Hi list

Can anybody help about standard position feedbacks and actuators for industrial valves. Are there standard resistance values and if yes what are they or link to Web pages

Thanks in advance

Rolf

RG Electrical Engineering & Consulting
2 Little Street, Fannie Bay NT 0820
PO Box 37601, Winnellie NT 0821
Australia
Tel: ++61 (0)889 413 945
Fax: ++61 (0)889 419 280
Mobile: 0417 837 933

Allen Bradley System Integrator
Rockwell Strategic Software Provider

 

Hi,

Nowdays the signal is 4-20 ma is used, and the valve has to be powered exactly like the Pressure or temperature transmitters. Be carefull whether
- or + is earthed on the valve, because in this case you have to take care of the PLC input (Floating Input shall be used)

Valve Manufacturer MUST give you details of the valve position transmitter or even POSITIONER (Electro-pneumatic positioner)

In some older el. motor operated valves, there were resistance positioners, but nowdays nobody is using them.

Regards,

H. Zelenka

 

Look for Johnson Controls.

Tanweer Ahmed