W502 John Crane Type 502 Replacement Unitized Elastomer Bellows Seal For Pumps

Short Description:

The Type W502 mechanical seal is one of the best-performing elastomeric bellows seals available. It is suitable for general service and provides excellent performance in a wide range of hot water and mild chemical duties. It is specifically designed for confined spaces and limited glands lengths. Type W502 are available in a wide variety of elastomers for handing practically every industrial fluid. All components are held together by a snap ring in a united construction design and can be repaired easily on-site.

Replacement mechanical seals: Equivalent to John Crane Type 502, AES Seal B07, Sterling 524, Vulcan 1724 seal.

Product Detail

Product Tags

Product Features

  • With full enclosed elastomer bellows design
  • Insensitive to shaft play and run out
  • Bellows should not twist due to bi-directional and robust drive
  • Single seal and single spring
  • Conform with DIN24960 standard

Design Features

• Completely assembled one-piece design for fast installation
• Unitized 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
• 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

Operation Range

Shaft diameter: d1=14...100 mm
• Temperature: -40°C to +205°C (depending on materials used)
• Pressure: up to 40 bar g
• Speed: up to 13 m/s

Notes: The range of preesure,temperature and speed is depend on seals combination materials

Recommended Application

• Paints and inks
• Water
• Weak acids
• 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

Combination Materials

Rotary Face
Carbon graphite resin impregnated
Silicon carbide (RBSIC)
Hot-Pressing Carbon
Stationary Seat
Aluminium oxide (Ceramic)
Silicon carbide (RBSIC)
Tungsten carbide

Auxiliary Seal
Nitrile-Butadiene-Rubber (NBR)
Fluorocarbon-Rubber (Viton)
Ethylene-Propylene-Diene (EPDM)
Stainless Steel (SUS304)
Metal Parts
Stainless Steel (SUS304)


W502 dimension data sheet (mm)


  • Previous:
  • Next: