Why Are There So Many Problems With Pressure Reducing Valves?
Examples of some of the problems with pressure reducing valves we often hear about are a lack of ability to control secondary pressure, safety valves blowing or the opposite, almost no steam flow, and that the secondary pressure drops. Many users have experienced that normal operation can often be restored by cleaning the interior of the pressure reducing valve, but they also find that the restored normal operation is only temporary. As the fact that a thorough cleaning often restores normal operation might lead one to suspect, many of these kinds of problems with pressure reducing valves are due to the presence of foreign particulates such as scale or rust in the steam. There are a number of moving parts inside a pressure reducing valve, such as the piston and the pilot valve. A main cause of pressure reducing valve trouble is due to tiny particles of scale or rust getting into the gaps between these moving parts and preventing the parts from moving smoothly. It is also possible that
