The BD Ultrathan® rod seal is a compact seal with a secondary sealing lip and an evolution of Parker’s Park-O-Pak® seal. The additional sealing edge results in a larger lubricant deposit in the sealing gap. This largely prevents increased wear and achieves longer service life. In addition, the need for a complex tandem arrangement may be eliminated by the second sealing lip in some cases.
Hydraulic cylinders in earth-moving machines are typical applications for this seal. They may involve pressure peaks of up to 1000 bar.

• Exceptionally high static and dynamic sealing performance.
• Enhanced sealing performance in non-pressurized conditions.
• Penetration of air into the system is largely prevented.
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Easier installation.
• Insensitive to extreme pressure peaks.
• Improved lubrication due to pressure medium deposit in the dynamic contact area.
• Extremely high extrusion resistance.
• Excellent media resistance in case of suitable compound selection.
• Suitable compounds available for special requirements of the chemical process industry.
• Suitable compounds available for special requirements of the food processing industry.
• Dimensions according to ISO 5597.
• Installation in closed and undercut housings.
• Low compression set.
• Further dimensions of machined series with short lead times available.

Range of application:
Mainly for sealing piston rods and plungers in heavy-duty mobile and stationary hydraulic applications.

The BD rod seal is available in the following compounds:
00042 - Heavy-duty
00043 - Low temperatures
00570 - Bio-degradable fluids

Rod seal Prädifa series BD, Ultrathan®