Joystick loader valve is very popular in vehicles or hydraulic systems operated by people. Hydraulic joystick valve can be found in loaders, diggers and sometimes lumber cranes. There are few types of valves and we can divide them by build or type of control, but joystick loader valves are mostly multi-section and multi-way. For an amateur the lever looks like standard console or computer joystick. The principle of operation is similar like in standard directional hydraulic valve. In simple words it is closed tube with multiple holes and pistons (or just one) inside. Couple holes are used to attach hose and deliver oli to piston, and make it move with power created by the pump. Other holes are to transport oil from valve to propel hydraulic cylinders in the loader (or other machine). They can be used in closed or open circulation of liquid.
Joystick loader valve is mainly operated by lever but can be also combined with other types of control, like electric with solenoid or servomotor for more comfortable operating. There are two man solutions of this valve - joystick is in the operator’s cabin and valve is in the other place operated electrically or joystick stands directly on the valve. In the simplest model joystick loader valve has lever to manage the flow of oil trough the valve. Joystick is controlled manually and every move is designed to perform the appropriate task. Most hydraulic joystick loader valves have got three or five positions, first is neutral – when lever is positioned vertically - piston cylinder stand and oil goes to overflow, second for work - lever set to slant forward – piston cylinder extends, third also working – lever set to slant backward - piston cylinder retracts. The other two positions (left and right in five position lever) are mostly used for side moves. Levers with springs are almost in every hydraulic joystick loader valve. They are used for more comfortable steering and for safety reasons. Every time when operator releases the lever, loader stops and doesn't move until the next command by the joystick.
Main parameters of every valve are diameters of the piston and threads, efficiency of flow (measured by liters per minute), maximum pressure they can stand. For joystick loader valve the number of possible directions of the lever are also important.
Joystick loader valve should work in ambient temperature between -40°C to +60°C and oil temperature above -15°C and beyond +80°C. Type of oil is defined by producer and type of valve.
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