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TYPE 502

TYPE 502
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Elastomer Bellows Seal Industries Served Chemical Processing Conveyor and Industrial Equipment Cryogenics Food Processing Gas Compression Industrial Blowers and Fans Marine Mixers and Agitators Nuclear Service Offshore Oil and Refinery Paint and Ink Petrochemical Processing Pharmaceutical Pipeline Power Generation Pulp and Paper Water Systems Wastewater Treatment Water Desalination The Type 502 is a full convolution elastomeric bellows seal designed for confined spaces and limited gland depths. Self-aligning feature compensates for excessive shaft end play and run-out. Paints and Inks Water Weak Acids Industries include chemical processing, food processing, gas compression, marine, nuclear service, offshore, oil & refinery, paint & ink, petrochemical processing, pharmaceutical, pipeline, power generation, pulp and paper, wastewater, water desalination, water systems. Design Features/Benefits All types of rotary equipment, pumps, marine, mixers, agitators, blowers, fans and compressors in a variety of service applications. Supplied completely assembled for fast installation and field repairable. Fast Installation Completely assembled one-piece design for fast installation. Unitised Design Unitised design incorporates positive retainer/key drive from bellows. Non-Clogging, Single Coil Spring Provides greater dependability than multiple spring designs. Will not be affected by build-up of solids. Compact Design Full convolution elastomeric bellows seal designed for confined spaces and limited gland depths. Self-aligning feature compensates for excessive shaft end play and run-out. Operating conditions Temperature: -40°C to +205°C depending on materials used Pressures: up to 40 bar g Speed: up to 13 m/s

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TYPE 502 Elastomer Bellows Seal Type 502 Typical Arrangement/Dimensional Data (mm) CIRCULATION CONNECTION IMPELLER BOSS SPACER, SHAFT SHOULDER OR CIRCLIP, OR ABUTMENT RING (NOT SUPPLIED) BREAK EDGE 1.5MM RADIUS For ease of installation, the lead-in edge of the shaft or sleeve should be chamfered as shown. øD3 *Recommended chamfer lengths: The working length for both single, L1K, and double, 2 x L1K, Type 502 seals conforms to DIN 24960 without special spacer pieces being needed. Type 502 Dimensional Data (mm) Seal Size (mm) Seal Size Code Seal Size Code Hydrostatic Pressure Limits Pressure...

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TYPE 502 Elastomer Bellows Seal Pressure/Temperature Limits for Hot Water The graph shows maximum operating pressures/temperatures for seal sizes up to and including 68 mm when used with hot water above 80˚C. Pressure (bar g) 30 Seal Size 20mm 25 30mm 20 These pressure capabilities are based on the use of a carbon graphite face, a tungsten carbide seal and ethylene propylene elastomers. The limits are valid for shaft speeds of 3600 rpm maximum, with uncooled product recirculation. PV Multiplier Factors Selection Considerations Sealed Fluid Lubricity Face and Seat Materials Petrol, Kerosene...

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TYPE 502 Elastomer Bellows Seal Speed Limits Rotating seals may be used at speeds up to 4000 rpm according to seal size. Above the limit shown, it is necessary to stationary mount the seal unit and use a rotating seat. This would necessitate a special arrangement and would not conform to DIN 24960. Shaft Speed (rpm) 6000 Stationary Seal and Rotating Seat (For speeds above the limits shown, consult John Crane) Stationary Seat arrangement Rotating Seal and Stationary Seat Maximum Face Velocity 13 m/s Seal Size Elastomer Temperature Limits Compound Ethylene Propylene* † For hydrocarbon duties...

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TYPE 502 Elastomer Bellows Seal Criteria for Installation Housing Squareness to Shaft Axial Run-Out (mm) F.I.M. 0.24 Surface Finish End Play/ Axial Float Allowance Housing Squareness to Shaft See Housing Squarness to Shaft table Breakout (Starting) Torque Torque (Nm) 120 Fluid Pressure The above specifications are given for general guidance only, and cannot be exact for every installation. The operating parameters shown are the recommended limits for continuous operation, and can be exceeded by a reasonable amount for limited periods. If the required performance for continuous operation is...

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TYPE 502 Elastomer Bellows Seal Latin America São Paulo, Brazil Middle East, Africa, Asia Dubai, United Arab Emirates North America Morton Grove, Illinois USA For your nearest John Crane facility, please contact one of the locations above. If the products featured will be used in a potentially dangerous and/or hazardous process, your John Crane representative should be consulted prior to their selection and use. In the interest of continuous development, John Crane Companies reserve the right to alter designs and specifications without prior notice. It is dangerous to smoke while handling...

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