Espey WD200

Espey WD200
Item Description
1 Flat seal
2 Housing, 2-piece
3 Seal ring
4 Tension spring
5 Detent

Espey WD200

Features

  • Split housing design
  • Multi-part seal rings, radially cut
  • Very small operation gap - low leakage
  • Dry running
  • Self-adjusting seal rings
  • Seal rings bear radial shaft movements
  • Compensates axial shaft movements
  • No sealing components mounted on the shaft and hence no additional shaft vibrations
  • Seal rings running contact-free - sliding faces and machine consume no additional power

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 = 40 ... 340 mm (1.57" … 13.39")
Operating pressure:
p = vacuum ... 20 bar (290 PSI) abs.
Operating temperature: t = -120 °C ... +800 °C (-184 °F … +1,472 °F) for carbon,
max. 225 °C (437 °F) for PTFE compound
Sliding velocity:
vg = max. 150 m/s (492 ft/s) for carbon,
max. 40 m/s (131 ft/s) for PTFE compound
Radial play: ±1.0 … 5.0 mm (±0.04" … 0.2")
Axial movement: theoretically unlimited
Recommended wear guard: >300 HB (low pressure), >58 HRC (high pressure)

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-WDK
with short design and grease barrier port - type WDKF in addition with reduced outside housing diameter (for clean media, not for solids containing gases).
Espey WD200-WDKF
with short design, reduced housing outside diameter and grease barrier port (for clean media, not for solids containing gases).
For toxic and solids containing gases as well as Atex applications type shaft seal
Espey WD200-WDKS with short design, reduced housing outside diameter and barrier gas port (for e.g. toxic and solids containing gases as well as Atex applications, on special request).
Espey WD200-WDS
with barrier gas and grease barrier port (for e.g. toxic and solids containing gases as well as Atex applications, on special request).
Espey WD200-WDA
for applications involving condensate formation to enable directed throwing off to the outside of the housing.
Espey WD200-WDSA
with barrier gas, suction and grease barrier port (for e.g. toxic and solids containing gases with condensate formation as well as Atex applications).
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