換向閥主要包括電磁換向閥，手動(dòng)換向閥，電液換向閥，四通換向閥，多路換向閥，氣控?fù)Q向閥，五聯(lián)多路換向閥，二位二通換向閥等。手動(dòng)換向閥是用手動(dòng)杠桿操縱閥芯移位的方向控制閥。在液壓系統(tǒng)中，它可控制油流方向，以改變執(zhí)行元件的運(yùn)動(dòng)方向。手動(dòng)換向閥的滑閥換向定位方式有鋼球定位式和彈簧復(fù)位式二種結(jié)構(gòu)。鋼球定位式是當(dāng)操縱手柄外力取消后，閥芯依靠鋼球定位保持在換向位置。彈簧復(fù)位式是當(dāng)操縱手柄外力取消后，彈簧使閥芯自動(dòng)回復(fù)到初始位置。電磁換向閥是通過電氣信號(hào)來改變液流方向的控制閥門，它可用來實(shí)現(xiàn)液壓系統(tǒng)的卸載，順序動(dòng)作及油路換向。電磁換向閥主要用于工程機(jī)械、礦山機(jī)械、起重運(yùn)輸機(jī)械以及其它機(jī)械的液壓系統(tǒng)中。

　　direction change valve include electromagnetic direction change valve, manual direction change valve, call liquid direction change valve, four way direction change valve, multiplexed direction change valve, gas control direction change valve, five of multiplexed direction change valve, two spaces, such as two-direction change valve

　　Manual is a manual lever manipulation direction change valve disc killer direction control valves. In the hydraulic system, it can control the oil flow direction, the implementation of components of the Movement to change direction. Manual direction change valve the slide-valve for a way to the positioning of spaces steel ball positioning-and-two types of spring-loaded structure. steel ball positioning of manipulation handle external forces when lifting, positioning steel ball disc rely on to maintain in-place. When the manipulation of spaces is a spring-loaded handle external forces cancellation, disc spring-loaded to automatically revert to the initial position. direction change valve electromagnetic signals through electrical control valves to change the direction of liquid flow, it can be used to achieve hydraulic unloading system, the order to move and change oil flow. Electromagnetic direction change valve mainly for engineering machinery, mining machinery, transport machinery and other mechanical lifting hydraulic system