DMG0280 Directional Valve with manual actuation
Components Series 80
Max.operating pressure is 35MPa.
Max.Flow:60L/min
Hand knob position:
No sign means Hand knob in A side
R means Hand knob in B side
The valves with spring reset and detent function
O represents Steel Ball Location
W represents spring return
For details, see function symbols
Weight is about 1.8kgs
Hyd valve related article – The principle of hyd valve
Hyd valve and safety valve as a whole, composed of pilot pressure valve, which is unloading valve but also a safety valve, and sometimes the relief valve. When unloading, the control oil channel runs through various hyd valve, when the valve is in neutral position, the control oil path of unloading valve through the various reversing valve, and connected with the fuel tank. When unloading, unload the most of the oil, the channel is short, low pressure loss. As any way valve reversed, cut off the control oil path, the oil from the valve to enter the implementation of components, the work pressure controlled by the pilot valve. For the unloading mode, even if the increase in the number of the reversing valve, unloading the load pressure increases a little. So this unloading method for load used for manual reversing valve.