A pilot operated flow regulating valve has pressure governing chamber receiving a moveable pressure receiving member for common movements together with a main valve member of the pilot operated flow r
5967176Automatic flow control valve with variable set-points1999-10-19Blann et al. 5816286Pressure unloading pilot operated regulator having pressure limiting check valve1998-10-06Scott et al. 5555910Pressure relief valves adapted for low pressure operation1996-09-17Powell et al. ...