Guiding cylinder with passive locking unit (ZFB)

Technical information

• Special guiding cylinder with external passive locking unit for arrest in case of pressure drop.
• The locking unit can be installed on any ZS standard cylinder.
• The passive locking cartridge applies its locking force in case the pressure in the working pressure circuit drops.
• The locking force is applied to an external sliding guide.
• The locking force is greater than the action force of the cylinder.

Addition for using the ZFB Guiding cylinder

The locking forces Fb listed in the dimensional table on page 35 refer to pure static loading.
Slipping may occur if these maximum values are exceeded. The acting forces in dynamic load scenarios must under no circumstances exceed the static locking forces.
In addition, the locking forces may be slightly lowered if the shaft is not dry.
When using rodless pneumatic cylinders, we generally recommend controlling the same using a 5/3-way valve with an open center position.
With respect to time, the valve circuit must be controlled in such a way that the yoke is loaded with pressurized air on both sides in case of an intermediate stop before the locking cartridge is depressurized.
When releasing, the cylinder should be pressurized on both sides in order to prevent any sudden movements of the yoke (risk of accidents).

ZFB Guiding cylinder with passive safety unit