Espey WDMS500

Espey WDMS500 For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Item Description
1 O-Ring flange
2 Housing, 2-piece
3 Seal ring
4 Tension spring
5 Detent
6 O-Ring shaft sleeve
7 O-Ring bearing
  • Multipart seal rings, overlapped mortized with gas-tight joints
  • Split housing design
  • Lowest possible operation gap - lowest leakage
  • Dry running
  • Self-adjusting seal rings
  • Seal rings bear radial shaft movemnts
  • Compensates axial shaft movements
  • No sealing components mounted on the shaft and hence no additional shaft vibrations
  • Cooling sealing area for high temperature applications not required
  • Easy installation by split housing design (shaft removal not required)
  • Long-term operation time
  • Maintainability
  • Segmented seal rings for easy replacement
  • Robust
Shaft diameter:
d = 40 ... 220 mm (1.57" … 8.66")
Operating pressure:
p = vacuum … 6 bar (87 PSI) abs.
Operating temperature: t = -40 °C ... +500 °C (-40 °F … +932 °F) for carbon,
-40 °C ... +200 °C (-40 °F … +392 °F) for PTFE compound
Sliding velocity: vg = max. 5 m/s (16 ft/s)
Radial play: ±5.0 mm (±0.2")
Axial movement: theoretically unlimited (version without bearing),
± 2.0 mm (±0.08") (version with bearing)
Recommended wear guard: >58 HRC
Seal ring: Carbon, PTFE compound
Housing: 1.4571, others
Tension spring / detent: 1.4571
  • DIN 28154
  • DIN 28138
  • FDA
  • Chemical industry
  • Petrochemical industry
  • Food processing industry
  • Water and waste water technology
  • Gases*
  • Solids containing, flammable (Atex), toxic gases*
  • (Solids containing) steams / liquid mist*
  • Oil mist / penetrating oil*
  • Dust / powder*

* Sealing area

  • Agitators
  • Mixers
  • Dryers
  • Filters