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| 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
Recommended applications
- Gases
- Fumes and exhaust, solids containing, flammable (Atex), acid containing and toxic gases
- (Solids containing) steams / liquid mist
- Oil mist / penetrating oil
- Water
- Chemical industry
- Metal production and processing
- Pulp and paper industry
- Food processing industry
- Power plant technology
- Machinery and plant building
- CO2 transportation and storage
- Small and medium-sized fans / blowers
- Bearing seals (gear box, motors)
- Mixers, agitators, mills, dryers
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.
