biyu duba bawuloli yana yiwuwa a sarrafa goyon baya da motsi na da aka dakatar da lodi a cikin biyu kwatance na actuation. Abubuwan da aka saba amfani da su don irin wannan nau'in bawul ɗin yana cikin gaban silinda masu aiki biyu waɗanda kuke son kullewa a wurin aiki ko hutawa. An ba da garantin hatimin hatimin hydraulic ta wani tauri mai tauri da ƙasa. Godiya ga ma'aunin matukin jirgi, matsa lamba na sakin ya yi ƙasa da wanda aka ɗagawa da shi ya jawo.

VRDF bawuloli suna samuwa tare da BSPP-GAS threaded tashar jiragen ruwa a kan bayarwa da kuma dawo da Lines da flanged tashar jiragen ruwa a kan Lines zuwa Silinda. Dangane da girman da aka zaɓa, za su iya aiki tare da matsananciyar aiki har zuwa mashaya 350 (5075 PSI) da 45 lpm (13.2 gpm). Jikin waje an yi shi da ƙarfe mai ƙarfi kuma ana kiyaye shi ta waje daga iskar oxygen tare da jiyya na galvanizing. Ana samun maganin Zinc/Nickel akan buƙatar aikace-aikace musamman fallasa ga masu lalata.