G-4000 Dry Pipe Valve from Viking Group, Inc.

The Viking 4 inch Model G-4000 Dry Pipe Valve is a small profile, light weight, pilot operated valve that is used to separate the water supply from the dry sprinkler piping which is pressurized with air. The pilot operated valve combines an internal diaphragm assembly that is pressurized closed with priming water, an internal check valve to isolate the sprinkler system piping and the Model A-1 Differential Valve located on the valve trim that allows the valve to operate upon loss of air pressure.