Bi-directional Double Lip Spring Loaded Parker Oil Seal (DB DC DA) | Parker NA
687567
687567

Bi-directional Double Lip Spring Loaded Parker Oil Seal (DB DC DA)

Parker DB, DC, and DA rotary shaft oil seal profiles feature two opposite facing spring loaded elastomer lips with varying metal case designs for bi-directional fluid sealing, fluid separation or contamination exclusion.

Double Lip Spring Loaded Parker Oil Seal
 Part(s)
Product Overview
Description
    Parker DB, DC, and DA rotary shaft oil seal profiles feature two opposite facing spring loaded elastomer lips with metal case for general bi-directional fluid sealing, fluid separation or contamination exclusion. A stainless steel garter spring provides constant, uniform load of the each elastomer lip on the shaft for the life of the seal. The spring keeps the elastomer lip in contact with the shaft during higher shaft speeds and also helps offset normally occurring compression set and wear of the lip material.

    DB Profile: Single metal case with ParKote™ bore sealant or ground outside diameter. Used in metal or cast steel housing applications.

    DC Profile: Rubber covered metal case for improved OD sealing. Used in applications with soft alloy housings.

    DA Profile: Assembled dual case with ParKote™ bore sealant or ground OD. Used where structural rigidity is required and for blind shaft installation.

    Standard Lip Materials:
    NBR: Temp -20F / +250F
    FKM: Temp -40F / +400F

    Shaft Surface Speed: Up to 2000 fpm (10.2 m/s) depending upon pressure

    Maximum Pressure: 0 to 7 psi (0 to 0.48 bar) depending on shaft speed

    Size Range: 1/4 to 4 inches (6.4 to 101 mm)

    Maximum Shaft Dynamic Runout (TIR): 0.010” (0.254 mm)

    Maximum (STBM) Misalignment: 0.010” (0.254 mm)

    Typical Applications:
    For use in general pressure applications requiring bi-directional fluid separation or contamination exclusion.
Tech Specifications
Description

Performance Characteristics

Shaft Diameter

0.250 to 4.000 inch
6.4 to 102 mm

Polymer Material Options

Nitrile Butadiene Rubber (NBR, XNBR)
Fluorocarbon Rubber (FKM, FPM)

Minimum Operating Temperature

-40 °F
-40 °C

Maximum Operating Temperature

400 °F
204 °C

Maximum Shaft Runout

0.010"

Maximum Shaft-to-Bore Misalignment

0.010"

Maximum Operating Pressure

0 to 7 psi

Maximum Surface Speed

2000 ft/min
10.2 m/sec

Seal Type

Metal or Rubber-covered Metal Seal Casing

Shaft Seal Material

Rubber

Product Support

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