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Industrial Dampers & Metal Expansion
Joints
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Turner EnviroLogic manufactures dampers and expansion
joints for all types of industrial processes. Originally
manufactured to support and complement our other air pollution
control products, we now offer dampers as stand alone
products. Dampers are constructed of a variety of
materials depending on the temperature and corrosiveness of
the exhaust stream. Low leakage rates down to 0.5% are
possible using resilient blade seals. Expansion joints
are constructed of stainless steels and are insulated to
protect the safety of operating
personnel.
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Dilution air dampers are
applied to introduce fresh air into the inlet of thermal oxidizers
and wet scrubber systems. Dilution air mixes with waste
stream gases to cool or reduce the concentration of air
pollutants
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Atmospheric
or gravity
dampers ensure that
the vacuum pressure in a duct system do not get so high as to
damage the duct system. A counter weight balances the damper
against the internal duct
pressure.
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Process Isolation
dampers coupled with fresh air
dampers are used when air pollution equipment
such as thermal oxidizers or wet scrubbers must be started up
prior to the introduction of waste gases into the equipment.
Upon start up the isolation damper is closed and the fresh air
damper in open. Once the air pollution control equipment is
on line, the isolation damper opens and the fresh air damper
closes allowing process gas to be treated.
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High temperature dampers
include a ceramic refractory lining and specialized
stainless steel construction to handle temperatures in excess of
2,000 oF. The shaft bearings and electric or pneumatic
actuator are isolated from the high temperature through the use of
heat shields and cooling fins. The design of the high
temperature damper allow the shaft and blade to expand at the high
operating temperatures. These dampers are used in thermal
oxidizer hot gas by-pass applications and in wet scrubber
systems.
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Metal
Expansion Joints are used to protect duct work
and equipment subject to thermal expansion due to high process gas
temperatures. Typical applications include the connection
between power generating turbines and Selective Catalytic
Reduction (SCR) systems. Expansion joints are also applied
in wet scrubber quench systems. The metal bellows take up
the dimensional changes as the duct work expands from heat.
Turner EnviroLogic expansion joints are made from high grade
stainless steels and are fully welded to eliminate leakage.
We insulate the expansion joint so operating personnel are
protected from high temperatures. Multiple bellows allow
dimensional changes from ½” to
6”.
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