Cassette Seals (CB CL CH), Heavy Duty Rotary Shaft Seals | Parker NA
687567
687567

Cassette Seals (CB CL CH), Heavy Duty Rotary Shaft Seals

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Parker cassette seals are used for fluid retention and extreme contamination exclusion in heavy duty applications operating in severe and harsh environments. The unitized design eliminates need for proper shaft surface finish and hardness.

Parker Cassette Seal
 Part(s)
Description
    Parker cassette seals (sometimes called hub seals) deliver durable reliability in demanding applications. These complex rotary shaft seals are used in heavy duty environments for fluid retention and exclusion of harsh contaminants. With a unitized method of construction, spring-loaded sealing elements ride on a self-contained internal wear sleeve surface. Multiple sealing contact points, as well as excluder lips may be integrated inside the wear sleeve surface and/or located on the OD. Designs with rubber covered metal OD casings provide improved sealing against the bore and are used for soft alloy housings.

    Cassette seals from Parker are used in extreme conditions such as:
    • Wash down applications on gear reducers used in food processing
    • Mining, agriculture and power generation applications with severe environmental debris

    Parker offers standard as well as custom cassette seal designs. Operating conditions and severity of the environment will dictate which design will meet your needs. Design options may include:
    • Excluder lips for added protection against contamination and pollution, water spray and debris
    • Patented axial face seal surface for dirt exclusion
    • ParKote™ sealant which fills small imperfections in the bore
    • Rubber covered OD for improved sealing due to thermal expansion

    Standard Designs:
    CB Profile: Metal case with ParKote™ bore sealant standard. Note: CB design requires special installation tool.

    CL, CH Profile: Rubber covered OD for improved OD sealing and soft alloy housing.

    Custom designs featuring additional or alternate sealing or exclusion contact points may be engineered for special conditions such as high misalignment, pressure or axial movement.

    Typical operating ranges for standard designs:

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

    Shaft Surface Speed: Up to 3200 fpm (16.3 m/s) depending upon pressure

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

    Size Range: 1/2 to 14 inches (10 to 350 mm)

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

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

    Typical Applications:
    For use in severe service for applications, reducers, gearboxes, torque hubs.
Description

Performance Characteristics

Shaft Diameter

0.500 to 14.000 inch
10 to 350 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

3200 ft/min
16.2 m/sec

Seal Type

Metal or Rubber-covered Metal Seal Casing

Shaft Seal Material

Rubber

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems...

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