An electrically controlled flow regulator valve assembly having a diaphragm operated pressure regulator valve with a solenoid operated valve for by-passing the diaphragm to control flow to the regulator valving chamber. In one embodiment the regulator valving chamber communicates through a small restricting orifice with a closed dampening chamber. In another embodiment a second closed dampening chamber is formed to communicate through a second small restrictive orifice with a chamber on the inlet pressure side of the diaphragm.