Rod sealing set Prädifa series ZJ

The ZJ rod sealing set is a multi-component compact seal with an anti-extrusion ring. It is suitable for hydraulic actuators in shield tunneling machines and heavy earth-moving machines. The seal consists of a rubber element with a fabric-reinforced dynamic surface. Even after prolonged standstill, this ensures low break-away friction and low friction in the movement of the piston rod.
The sealing set is extremely wear-resistant, resistant against pressure peaks and reliable even in the most adverse conditions (water or particle contamination).

• Exceptionally high static and dynamic sealing performance.
• Enhanced sealing performance in non-pressurized conditions.
• Robust seal profile for harshest operating conditions.
• Insensitive to contamination of the operating medium or slight damage of the sliding surfaces compared with single-part seals.
• Good wear resistance.
• Long service life thanks to application-optimized compounds.
• Constantly low dynamic friction throughout the part's service life.
• Insensitive to extreme pressure peaks.
• Improved lubrication due to pressure medium deposit in the dynamic contact area.
• Extremely high extrusion resistance.
• Simple fabrication of the housing.
• Installation in open housings.

Range of application:
Hydraulic mining roof support shield actuators and heavy-duty earth-moving cylinders.