Type 857

Combination hybrid double mechanical seal; media side stationary O-ring seal; atmosphere side: metal bellows for centrifugal and screw pumps, among others, for bitumen and asphalt
Further versions:
– 857S (special version)
Sizes also available in inch dimensions
Not all max. values may be claimed at the same time!
  • Design: double mechanical seal
  • Cartridge: Cartridge
  • Tandem / BtB: -
  • Speed: 25m/s
  • Standard: Factory - Standard, API 682 4th Ed. (incl. ES), ATEX
  • Balanced: balanced
  • Min. Ø Wave: 30mm
  • Max. Ø Wave: 100mm
  • Min. pressure: -
  • Max. pressure: 25bar
  • Min. Temperature: -25℃
  • Max. Temperature: 250℃

Wave:

Min: 30 mm

–

Max: 100 mm

Pressure:

–

Max: 25 bar

Temperature: 

Min: -25‎°C

–

Max: 250‎°C

Marsstraße 1

85551 Heimstetten b. München

Germany

Phone: +49 (0)89 32 94 64 – 0

Fax: +49 (0)89 32 94 64 – 20

Email: chetra@chetra.de

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