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jlrii · 02-15-2005, 04:21 PM

Confused here....what are you going to use those for? I don't know much about process automation but those actuators look huge for the size of the valve body. Magnetic actuators perhaps? Are you using feedback? If so how acurate must it be? I may have some older Staefa (Siemens) magnetic valves hanging around....will look at sizes. They are very acurate and originaly worked on 0-20v phase cut, but a wigit is available to convert them to 0-10v (24v power). Unsure if they have any have feed-back. But the actuators are a hell of a lot more managable. Do you plan on monitoring flow and using it to control the valve w/ a pid? If so what resolution do you need, is 8 bit ok or do you need 16 bit?

Edit:Huh...Invensys bought out Foxboro, I was wondering what happened to them, They used to be just around the corner from me, thought they went belly up.

02-15-2005, 04:21 PM	#11
jlrii Cooling Savant Join Date: Feb 2004 Location: Massachusetts, USA Posts: 158	Confused here....what are you going to use those for? I don't know much about process automation but those actuators look huge for the size of the valve body. Magnetic actuators perhaps? Are you using feedback? If so how acurate must it be? I may have some older Staefa (Siemens) magnetic valves hanging around....will look at sizes. They are very acurate and originaly worked on 0-20v phase cut, but a wigit is available to convert them to 0-10v (24v power). Unsure if they have any have feed-back. But the actuators are a hell of a lot more managable. Do you plan on monitoring flow and using it to control the valve w/ a pid? If so what resolution do you need, is 8 bit ok or do you need 16 bit? Edit:Huh...Invensys bought out Foxboro, I was wondering what happened to them, They used to be just around the corner from me, thought they went belly up. Last edited by jlrii; 02-15-2005 at 04:45 PM.