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ROTARY
VALVE |
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DAV
rotary valves are designed for use as an airlock in
dust collector material discharge, material metering
device for pneumatic conveyor and other powder feeding
purposes. Its internal chamber, vane tips and shaft
and bearing bores are precisely lathed. Tolerance between
vane tips and internal wall can be as close as one tenth
of a millimeter, depending on application and requirement.
DAV rotary valves comes in various types, helical geared
motor, worm geared & coupled, rubber vane, PU vanes
for food graded and metal vane with close tolerance. |
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DAV
makes high temperature rotary valve using stainless steel
253MA & SS310s that services at up to 1100degC. this top-of-its-range
product demands detailed fabrication procedure, expert welding
material selection, careful engineering consideration of thermal
expansion during service. |
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In
application with fine, corrosive material, our rotary
valve uses mechanical seal in place of conventional
oil seal or felt to prevent dust from exiting rotary
valve through shaft bores, and damaging bearings.
Picture at top right shows mechanical seal installed
on airlock, and bottom left is a alumina-silica sealing
felt that is rated for 1200degC. |
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DAV
rotary valve is factory tested for air leakage, ampere
and real time operation. An example of air leakage result
represented for rotary valve with 1.0mm blades tip to
wall gap. |
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Options
are available to polish internal compartment of airlock
to mirror-like for handling of sticky material. this
is used in food and beverage industries where material
are hygroscopic.
DAV has grown to be professional airlock maker. Our
airlocks are used widely, and many overseas.
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Copyright
© 2005 DAV ENGINEERING SDN BHD |
