The flow regulator valve located in the lift
cylinder circuit is to limit the descending speed
of loaded forks, and support when there are
accidents, such as bursting because of high
pressure, its construction is referred to Fig. 7-6.
▲ Operation of flow regulator valve
(Fig.7－7)
When the lift spool is placed in the “lift”
position, the oil from the control valve flows
through the oil chambers A and B, oil holes C,
D, E and F, and the chamber G to the lift
cylinder without any regulation. When the lift
spool is placed in the “down” position, the oil
flows in the reverse direction. When much oil
passes the orifice plate, the pressure difference
overcomes the force of the spring and moves
the valve core right, thus the oil flow being
decreased by narrowing of the hole D and C,
and reduces the oil flow passing through the
orifice plate, the descending speed of the fork
becomes slower.
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