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Espey WD200 for Sealing Dust Collection System Blowers


Photo courtesy of Illinois Blower Inc.

In petrochemical processes, several blowers for material handling or pressure increases are needed. The American customer operating in the petrochemical industry has chosen a leading Midwest company as their supplier for blowers, providing the latest technology for a dust collection system within a reactor system.


Process description

The reactor in a petrochemical process works as a separator. Heated fuel oil vapor with a temperature of 1,202°F (650°C) is split into its heavy and gaseous components through the process of cracking. The gaseous components are transported downstream to a distillation tower. To provide this tower with clean

cracked gas, the reactor contains a pressurized dust collection system, powered by a blower, to collect particles generated by material handling within the reactor system and the primarily inert gas. This system has to be maintained at high pressure and elevated temperature.

Problem and challenge

For the small space between the blower housing and shaft bearing, the seal has to have a small axial installation length, a maximum of 2.76” (70 mm). The operating temperature is 167°F (75°C). The shaft rotates with 3,000 revolutions and has a diameter of 2.17” (55 mm). The operating pressure is 72.52 PSI (5.0 bar abs). The medium is cracked process gas containing contaminants. The seal incorporates a provision for a buffer gas connection to keep process gas and dust contaminants within the reactor system and not passing into the seal. As nitrogen buffer gas is used, the buffer gas connection has to be designed in the form of a flange for maintenance purposes.

EagleBurgmann Espey's Solution

To fulfil the application requirement of low leakages at operating temperature, Espey designed the Espey WD200 type WDKS carbon floating ring seal with split housing for easy installation and maintenance, fit with five seal rings and a buffer gas connection in a flange design for easy repair. This seal guarantees a long-term operation time.

Operating Conditions

Application: Blower
Seal type: Espey WD200, type WDKS
Medium: Cracked process gas
Operating temperature: 167°F (75°C)
Pressure: 72.52 PSIA (5.0 bara)
Revolutions: 3,000 min-1
Shaft diameter: 2.17” (55 mm)
Barrier gas: Nitrogen

For more information on the Espey WD200 seal, please contact us at info.us@eagleburgmann.com.

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