Espey WKA250ND

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Espey WKA250ND

Espey WKA250ND
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Item Description Variable
for width
1.1 Seal ring
1.2 Tension spring
2 Chamber A
2.1 Chamber with O-Ring A
3 Barrier gas chamber B
3.1 Barrier gas chamber with O-Rings B
4 Lantern chamber C
4.1 Lantern chamber with O-Ring C
5 Lantern thin E
5.1 Lantern wide F
6 End ring G
7 Flat seal H
8* Housing
9* Lid
10* O-Ring housing


* On request

Espey WKA250ND

Features

  • Chamber seal (modular design – can be combined in any order), optional with housing and lid
  • 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
  • Balanced seal ring inside chamber

Advantages

  • High reliability
  • Long-term operation time
  • Maintainability
  • Segmented seal rings for easy replacement

Operating range

Shaft diameter:
d = 20 ... 340 mm (0.79" … 13.39")
Operating pressure:
p = vacuum ... 15 bar (218 PSI) abs.
Operating temperature: t = -120 °C ... +500 °C (-184 °F … +932 °F) for carbon,
max. 225 °C (437 °F) for PTFE compound
Sliding velocity:
vg = max. 240 m/s (787 ft/s) for carbon,
max. 40 m/s (131 ft/s) for PTFE compound
Radial play: ±2.0 mm (±0.08")
Axial movement: theoretically unlimited
Recommended wear guard: >58 HRC

Materials

Seal ring: Carbon, PTFE compound
Chamber and housing parts: 1.4021, 1.4571, Hastelloy®, Titanium, Inconel®, others
Tension spring: 1.4571, Hastelloy®, Titanium, Inconel®,
Secondardy seal (elastomer): Fluorocarbon rubber (Viton®), Nitrile-butadiene-rubber (Perbunan®), Perfluorocarbon rubber (Kalrez®)
Secondary seal (flat gasket): Statotherm®-HT/HD, KSiL C 4400

Standards and approvals

  • FDA

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The Eagleburgmann Group

Sealing technology for plants and machines

EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.

Mechanical seals and more

Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.

What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.

EagleBurgmann WORLDWIDE