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HERCULES DYR-BHT BUFFER SEAL

    DYR-BHT Buffer Seal

    Style DYR-BHT buffer seals are molded in Freudenberg® AU 30000 urethane. This U-cup style buffer ring offers an asymmetric sealing lip profile, chamfered sealing edges, and pressure relieving capabilities to prevent inner pressure entrapment when employed in a tandem sealing system. This rod buffer seal is designed to absorb impact pressure fluctuations under high-load conditions thus increasing the life of the primary seal. This high tear-resistant urethane demonstrates stability throughout a wide range of temperatures. In addition, this material is well suited to mineral and biodegradable hydraulic fluids as well as being resistant to hydrolysis.

    SEAL INFORMATION
    MATERIAL94A URETHANE “BU” INCLUDES POLYACETAL BACK-UP
    TEMPERATURE
    RANGE
    -31°F TO 250°F
    PRESSURE
    RANGE
    0 TO 8000 PSI
    SPEED1.5 FT/SEC
    Part NumberA
    Nom. ID
    B
    Nom. OD
    C
    Nom. Ht
    DYR28-1.50-12-BHT
    DYR28-1.75-12-BHT
    DYR28-2.00-12-BHT
    DYR31-4.00-22BU-BHT
    1-1/2
    1-3/4
    2
    4
    2-1/16
    2-5/16
    2-9/16
    4-5/8
    1/8
    1/8
    1/8
    3/16