PTFE Wedge seals | Heavy-duty Cartridge Seal for Boiler Feed Circuit Applications


Features mechanical seal Type 59U

  • California Residents: PROPOSITION 65 WARNING
  • Complies with European Standard EN 12756, formally DIN 24960, ISO 3069 and API 610 specification for the petrochemical industry.
  • A versatile design with multiple material options for the widest range of liquids and temperatures.
  • An unbalanced seal with the advantage of being a very short unit fitted to a straight through shaft.
  • Multiple S-rings ensure even face loading while compensating for acceptable shaft misalignment.

Recommended Applications Type 59U

  • Process pumps
  • Other rotating equipment

About Mechanical seal Type 59U

A DIN seal for general and high-pressure duties in the chemical, refinery, petrochemical and pharmaceutical industries. Alternative seat designs and material options are available to suit product and operating conditions of applications. Typically applications of a corrosive nature, cryogenic and high temperature.

Design Features mechanical seal Type 59U

  • Compact designs
  • PTFE or exfoliated graphite wedge secondary seal
  • Multispring design ensures even face pressure
  • DIN 24960/ISO 3069 stuffing box fit

Material mechanical seal Type 59U

  • Face/Primary Ring Resin-Impregnated Carbon Graphite Antimony-Impregnated Carbon Graphite
    Silicon Carbide-Coated Graphite Sintered Silicon Carbide
  • Seat/Mating Ring Sintered /Silicon Carbide Alumina Ceramic
    Tungsten Carbide
  • Seat O-ring/Mating Ring Nitrile Perfluoroelastomer
    Ethylene Propylene
  • Retainer 316 Stainless Steel Alloy 400 (Monel ®)
    Disc Alloy C-276 (UNS N10276)
    Snap Ring
    Seat Securing Ring
    Set Screws
  • Wedge / Pure PTFE/ Exfoliated Graphite
    Glass-Filled PTFE

Operating range mechanical seal Type 59U

  • Temperature Limits -60°F to 930°F/-50°C to 400°C
  • Pressure Limits 247 psi(g)/17 bar(g)
  • Speed Limits 5000fpm/25m/s

Product Description Type 59U

The Type 59U is an unbalanced multispring DIN 24960 seal with a short unit fitted to a straight-through shaft. The Type 59B is a hydraulically balanced multispring DIN 24960 seal giving low face loading at high pressures.

  • General chemical applications, oil refining, petrochemical, and pharmaceutical industries
  • Suitable for use with corrosive fluids and for cryogenic and high-temperature applications
    By choosing suitable component materials, the seals can be adapted to operate with a wide range of liquids and operating 
  • conditions