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Advances in control valves, valve actuators and positioners are changing the shape
of industrial automation and control for plant engineers.
Examples include: a digital valve controller (electronic positioner) with automated
diagnostics; and a wireless plug-in for accessing valve maintenance data even on
plants running with older 420mA control systems. Then there are: new packings and
seals, to reduce fugitive emissions; improved valve trims, for plant noise reduction
and increased valve life; and valve controllers with contactless feedback, cutting
out mechanical actuator linkages and, again, improving maintenance-free control
valve life expectancy.
Plant Engineer's coverage of valves, actuators and positioners includes even a lowly
butterfly valve now turned from shut off valve into rotary control valve with ball
valve or globe valve performance.
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Pole position
Although control valve, actuator and positioner technologies develop only relatively slowly, there have been advances that offer practical, ...
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Control Revisited
Control valves, actuators and positioners aren't renowned for rapid technological development, but advances are changing the shape of best practice. ...
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Instruments for control
Help is at hand for plant engineers facing up to the challenge of handling instrumentation and control. Brian Tinham reports on recent developments...
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Control valves best practice
Only carefully selected, installed and maintained control valves will manage fluid flow as intended. Brian Wall provides back-to-basics advice...
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Opening up on control valves
There are three key steps to ensuring that control valves don't cause process plant instability. Mark Perry explains the problems and their solutions...
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