The safety valve near my steam reducing station has suddenly started popping off. What is going on?
The most common cause is failure of the reducing valve, usually the pilot valve, or mis-adjustment of the pilot, leading to excess pressure on the outlet side of the steam reducing station. Sometimes there is a faulty gauge in the area of the reducing station, causing inaccurate adjustment of the pilot spring. We suggest that you replace the gauge and pilot valve and see if that cures the problem. If the safety valve has lifted frequently, the seating surfaces may be damaged.
