebenzi ngokufanelekileyo kulawulo lomthwalo, ivumela uxinzelelo olubekwe yinkqubo ukuba lusetyenziselwe ukusebenzisa ii-actuator ezininzi kuthotho. Ukudibanisa kwe-flange kuvumela ukuba i-valve ifakwe ngokuthe ngqo kwi-actuator.

Iivalvu ze-BOST zolu thotho zizivalo eziphindwe kabini: zenza umsebenzi wokuxhasa nokulawula ukuhla komthwalo kumacala amabini. Iivalvu eziphindwe kabini ezichaseneyo zisetyenziswa kwizicelo ezinemithwalo ye-bidirectional apho kuyimfuneko ukuqinisekisa uzinzo kwindawo yokusebenza kunye nokulawula intshukumo yazo  iivalvu eziziivalvu ezivulekayo, okt zingasetyenziswa ngokuthe ngqo kwi-actuator (ngokubanzi icylinder yehydraulic). Ngokusebenzisa i-flanging imigca yangasemva evela kwi-cylinder ixhunywe kumgca olawulwayo, wondliwa kwisigaba sokuhanjiswa ngokukhululeka ngokukhululeka ngee-valve ezimbini zokujonga. Iivalve ezichaseneyo zizivalo eziqhutywayo ezilingwayo. Ukunika amandla umgca kwicala elichasene nomthwalo, umgca we-pilot uyasebenza kwaye ulawula ukuvulwa kwenxalenye yomgca wokuhla ukuze uvumele ukulawulwa kwentshukumo nangona kukho imithwalo ye-gravitational kunye nokuphepha i-cavitation phenomenon. Ngombulelo kumlinganiselo wokunciphisa phakathi komgca womthwalo kunye nomgca womqhubi we-hydraulic (i-pilot ratio), uxinzelelo olufunekayo ukuvula iivalve lungaphantsi koxinzelelo lokumisela. Ivalve ephindwe kabini echaseneyo isenokwenza umsebenzi wokukhusela isixokelelwano soxinzelelo lwendalo kunye nolwakhiwo lomatshini oluqhagamshelwe kuyo, lusebenza njengevalve yongqinisiso lothuso xa iincopho zoxinzelelo zisenzeka ngenxa yomthwalo ogqithisileyo okanye iimpembelelo zengozi. Lo msebenzi unokwenzeka kuphela ukuba umgca wokubuyela kwi-distributor uxhunywe kwi-drain. Ivalve echasene ne-semi-compensated counterbalance: ukusetwa kwevalvu akuchatshazelwa luxinzelelo olushiyekileyo kwimigca yokubuya, uxinzelelo oluthi endaweni yoko lunyuse uxinzelelo lokulinga olufunekayo ukuze uvule ivalvu. Olu hlobo lwevalve ngoko lufanelekile ukufakwa kwiinkqubo ezibandakanya abasasazo abanezilayidi ezivaliweyo, kunye nokusetyenziswa okuvaliweyo ngokungathathi hlangothi.

Into ephambili yokuxhasa umthwalo sisitywina se-hydraulic. Ukuqinisekisa owona msebenzi ubalaseleyo ngokutywinwa, iBOST inika ingqwalasela eyodwa ekufezekisweni kwamacandelo, ukusuka kulwakhiwo lwawo ngokuqina okuphezulu, intsimbi eqinisiweyo kunye negayiweyo, ukuya kungqinisiso lwedimensional kunye nejometri, kunye novavanyo lwezinto ezidityanisiweyo. ivalve. Iivalvu ezichaseneyo ngamalungu kwiivalvu zomzimba: onke amalungu afakwe ngaphakathi kwe-hydraulic manifold, isisombululo esivumela ukulawula amazinga okuhamba okuphezulu ngelixa ugcina imilinganiselo iyonke iphantsi. Zonke ii-manifolds zenziwe ngentsimbi, oku kuvumela ukuba i-BOST i-counterbalance valves isebenze ngoxinzelelo ukuya kwi-350 bar (5075 PSI) kwaye iqinisekisa ukuxhathisa okuphezulu ukunxiba ukuze kuzuze ubomi obuncedo bevalve. Ukuchasana okwaneleyo kwisenzo se-ejenti ezitshabalalisayo, umzimba we-valve kunye namacandelo angaphandle awaxhomekeke kunyango lwe-zinc plating. Umzimba wevalvu ulungelelaniswa kuyo yonke imiphezulu emithandathu ukuze unyango olungcono. Ukusetyenziswa kwezicelo ezivezwe ngokukodwa kwizinto ezidlodlayo (umz. izicelo zaselwandle) unyango lwe-zinc-nickel luyafumaneka xa ulucelile.  iivalve zifumaneka ngobukhulu ukusuka BSPP 1/4 "ukuya BSPP 1/2" amandla okusebenza ukuya 60 lpm (15,9 gpm). Ngaphaya koko, iisetingi ezahlukeneyo zokuseta kunye neereyishini ezahlukeneyo zokulinga ziyafumaneka ukuze zilungelelaniswe ngcono kuzo zonke iintlobo zezicelo. Ukusebenza ngokufanelekileyo kuyacetyiswa ukuba ulungelelanise i-valve ye-counterbalance kwixabiso le-30% ephezulu kunomsebenzi omkhulu womsebenzi.