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Slurry & Abrasive Applications
Due
to the extensive use of I.T.T Dia-Flo valves throughout the
industry, specialised applications have become a major factor,
non more so than slurry duties. Due to a streamlined flow
path and virtually no cavities for product entrapment, the
weir type Dia-Flo valve is ideally suited for the job. On
heavy and denser slurries, the Straightway Diaphragm Valve
is recommended.
For
abrasive products, five different rubber linings are available
to deal with even highly corrosive media.
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Innovative
Design
A
common complaint regarding diaphragm valves is that an over
zealous operator can damage the diaphragm if they over tighten
the hand wheel. This problem has been ironed out with the
Dia-Flo valve due to its unique diaphragm compressor. Here,
unlike other diaphragm valves, there is no 'point loading'
on the diaphragm itself, the place where most damage occurs,
instead the Dia-Flo valve incorporates a large compressor
pad that spreads the load evenly throughout the diaphragm.
This is aided by way of a floating tube nut that guides the
diaphragm into the seating area. As soon as pressure builds
up on the tube nut, by the operator tightening the hand wheel,.
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it
retracts back into the valves shaft to allow the compressor
pod to continue down and close the valve.
Actuation
& Control
The
I.T.T Dia-Flo range of diaphragm valves also includes a complete
range of pneumatic actuators allowing for spring return, both
fail closed and fail open, double acting, and special bonnets
are available should the customer request a different actuator
type. Another innovation available is the Dualrange control
valve. Here special attention is given to the compressors
inside the valve bonnet, clever amnipulation of teh diaphragm
allows for fine control over the flow path to give a highly
accurate controlled response.
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