PRV Sizing and Startup
How to size and select a pilot operated PRV?
1. Determine required outlet steam pressure and flow requirement in lbs/hr (safety factors are normally not needed).
2. If the steam pressure reduction is greater than 10:1 two valves in series may be required please contact us for review and support.
3. If the steam flow turndown required is greater than 10:1 two valves in parallel may be required please contact us for review and support.
5. Watch the following video to impliment best piping practices for a steam prv station.
6. If a saftey relief valve is required it must be able to handle the maximum capacity of the valve(s) at the maximum differential between the upstream pressure and relief valve set point.
7. Note: Properly piped systems should have different inlet and outlet pipe sizes due to the increased specific volume of steam at lower pressures.