Mechanical seals

Mechanical seal Type 385

The type 385 is a stationary, tandem-active double mechanical seal. Specially designed to meet the requirement of the petroleum industry, the type 385 is equipped with a barrier space with a patented pump construction and barrier fluid diversion.

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Advantages
  • Cartridge-mounted
  • Stationary design principle
  • Double balanced
  • Full pressurisation is possible on pump side and barrier side
  • Self-closing in case of pressure reversal
  • Tandem active
  • Independent of the direction of rotation
  • Shock and vibration-dampend faces
  • "Floating" safety seal
Technical details
Range of application  
Pressure 700 mm Hg, 28 bar
Pressuretabelle Atmosphäre = 0 bar  
Medium pressure Barrier pressure
28 * 0
28 28
0 28
* only for lubricating liquids  
Temp. depending on Elastomer
Speed. 35 m/s
   
Sizes  
Dshaft 20 - 110 mm
  7/8“ - 4 ¼“
Materials  
Metals DIN 1.4571 / Hast. C
Springs Hast. C
Faces CA, SC, SSIC, TC
O-Rings FKM, EPDM, PTFE, FEP Umm., Chemraz, Kalrez, Aflas, etc.

Other sizes, materials or design variations upon request.