HELI G3 Series, Руководство по эксплуатации и обслуживанию

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The multi-way valve is a piecewise multi-way valve. The hydraulic oil from the
working oil pump is controlled by a multi-way valve lever, which distributes the high
pressure oil to the lifting or tilting cylinder and returns the oil to the tank. The shape of the
multi-way valve is shown in the following figure.
Figure 5-2 Multi-way control valve
This multi-way valve has a pressure compensator and a system safety valve built in the
oil intake piece. The balance valve is built in tilting piece for overload control. Its main
function is to prevent the vibration caused by negative pressure inside the tilting cylinder and
to prevent the serious consequences of load movement caused by misoperation of the valve
stem in the case of no pressure source. Each valve is equipped with shuttle valves, whose
function is to feed back the sampled instantaneous load signals to the pressure compensator.
Pressure compensator continuously regulates the flow through the valve core, and maintains
a constant pressure difference between the pump and the working oil port side of the valve
core, which makes a constant flow to the working device corresponding to a certain rod
stroke, and is not affected by the load pressure, and has good operation comfort. The
multi-way valve is equipped with a displacement sensor (as shown in the figure below), and
the tilt piece and the auxiliary piece are equipped with a stroke switch (remove the end cover
of the end of the stem and install the stroke switch, as shown in the figure below).