Valve da aka yi amfani da shi don sarrafa motsi da kulle mai kunnawa a cikin bangarorin biyu ta hanyar fahimtar saukowar lodin da ba ya tserewa da nauyinsa, kamar yadda bawul ɗin ba ya ƙyale kowane cavitation na actuator. Ba shi da hankali ga matsa lamba na baya don haka ana amfani da shi a inda ma'auni na al'ada ba sa aiki yadda ya kamata a sarrafa kaya, yana ba da damar matsa lamba da tsarin ya yi amfani da shi don yin aiki da masu kunnawa da yawa a cikin jerin. Haɗin flange suna ba da damar sanya bawul ɗin kai tsaye akan mai kunnawa.

Bawuloli na BOST na jerin bawuloli biyu ne na sama: suna yin aikin tallafawa da sarrafa saukowar kaya ta hanyoyi biyu. Ana amfani da bawul ɗin daidaita ma'auni biyu a cikin aikace-aikace tare da nau'ikan nau'ikan bidirection wanda ya zama dole don tabbatar da kwanciyar hankali a wurin aiki kuma don sarrafa motsin su bawul ɗin bawul ɗin flangable ne, watau ana iya shafa su kai tsaye akan actuator (gaba ɗaya silinda na hydraulic). Ta hanyar flanging an haɗa layin baya daga silinda zuwa layin sarrafawa, ciyar da shi a cikin lokacin isar da kyauta ta hanyar bawul ɗin rajistan biyu. Bawuloli masu daidaita ma'auni bawuloli ne masu sarrafa matukin jirgi. Ƙaddamar da layin da ke gefen baya zuwa kaya, ana amfani da layin matukin jirgi kuma yana sarrafa sashin buɗewa na layin saukowa don ba da damar sarrafa motsi ko da a gaban nauyin nauyi da kuma guje wa abin mamaki na cavitation. Godiya ga raguwar raguwa tsakanin layin kaya da layin matukin jirgi na hydraulic (matukin matukin jirgi), matsin lamba da ake buƙata don buɗe bawul ɗin yana ƙasa da matsa lamba na saiti. Bawul ɗin daidaita ma'auni guda biyu kuma yana iya yin aikin kare tsarin injin hydraulic da tsarin injin da ke da alaƙa da shi, yana aiki azaman bawul mai jujjuyawa lokacin da matsa lamba ya faru saboda nauyi mai yawa ko tasirin haɗari. Wannan aikin yana yiwuwa ne kawai idan an haɗa layin dawowa akan mai rarrabawa zuwa magudanar ruwa. Bawul ɗin ma'auni ne na rabin-diyya: saitin bawul ɗin ba ya shafar kowane saura matsa lamba akan layin dawowa, matsi wanda a maimakon haka yana ƙara matsa lamba na matukin da ake buƙata don buɗe bawul ɗin. Wannan nau'in bawul don haka ya dace da shigarwa a cikin tsarin da ya haɗa da masu rarrabawa tare da rufaffiyar tsakiya, tare da amfani da aka rufe a tsaka tsaki.

Maɓalli mai mahimmanci don tallafawa kaya shine hatimin hydraulic. Don ba da garantin mafi kyawun aiki ta fuskar hatimi, BOST yana ba da kulawa ta musamman ga fahimtar abubuwan da aka gyara, tun daga gininsu cikin ƙarfi mai ƙarfi, tauri da niƙa, zuwa ga ƙima da tabbatarwa na geometric, da kuma gwajin waɗanda aka haɗa bawul. The  counterbalance bawul sassa ne a cikin bawul ɗin jiki: duk abubuwan da aka gyara ana ajiye su a cikin ma'ajin na'ura mai ƙarfi, bayani wanda ke ba da damar sarrafa yawan magudanar ruwa yayin da ke rage girman gaba ɗaya. Dukkanin faifai an yi su ne da ƙarfe, wannan yana ba da damar bawul ɗin daidaita ma'auni na BOST don yin aiki tare da matsi har zuwa mashaya 350 (5075 PSI) kuma yana ba da garantin babban juriya don amfanin rayuwar bawul ɗin. Don isassun juriya ga aikin jami'ai masu lalata, jikin bawul da abubuwan waje ba su da batun jiyya ta sanya zinc. An daidaita jikin bawul akan duk saman shida don ingantaccen magani. Don aikace-aikacen da aka fallasa ga magunguna masu lalata musamman (misali aikace-aikacen ruwa) ana samun maganin zinc-nickel akan buƙata.  Ana samun bawuloli a cikin masu girma dabam daga BSPP 1/4 "zuwa BSPP 1/2" don ƙarfin aiki har zuwa 60 lpm (15,9 gpm). Bugu da ƙari, kewayon saiti daban-daban da ma'auni daban-daban na matukin jirgi suna samuwa don dacewa da kowane nau'in aikace-aikace. Don mafi kyawun aiki yana da kyau a daidaita bawul ɗin ƙima a ƙimar 30% sama da matsakaicin nauyin aiki.