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453/450 CYLINDER + DYNAMIC ROD-LOCKING DEVICE
HORIZONTAL MOUNTING
The cylinder is controlled by a 5/3 valve (ISO size 1 for diameters 40 and 50 mm, ISO size 2 for diameters 63, 80 and 100 mm), with
centre open to the central port (type W2 - fi g.1), or centre open to exhaust (type W3 - fi g.2), and supplied by exhaust ports 3 and 5. In
both options, the pressure is maintained on both sides of the cylinder piston and the forces exerted on it are balanced. This prevents
any accidental movement of the rod when it is disengaged. Type W2 is recommended for its simpler wiring. Do not use a 5/3 valve with
closed centre (type W1), since this will unbalance the piston in case one of the components in the circuit leaks.
NOTE: The cylinder rod may move out slowly after release of the system as a result of the "rod effect".
One-directional fl ow reducers must be used to control the rate of speed of the rod.
The rod lock device must be activated by a 3/2 NC solenoid valve, with a minimum passage diameter of 8 mm, to ensure fast braking
of the cylinder rod. Locking by absence of air.
W
Extend
Retract
control
control
4
2
2
14
12
5
3
3
1
1
Fig. 1 - Cylinder control with a 5/3 valve,
centre open on central port (type W2).
VERTICAL MOUNTING
The cylinder is controlled by a 5/3 valve (ISO size 1 for diameters 40 and 50 mm, ISO size 2 for diameters 63, 80 and 100 mm), with
centre open to exhaust (type W3), and supplied by the exhaust ports. To ensure that the lock functions properly, the force on the piston
which is generated by pressure - and which operates in the same direction as the load - must not exceed the locking capacity of the
device when it is combined to the force of the load (see table on opposite page).
Do not use a 5/3 valve with closed centre (type W1) since this will unbalance the piston in case one of the components in the circuit
leaks. This could be hazardous when the rod is disengaged.
Use of a 5/3 (type W3) valve provides a braking effect and ensures that the rod is held in a given position. The stopping precision
depends on the rate of speed of the rod and the loads in motion.
One-directional fl ow reducers must be used to control the rate of speed of the rod.
The rod lock device must be activated by a 3/2 NC solenoid valve, with a minimum passage diameter of 8 mm, to ensure fast braking
of the cylinder rod. Locking by absence of air.
Lifting
Lowering
control
control
4
2
2
14
12
W
5
3
3
1
1
Fig. 3 - Load underneath the cylinder
3835198
Retract
Extend
control
control
4
2
2
14
12
5
3
3
1
1
Fig. 2 - Cylinder control with a 5/3 valve,
centre open to exhaust (type W3).
W
Lowering
Lifting
control
control
4
2
14
12
5
3
3
1
Fig. 4 - Load on top of the cylinder
10
W
2
1
11
3835198
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