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API 610/682 Cartridges - Double








 Type 385
         Stationary Double Mechanical Seals
  • O-ring design
  • API connections
  • Barrier space with patented pump design
  • Tandem-active arrangement
  • "Floating" safety seals
  • Double balanced
  • Barrier fluid shroud
Convincing Arguments!

Applications in the petroleum industry involve the most diverse media, from water to highly volatile hydrocarbons, from chemical compounds to acids and alkalis.

For these manifold applications DEPAC has a matching array of mechanical seal designs with O-ring, bellows or rolled bellows. DEPAC offers seal alternatives which can be adapted in accordance with API recommendations in consultation with the user.

Only the O-ring version is presented as it alone can cover the majority of applications.

API also gives details of certain test values which the mechanical seals should satisfy or which the seal manufacturer should verify. Please consult DEPAC if you want these values to apply to the use of DEPAC mechanical seals.
Notes:
As a precaution when using cartridge seals at operating pressures above 15 bar the user is required to drill the shaft or sleeve where the set screws are to be tightened or to secure the cartridge sleeves against axial slip.
Links
Dimensions Table and Drawing

<< Overview
Depac-Advantages
  • Stationary design principle
  • Cartridge-mounted
  • Double balanced
    Full pressure rating possible on pump side AND barrier side
  • Self-closing in case of pressure reversal
  • Tandem-active arrangement
  • Independent of the direction of shaft rotation
  • Shock and vibration-dampend faces
  • Springs outside the medium
Technical Data
RANGES OF APPLICATION
Pressure 700 mm Hg (28" HG), 40 bar (600 PSI)
Pressure table atmosphere = 0 bar (0 PSI)
Medium pressure
 Barrier pressure
28 bar (420 PSI) *
 0
28 bar (420 PSI) 28 bar (420 PSI)
0
 28 bar (420 PSI)
* Only for lubricating liquids
Temperature
 Depends on the elastomer
Speed
 35 m/sec. (7000 FPM)
   
SIZES
Dshaft
 20 ... 110 mm
  7/8'' - 4 1/4"
   
MATERIALS
Metals
 DIN 1.4571, 316 SS / Hastelloy C
Springs
 Hastelloy C
Faces
 CA, SC, SSIC, TC
O-Rings
 FPM, EPDM, PTFE, FEP encaps., Chemraz, Kalrez, Aflas, etc.
   
Other sizes, materials or design versions on request.
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