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Multi-part seal rings, overlapped mortised with gas tight Joints (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 [700 °C (1,292 °F) for blast furnaces], -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
Recommended applications
Chemical industry
Waste incineration and removal industry
Pulp and paper industry
Lime, cement and gypsum industry
Mining industry
Water and waste water technology
CO2 transportation and storage
Gases
Fumes and exhaust, solids containing, flammabale (Atex), acid containing and toxic gases
(Solids containing) steams / liquid mist
Oil mist / penetrating oil
Water
Medium-sized and large fans / blowers
Bearing seals (gear box, motors)
Steam turbines
Mixers, agitators, dryers
Mills (ball, hammer, beater mills)
Centrifuges
Product variants
Espey WD500-WDS with barrier gas port (for e.g. toxic and solids containing gases).
Espey WD500-WDA
for applications involving condensate formation to enable directed throwing off to the outside of the housing (not for solids containing gases).
Espey WD500-WDK
with short design (for clean media, not for solids containing gases).
Espey WD500 Special
as blast furnace seal
Similar products
Espey Magna500+
the large seal for diameters from 500 mm