Dear Doug
I am reading documents related to Pressure Regulating valve (PRV).
http://www.tyco-fire.com/TD_TFP/TFP/TFP1580_11_2007.pdf
I have one question regarding the working principle of Pressure Regulating Valve.
PRV maintains constant pressure at the outlet regardless of the variation in the inlet pressure.
It makes sense when the desired outlet pressure is less than the inlet pressure.
The documents says that the PRV can also maintain constant pressure if inlet pressure is low as compared to outlet pressure. (For me I think it as pressure boosting)
How is it possible to have higher outlet pressure as compared to inlet pressure? and I cannot figure out the scenarios in which we're having higher outlet pressure as compared to inlet pressure?
Regards