Choked Flow in 1/4" Pressure Regulator at 3.5bar

[Suresh Gadekar]

Is it possible to have choked flow in a 1/4" diameter pressure regulator with pressure difference of 3.5bar?

 

[cjl]

Sure. It depends on the pressure ratio across the orifice, and if the output is atmospheric, an input of 3.5 bar is more than enough to create choked flow.