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Multi-part seal rings, radially cut on process side, overlapped mortised with gas tight joints on atmosphere side (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, -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
Metal production and processing
Pulp and paper industry
Lime, cement and gypsum industry
Food processing industry
Power plant technology
Machinery and plant building
CCUS
Power generation
CO2 transportation and storage
Gases
Fumes and exhaust, solids containing, flammable (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
Cantilever pumps
Product variants
Espey WD200/500-WD1S1
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD200/500-WD1S2
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD200/500-WD1S3
with barrier gas port. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced.
Espey WD 200/500-WD1S2A1
with barrier gas port and recirculation. The arrangement guarantees a focused barrier gas flow to the process side and keeps gases, solids and mists off the sealing area. In addition the leakage to the outside is reduced and residual gases and condensates will be purged.
Similar products
Espey Magna500+
the large seal for diameters from 500 mm