Espey WKA300

Espey WKA300
Item Description
1 Seal ring
2 Tension spring
3 Chamber
4 End ring
4.1 Welding ring (as alternative)
5 Flat seal
6 Grease chamber
6.1 Barrier gas, suction chamber
7 Intermediate chamber

Espey WKA300

Features

  • Multi-part seal rings, radially cut
  • Chamber seal (modular design – can be combined in any order)
  • 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

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

Operating range

Shaft diameter:
d = 20 ... 340 mm (0.79" … 13.39")
Operating pressure:
p = vacuum ... 1.5 bar (22 PSI) abs.
Operating temperature: t = -120 °C ... +500 °C (-184 °F … +932 °F) for carbon, max. 225 °C (437 °F) for PTFE compound, max. 300 °C (572 °F) with grease
Sliding velocity:
vg = max. 150 m/s (492 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: >300 HB

Materials

Seal ring: carbon, PTFE compound
Chamber parts: 1.4571, Hastelloy®, Titanium, Inconel®, others
Tension spring: 1.4571, Hastelloy®, Titanium, Inconel®

Standards and approvals

  • FDA



Product variants

Espey WKA301/4
(up to 225 °C (437 °F)) or
Espey WKA302/4
(up to 500 °C (932 °F)) for clean media, not for solids containing gases
Espey WKA303/4
(up to 225 °C (437 °F)) or
Espey WKA304/4
(up to 500 °C (932 °F)) with grease barrier for clean media, not for solids containing gases
Espey WKA303.1/4
(up to 225 °C (437 °F)) or
Espey WKA304.1/4
(up to 500 °C (932 °F)) with grease barrier for clean media, not for solids containing gases
Espey WKA303.2/4
(up to 225 °C (437 °F)) or
Espey WKA304.2/4
(up to 500 °C (932 °F)) with barrier gas port for toxic and solids containing media as well as Atex applications, on special request.
Espey WKA305/4
(up to 225 °C (437 °F)) or
Espey WKA306/4
(up to 500 °C (932 °F)) with grease barrier for clean media, not for solids containing gases
Espey WKA305.1/4
(up to 225 °C (437 °F)) or
Espey WKA306.1/4
(up to 500 °C (932 °F)) for clean media, not for solids containing gases
Espey WKA305.2/4
(up to 225 °C (437 °F)) or
Espey WKA306.2/4
(up to 500 °C (932 °F)) with barrier gas port for toxic and solids containing media as well as Atex applications, on special request.
Espey WKA308/4
(up to 225 °C (437 °F) or
Espey WKA309/4
(up to 500 °C (932 °F)) with grease barrier for clean media, not for solids containing gases
Espey WKA308.1/4
(up to 225 °C (437 °F)) or
Espey WKA309.1/4
(up to 500 °C (932 °F)) for clean media, not for solids containing gases
Espey WKA308.2/4
(up to 225 °C (437 °F)) or
Espey WKA309.2/4
(up to 500 °C (932 °F)) with barrier gas port for toxic and solids containing media as well as Atex applications, on special request.
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