Service, Experience, Innovation

Pneumatic and digital positioners

The TZIDC and EDP300 series digital positioners provide flexible and cost-effective valve management and control. Their durability and unmatched shock and vibration immunity up to 10 g and 80 Hz means that they are suitable for use even under harsh conditions.

TZIDC

 In a four month trial, an ABB tZiDc positioner underwent a customer durability test which saw it perform 1 million strokes without any deterioration in performance or fault or interruption.
Offering remote communication via 4 to 20 mA HArt, PrOFiBus PA or Foundation Fieldbus, the tZiDc sets the standard for safe and economic
control of industrial processes. its built-in intelligence enables it to adapt itself to any control valve at the push of a button, while a host of service, diagnostic and safety functions, including fail-freeze and fail-safe action, help to provide a high level of operational performance.
the tZiDc and eDP300 is suitable for use with linear, part-turn, and single or double-acting actuators and is protected to iP65/neMA 4X, making it ideal for harsh environments. you can rely on the tZiDc and eDP300 to provide the highest levels of availability, enabling you to maximise the profitability of your process through improved plant uptime.

EDP3000

Thanks to an innovative control algorithm taken from the field of robotics, the eDP300 positioner stands out thanks to its speed and accuracy.
Overshooting and slow recovery times are both prevented, allowing the eDP300 to significantly optimise compressed air consumption and energy
efficiency and reduce the ecological footprint of pneumatic control circuits.

Subsequently, the eDP300 is able to help reduce cost with its unique electro-pneumatic system, providing unsurpassed low air and gas consumption at a steady state. The eDP300 can also be used in applications with natural gas as an energy supply, eliminating the need for compressed instrument air.

I/P converters

The converter regulates the position of a small diaphragm valve with a 15 mm (0.59 in) stroke. The valve controls the flow over a range
of 50 to 2,000 l/h (13.20 to 528.34 gph), with an accuracy of ±3 to 5 l/h (±0.79 to 1.32 gph).

By responding less quickly to changes on the process side of the valve, the signal converter introduces a delay in the valve response so that
it effectively ignores any short term deviations caused by cellulose particles passing the valve. This helps to prevent the valve from becoming
blocked, even when it is only slightly open. The consequent reduction in unplanned plant downtime and associated production disruption help boost profitability and increase plant availability.

Key features and benefits:
  • Compact design and variable mounting positions for maximum installation flexibility
  • Output signal from 0.2 to 1 bar (3 to 15 psi)
  • Robust design with iP65 field housing enables use in arduous and hostile environments
  • High functional stability helps maximise control accuracy
  • Vibration immunity up to 10 g/80 Hz provides unsurpassed performance

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