Hydraulics QUANTUM TIC
11-96 10/04
4.6.2 from serial no. H Manual actuation of iron core (E)
E Iron core
S Ram
V Valve
P Pump port
R Return line port
A Cylinder port
Function The valve (V) is pulled down by the compression spring (see figure). In this
process, the tapered valve seat closes the connection from port (A) to port
(P-R).
When the solenoid is deactivated, the load pressure of the cylinder (acting
at port A) is available in the rod end space of valve (V). The load pressure
cannot open the valve (V).
The connection from port (A) to port (P-R) is blocked.
This ensures that no oil can escape from the cylinder, which would result
in a lowering motion.
When the solenoid is activated, the iron core (E) presses the valve (V)
upwards via the ram (S).
The oil can
• flow from P to A = raising
• or from A to R = lowering
With manual operation, the valve (V) can be switched by hand.
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