Buffer Rings

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F O R U M

Buffer Rings
Buffer Rings buffer the pressure spikes of hydraulic systems. They act as a primary rod seal, and at the same time enable trapped fluid sealed by the secondary seal, which is down stream of the buffer, to be pumped back into the system. When a buffer ring is used in combination with a lip seal, the resulting sealing system provides long life with an exceptionally dry rod. Buffer seals are commonly
used for rod seal application only.

Style KR (standard)
Molded in PTFE with a rubber energizer, this seal absorbs the shock of pressure spikes protecting the rod seal .

Style DYR (standard)
DYR style buffer ring offers an asymmetric sealing lip profile, champhered sealing edges, and pressure relieving capabilities to prevent inner pressure entrapment when employed in a tandem sealing system.

Style CAT. 1pc Urethane
92 A URETHANE

Style CAT. 2pc PTFE/NYLON
Bronze Filled Ptfe Seal Rubber Energizer. Nylon

NOTE: Caterpillar® part numbers are used as a reference only. We do not imply that these parts are original equipment parts.

Style RBS
The RBS style rod buffer seals are a rectangular urethane buffer ring designed to absorb pressure fluctuations thereby protecting the primary rod seal. Some sizes include a radial and axial slot, which faces the pressure, to relieve back pressurebetween the primary and buffer seal.

Style MKR Metric
Filled PTFE Buffer. NITILE 70 Energizer

Style MYR Metric
URETHANE BUFFER. NYLON ENERGIZER

Style MNBR Metric
NYLON/PTFE BUFFER. NITRILE 70 ENERGIZER

Style MRT Cushion Seals Metric
FILLED NYLON OR REINFORCED PHENOLIC

Technical Resources

DMR Seal Design Sheet

DMR_ISO9001_2000_logo

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