This valve is designed to supply water at constant pressure to a wet automatic sprinkler system. It is typically used where zones with automatic sprinkles shall operate at a lower pressure than provided by the fire pump. The C-300 sprinkler valve has a built in non-return facility which prevents backflow if the valve inlet pressure suddenly drops. When the C-300 valve opens as caused by activated sprinkler heads, an alarm signal by water pressure can activate an alarm gong or pressure switch.

This valve is used where a controlled constant pressure is required for a downstream wet system - e.g. water supply to fire hydrants. The valve provides an alarm signal via TP5 port when activated. The valve has no actuator. During set-up (commissioning) the downstream pressure is pumped slightly higher than the pilot set-pressure setting, which will lock the deluge valve closed. In case of a downstream pressure drop the C-300 Pressure Control valve will open and start regulating.

This valve is used where excessive uncontrolled pressure surges from the kick-in of fire pumps shall be avoided. The C-300 Pump Control valve is installed near the fire pump outlet, and is open in the stand-by position. When the fire pump starts, the full flow capacity of the C-300 Pump Control valve is discharged to drain. Immediately at pump start the C-300 valve pilot will monitor the pumped pressure and starts to close untill the pump pressure equals the pilot set-pressure of the C-300 valve, thus providing a controlled fire pump pressure increase to the pipe system - and preventing the damaging effects of surge and water hammer. For optimum pressure surge control the C300 valve should be selected with a flow capacity 1,5 x pump capacity.

This valve is used where a constant downstream pressure is required, irrespective of the fire pump pressure. The deluge valve is fitted with a pressure control pilot that constantly monitors the downstream pressure and modulates the C-300 valve elastomeric orifice to open and close and maintain the pre-set downstream pressure.