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To obtain valve position from site to control room

There are three choices that can be done to achieve this...

1) Replace the currently installed 3582 with a FIELDVUE DVC6200 SMART positioner. The device is HART certified and many parameters can be polled from the device to provide feedback to operations. You could poll the QV parameter to get travel readback. the problem is the current 3582 is a pneumatic instrument and replacing it with a DVC6200 would require that the I/O AO twisted pair wire would be present at the valve. The 3582 needs a pneumatic input from an I/P which could be mounted anywhere. If it is mounted at the valve this makes the change out super easy. If not that would be an expense to have wiring pulled to the valve.

2) Add a 4210 Position Transmitter. This is a wired 4-20mA transmitter so it would require that an AI twisted pair be present at the valve for power and mA feedback.

3) The easiest option is add a 4320 Wireless Transmitter, no wiring needed and calibration couldn't be easier. If the site already has a Wireless network (1420/1410) gateway then the expense is only the cost of the instrument and battery. The end user can then poll the desired parameter value via OPC or Modbus from the gateway. If they are DeltaV user even easier if the gateway is DeltaV native.

A few options available that vary in cost and complexity to install but easily done to get valve position feedback to the host system to display or utilize in a control strategy.  

1 Reply

  • Hi..Thanks for the suggestion. Actually there is an i/p transducer nearby. the cable can reused for new smart positioner. I may want to consider the wireless 4320 transmitter. Does this 4320 able to send % valve opening? Can it be mounted for the fisher EZ valve with 3582 positioner mounted on one side of stem and another opposite side with a manual valve handwheel.