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Worldwide Largest Agitator Seal
Delivered to China
2013-12-04 + + + For a major
project, EagleBurgmann delivered currently the largest agitator seal
(480mm shaft size) for use in a new PTA (Pure Terephthalic Acid) Plant in
China. The order received from SPX Flow Technology included 13 agitator
seals and supply systems. The dimensions and weight of the 1,500 kg
mechanical seal presented new challenges to the agitator OEM and the
engineers in Assembly and Trials. The agitator has a top entry drive
capacity of 2,800 kW and weighs 84 tons, with the gear weighing around 20
tons.
After a construction and production time of
merely 20 weeks, the agitator seal was tested in the presence of
representatives from the agitator OEM and Enduser customers at the modern
EagleBurgmann agitator test facility equipped with sophisticated control
and instrumentation technology as well as accurate measured data
acquisition. The seal was operated with a rotational speed of 58
revolutions per minutes. The cooling flange was heated to 80°C to simulate
the heat transferred by the product. "The seal exhibited no abnormalities
during the test run. All measured temperatures remained 'in the green',"
said EagleBurgmann's Sales Engineer Peter Totzauer. The test run ended
after an operating time of 100 hours. After a cooling down phase, the seal
was dismantled in the presence of inspectors so that they could jointly
examine the sliding surfaces and other components. All of the participants
and the construction, research and development specialists confirmed that
the test run had been more than successful and that there would be no
obstacles to a smooth and continuous permanent operation. The operator of
the plant expects a two-year operating period without interruptions.
Continuous availability of the seal is an absolutely vital criterion
because it is deployed in the crystallizer, which is the heart of the
system.
PTA is a pre-product of polyester that is used
in great amounts to manufacture textiles (90%) and PET bottles. The
continually increasing need for PTA demands ever greater capacities.
An overview of the
features:
Shaft
diameter 480 mm
Double seal for the medium pressure range
Hydraulically balanced
For top entry drive
Bi-directional
Ready for assembly cartridge type
Integrated radial bearings
Self-closing on the product side
Integrated cooling flange and cooled housing
Metallic materials in titanium executed on the
product side
Materials
Rotating seal faces: Carbon graphite
Stationary seats: Silicon carbide
Secondary seals of perfluorocarbon rubber (K)
and fluorocarbon rubber (V)
+ + +
EagleBurgmann - Rely on Excellence:
EagleBurgmann is among the internationally leading providers of industrial
sealing technology. Its products are used in applications wherever safety,
efficiency and reliability are essential considerations: for example in
the oil & gas, refinery, chemical, energy, food processing, paper, water,
marine, aerospace and mining industries. With their ideas, solutions and
commitment, around 6,000 employees at over 70 subsidiaries ensure every
day that customers throughout the world can rely on EagleBurgmann seals.
The modular TotalSealCare service reinforces the corporate group's
commitment to its customers and offers tailored solutions for any
situation
Source: Ellen Klier
www.eagleburgmann.com
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