基(ji)本(ben)單元包括大面(mian)積雙(shuang)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)驅(qu)動(dong)(dong)(dong)活(huo)塞(sai)，通(tong)過高(gao)壓(ya)(ya)(ya)密封和軸承直接(jie)連接(jie)到雙(shuang)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)增(zeng)壓(ya)(ya)(ya)活(huo)塞(sai)。驅(qu)動(dong)(dong)(dong)部(bu)分包括閥(fa)芯型方向控制閥(fa)和2個提(ti)升(sheng)式先導閥(fa)，使得每當壓(ya)(ya)(ya)縮(suo)空(kong)(kong)氣(qi)(qi)（或(huo)合(he)適的氣(qi)(qi)體）被施加(jia)到驅(qu)動(dong)(dong)(dong)端口(kou)(kou)時它將自動(dong)(dong)(dong)往復運(yun)動(dong)(dong)(dong)。驅(qu)動(dong)(dong)(dong)排(pai)氣(qi)(qi)被引導到消聲器(qi)(qi)，消聲器(qi)(qi)位于(yu)帶翅片氣(qi)(qi)體部(bu)分附近以增(zeng)強冷卻。在雙(shuang)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)（DS）型號中，由于(yu)內(nei)置雙(shuang)入口(kou)(kou)和出口(kou)(kou)止回閥(fa)的作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)，增(zeng)壓(ya)(ya)(ya)活(huo)塞(sai)提(ti)供雙(shuang)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)輸出流(liu)量。7A-DS-8通(tong)過驅(qu)動(dong)(dong)(dong)并提(ti)升(sheng)60-100 PSI工廠壓(ya)(ya)(ya)縮(suo)空(kong)(kong)氣(qi)(qi)進入200 - 600 PSI接(jie)收機(ji)，以備份空(kong)(kong)氣(qi)(qi)動(dong)(dong)(dong)力的生產機(ji)器(qi)(qi)或(huo)工具(ju)。本(ben)設備可(ke)用(yong)(yong)(yong)于(yu)環境溫(wen)度下的液化氣(qi)(qi)體（兩相），汽(qi)化器(qi)(qi)關閉低溫(wen)罐，儀器(qi)(qi)空(kong)(kong)氣(qi)(qi)（或(huo)工廠空(kong)(kong)氣(qi)(qi)）。

美國HII（Hydraulics International, Inc.）成立于1976年，是世界上為民用飛機提(ti)供(gong)地(di)面保(bao)障設備的(de)主要生產商之一。HII是一個研發(fa)組織(zhi)，HII的(de)現代化(hua)使HII能不斷的(de)改(gai)進地(di)面保(bao)障領域的(de)產品(pin)，HII提(ti)供(gong)更(geng)可(ke)靠、易維護和(he)更(geng)具(ju)支持性的(de)產品(pin)，在各種軍(jun)事(shi)項目中(zhong)將更(geng)有(you)作為。