Valve actuator approval
Valve actuator approval
(OP)
Hello,
This is my first SD valve design activity and I need to approve the GA drawings for the selected actuator (air operated,Eex d, Worm Gear or similar, mounted on the valve at an angle). I'll just like to know if there any standard or usual points to look out for in accepting the vendors drawings. Our specification was quite basic.
Thanks.
bobo
This is my first SD valve design activity and I need to approve the GA drawings for the selected actuator (air operated,Eex d, Worm Gear or similar, mounted on the valve at an angle). I'll just like to know if there any standard or usual points to look out for in accepting the vendors drawings. Our specification was quite basic.
Thanks.
bobo





RE: Valve actuator approval
Air requirements:
1) Quality/filtration of air
2) min-max pressure
3) min-max flow rate
4) fail state; open or closed
Also calibration and/or mechanical adjustment requirements.
David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: Valve actuator approval
I typically buy from a limited number of vendors. I usually don't do much more than cursory check of their drawings, if that.
I usually check the valve's datasheet against mine. This it to confirm the typical stuff, like David saig:
- fail open/close position is correct
- the correct model and size of valve
- the correct "stuff" is included
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
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RE: Valve actuator approval
Going the Big Inch!![[worm] worm](https://www.tipmaster.com/images/worm.gif)
http://virtualpipeline.spaces.msn.com