單向閥又稱止回閥
安裝止回閥時(shí)，應(yīng)特別注意介質(zhì)流動(dòng)方向，應(yīng)使介質(zhì)正常流動(dòng)方向與閥體上指示的箭頭方向相*，否則就會(huì)截?cái)嘟橘|(zhì)的正常流動(dòng)。底閥應(yīng)安裝在水泵吸水管路的底端。
止回閥關(guān)閉時(shí)，會(huì)在管路中產(chǎn)生水錘壓力，嚴(yán)重時(shí)會(huì)導(dǎo)致閥門、管路或設(shè)備的損壞，尤其對(duì)于大口管路或高壓管路，故應(yīng)引起止回閥選用者的高度注意。
止回閥只供防止各類管路或設(shè)備上流體介質(zhì)逆流的單向啟閉閥。

華德液壓閥：

Z2S10-1-30B/  Z2S10-3-30B/  Z2S10A1-30B/  Z2S10A3-30B/

Z2S10B1-30B/  Z2S10B3-30B/

4WE10F31B/CG24N9Z5L  4WE10F31B/CW220-50N9Z5L

4WE10G31B/CG24N9Z5L  4WE10G31B/CW220-50N9Z5L

4WE10H31B/CG24N9Z5L  4WE10H31B/CW220-50N9Z5L

M-4SEW6D30B/420MG24N9K4  M-4SEW6D30B/630MG24N9K4

M-4SEW6Y30B/420MG24N9K4  M-4SEW6Y30B/630MG24N9K4

DB3U10H-1-30B/100W220-50NZ5L  DB3U10H-1-30B/100G24NZ5L

DB3U10H-1-30B/315W220-50NZ5L  DB3U10H-1-30B/315G24NZ5L

DB3U10H-2-30B/100W220-50NZ5L  DB3U10H-2-30B/100G24NZ5L

HED4OH15B/50Z14L24S  HED4OH15B/100Z14L24S  HED4OH15B/350Z14L24S

HED4OH15B/50Z14L110S  HED4OH15B/100Z14L110S  HED4OH15B/350Z14L110S

HED4OH15B/50Z14L220S  HED4OH15B/100Z14L220S  HED4OH15B/350Z14L220S

DB30-1-50B/50  DB30-1-50B/100  DB30-1-50B/200  DB30-1-50B/315 

DB30-2-50B/50  DB30-2-50B/100  DB30-2-50B/200  DB30-2-50B/315