Distinction if any between Pressure/Vacuum relief Valves and Breather Valves.Breather Valve = Pressure Relief Valve + Vacuum Relief Valve,A Breather valve for a tank requiring IN-breathing and OUT-br

Going through one P&ID of gas processing facility I have been working. What are the reasons behind placing RO-restricted orifice after control valve/valve?

Need a 42 inch swing check valve for raw sewage service. Due to piping limitations, I am looking for a short body (such as wafer style) swing check valve for sewage application.

Working on a project and wondering on why is it necessary for there to be "long bolted" valves? For example I noticed long bolted wafer valves in a fire hazard the bolt melt off and simply leak materi

The difference between the lug and wafer type butterfly valves and when are these specified? I can't seem to find a clear definition of each.

The difference beetwen KOLSTERISING hard face treatment and STELLITE.Stellite is a commercial name of a cobalt-chrome alloy available in different grades and with high wear resistance features

6 pcs of 38" triple-offset butterfly valves are passing (more than 50% of number installed). The valves worked fine for about 12 months. Increasing the torque from 75% to 100% didn't help.

Further to the comment about the rotameter: there are "Purge rotameters" with constant flow controllers that modulate to hod a pretty constant flowrate even if the purge pressure varies.