DIF-L32H1-S/DIF-L32H2-S單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)控制(zhi)油(you)(you)的泄漏(lou)方式(shi)(shi)(shi)(shi)(shi)有內(nei)泄式(shi)(shi)(shi)(shi)(shi)和(he)外(wai)泄式(shi)(shi)(shi)(shi)(shi)二種(zhong)(zhong)。在油(you)(you)流(liu)反向(xiang)(xiang)(xiang)出口(kou)(kou)無(wu)背(bei)壓(ya)(ya)(ya)的油(you)(you)路(lu)(lu)中(zhong)可(ke)用(yong)內(nei)泄式(shi)(shi)(shi)(shi)(shi)；否則需用(yong)外(wai)泄式(shi)(shi)(shi)(shi)(shi)，以降低(di)控制(zhi)油(you)(you)壓(ya)(ya)(ya)力。單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)是流(liu)體只能沿進水口(kou)(kou)流(liu)動，出水口(kou)(kou)介質卻無(wu)法回流(liu)，俗稱(cheng)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)。單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)又(you)稱(cheng)止(zhi)回閥(fa)(fa)或逆止(zhi)閥(fa)(fa)。用(yong)于液壓(ya)(ya)(ya)系(xi)統(tong)中(zhong)防止(zhi)油(you)(you)流(liu)反向(xiang)(xiang)(xiang)流(liu)動,或者用(yong)于氣(qi)動系(xi)統(tong)中(zhong)防止(zhi)壓(ya)(ya)(ya)縮空氣(qi)逆向(xiang)(xiang)(xiang)流(liu)動。單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)有直(zhi)(zhi)通式(shi)(shi)(shi)(shi)(shi)和(he)直(zhi)(zhi)角(jiao)式(shi)(shi)(shi)(shi)(shi)兩種(zhong)(zhong)。直(zhi)(zhi)通式(shi)(shi)(shi)(shi)(shi)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)用(yong)螺紋連接(jie)(jie)(jie)安(an)裝在管路(lu)(lu)上。直(zhi)(zhi)角(jiao)式(shi)(shi)(shi)(shi)(shi)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)有螺紋連接(jie)(jie)(jie)、板式(shi)(shi)(shi)(shi)(shi)連接(jie)(jie)(jie)和(he)法蘭連接(jie)(jie)(jie)三種(zhong)(zhong)形式(shi)(shi)(shi)(shi)(shi)。在液壓(ya)(ya)(ya)回路(lu)(lu)中(zhong)需要(yao)油(you)(you)流(liu)反向(xiang)(xiang)(xiang)流(liu)動時又(you)可(ke)利用(yong)控制(zhi)油(you)(you)壓(ya)(ya)(ya)，打開單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)，使(shi)油(you)(you)流(liu)在兩個方向(xiang)(xiang)(xiang)都可(ke)流(liu)動。液控單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)采用(yong)錐形閥(fa)(fa)芯，因此密(mi)封(feng)性能好(hao)。在要(yao)求封(feng)閉油(you)(you)路(lu)(lu)時，可(ke)用(yong)此閥(fa)(fa)作為(wei)油(you)(you)路(lu)(lu)的單(dan)(dan)向(xiang)(xiang)(xiang)鎖(suo)緊而起保壓(ya)(ya)(ya)作用(yong)。