The travel indicator shows the regulator is wide open but it doesn’t flow the published rate. What could be wrong?
When a regulator appears unable to pass the published flow rate, be sure to check the inlet pressure measured at the regulator body inlet connection. Piping up to and away from regulators can cause significant flowing pressure losses. How can a regulator freeze when the ambient temperature is 40° F. For every 15 psid (1,0 bar, differential) pressure differential across the regulator, expect approximately one degree drop in gas temperature due to the natural refrigeration effect. Freezing is often a problem when the ambient temperature is between 30° and 45°F (-1° and 7°C).
