Espey WD200/500

Espey WD200/500
Item Description
1 Flat seal
2 Housing, 2-piece
3a Seal ring WD 200
3b Seal ring WD 500
4a Tension spring WD 200
4b Tension spring WD 500
5a Detent WD 200
5b Detent WD 500

Espey WD200/500

Features

  • Multi-part seal rings, radially cut on process side, overlapped mortised with gas tight joints on atmosphere side (adjusting)
  • Split housing design
  • Lowest possible operation gap - lowest leakage
  • Dry running
  • Self-adjusting seal rings
  • Seal rings bear radial shaft movements
  • Compensates axial shaft movements
  • Short axial installation length
  • No sealing components mounted on the shaft and hence no additional shaft vibrations

Advantages

  • Easy installation by split housing design (shaft removal not required)
  • Long-term operation time
  • Maintainability
  • Segmented seal rings for easy replacement

Operating range

Shaft diameter:
d = 45 ... 340 mm (1.77" … 13.89")
Operating pressure: p = vacuum ... 3 bar (44 PSI) abs. (depends on peripheral velocity)
Operating temperature: t = -120 °C ... +500 °C (-184 °F … +932 °F) for carbon,
-120 °C ... +150 °C (-184 °F … +302 °F) for PTFE compound
Sliding velocity:
vg = max. 40 m/s (131 ft/s)
Radial play: ±2.5 … 5.0 mm (±0.1" … 0.2")
Axial movement: theoretically unlimited
Recommended wear guard: >58 HRC

Materials

Seal ring: Carbon, PTFE compound
Housing: 1.4021, 1.4571, Hastelloy®, Titanium, Inconel®, others
Tension spring / detent: 1.4571, Hastelloy®, Titanium, Inconel®

Standards and approvals

  • FDA



Product variants

Espey WD200/500-WD1S1
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD200/500-WD1S2
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD200/500-WD1S3
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD 200/500-WD1S2A1
with barrier gas port and recirculation. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced and residual gases and condensates will be purged.
False