The 106-PR-SC and 206-PR-SC pressure reducing valves with solenoid shut-off are based on the 106-PG or 206-PG main valve.
The pilot valve senses the downstream pressure through a connection at the valve outlet. Under flowing conditions, the pilot reacts to small changes in pressure to control the valve position by modulating the pressure above the diaphragm. The downstream pressure is maintained relatively steady at the pilot set-point.
The solenoid shut-off / override interrupts the PR function to close off the main valve. The valve is available as either normally open where the solenoid is energized to close the main valve or as normally closed where the solenoid is de-energized to close the main valve.
For more information on the 106 / 206-PR-SC pressure reducing valve: