MECHANICAL SEALS • PUMP SEALS • GLAND PACKINGS

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Type 21 Mechanical Seals (Metric Sizes)

$22.00$255.35

The Type 21, a general purpose seal, has become an industry standard with OEM designers.

Made of stainless steel, it provides a service range well beyond that which is possible with comparably priced seals of other metallurgical construction.

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Description

The Type 21, a general purpose seal, has become an industry standard with OEM designers.

Made of stainless steel, it provides a service range well beyond that which is possible with comparably priced seals of other metallurgical construction.

  • The positive static seal between the bellows and the shaft, along with the free movement of the bellows, means that there is no sliding action that could lead to shaft damage by fretting. This ensures that the seal will automatically compensate for normal shaft run-out and axial movements.

  • This versatile seal can be used on a wide range of equipment including centrifugal, rotary and turbine pumps, compressors, mixers, blenders, chillers, agitators, and other rotary shaft equipment.
  • Ideal for pulp and paper, pool & spa, water, food processing, wastewater treatment, and other general applications.

Performance Capabilities

  • Temperature: -40˚C to 205°C/-40˚F to 400°F (depending on materials used)
  • Pressure: Up to 11 bar g/150 psig
  • Speed: Up to 13 m/s / 2500 fpm (depending on configuration and shaft size)

Design Features

  • Self-aligning unit automatically adjusts for shaft end play and run-out.
  • Eliminates potential shaft fretting damage between the seal and shaft.
  • Positive mechanical drive protects the elastomer bellows from over stressing.
  • Single coil spring improves tolerance to clogging.
  • Simple to fit and completely field repairable.
  • Can be used with practically any type of mating ring.

Additional information

Size

14mm/.55 inch inside diam., 16mm inside diam., 18mm inside diam., 20mm inside diam., 22mm inside diam., 24mm inside diam., 25mm inside diam., 28mm inside diam., 30mm inside diam., 32mm inside diam., 33mm inside diam., 35mm inside diam., 38mm inside diam., 40mm inside diam., 43mm inside diam., 45mm inside diam., 48mm inside diam., 50mm inside diam., 53mm inside diam., 55mm inside diam., 58mm inside diam., 60mm inside diam., 63mm inside diam., 65mm inside diam., 68mm inside diam., 70mm inside diam., 73mm inside diam., 75mm inside diam.