Description

The Viking 3” Model G-3000 Dry Valve Riser Assembly is equipped with 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.

The differential design of the differential valve allows an air supply of moderate pressure to control a higher water supply pressure. When the air pressure in the dry pipe system is reduced sufficiently upon the differential valve due to a sprinkler head operation to destroy the pressure differential, the differential valve will open and relieve the priming pressure from the internal diaphragm assembly. The internal diaphragm assembly will compress, which will allow water to pass through the body of the valve and center of the internal check valve, entering the sprinkler system piping.

The Viking Model G-3000 Valve is designed to be used with a water flow pressure switch and/or water motor gong. For systems that require an accelerator to increase the speed of water delivery, the Viking Model E-1 Accelerator shall be used.