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Refcomm's Podcast

Mar 22, 2017

Host: Evan Hyde
The podcast pertains to Sliding Stem Pneumatic Control Valves. When a plant is operational there are numerous things that could cause control valve problems: 
- Hunting Valve 
- Positioner problems
- Handjack positions
- Leaks
- Packing problems
- Valve internal problems
- Flow problems
In summary, a good troubleshooting process looks like this:
1. Visually Inspect for loose fittings, leaks, general condition
2. Place valve in manual and verify stability
3. Return to auto control and monitor
4. Check positioner gauges and feedback arm
5. Analyze DCS setpoint, pv, and output
6. Repeat as needed to get the valve working…..
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