Hydraulics QUANTUM TIC
11-52 10/04
Pressure balance, pressure
build-up, floor conveyor
forward, pressure relief
valve 200 bar
In neutral position, the ports A, B and T of the 4/3 way solenoid valve are
connected with one another.
When solenoid 25 is activated, P1 is connected with A and B with T1.
Vie the deactivated solenoid valve 14, the open shut-off valve 22 and the
restrictors 24, the system pressure from the hydraulic motor acts on the
rear side of pressure balance 20 (spring space).
The force available in the spring space of the pressure balance now
exceeds the opening force - pressure balance 20 remains closed. Oil
flows from P1 to A to the hydraulic motor.
When the system pressure rises to above 200 bar, the pressure relief
valve 21 opens.
Reverse conveyor floor The solenoid valves 14 and 12 are activated.
The pressure balance 20 assumes the closed condition.
Oil flows from P to the floor conveyor hydraulic motor via the activated
solenoid valve 12.
The floor conveyor is reversed at maximum speed.
3/2 way master valve
solenoid valve
This valve (14) deactivates the pressureless circulation and/or switches
the pressure balance function off.
If pressure must be built up for moving a unit, this valve (14) is activated
along with others.
The system pressure P1 is held by the ball. The pressure balance line is
connected with the return line via the 4/3 way solenoid valve from A to
T1. When solenoid 14 is activated, the connection from A to T1 is shut off
and the ball is opened.
The system pressure therefore acts on the rear side of pressure balance
20, shutting off the circulation and building up pressure.
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