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GW - Model C300 -Fluid Control Valve Pressure Reducing
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.
This valve is typically fitted into a fire water main to provide a regulated downstream pressure to a pre-set value, irrespective of the flow rate and up- stream pressure conditions. Installation can be either horizontally or vertically.
The GW C-300 deluge valve is “self-powered” – and utilizes the system upstream (inlet) pressure to regulate.
The valve principle is “elastomeric sleeve type” where the annular valve orifice is adjustable by expansion/contraction of the rubber flow sleeve.
Pressure regulation is accomplished by the pilot control valve which will feed or drain water to/from the sleeve cavity, to open or close the flow orifice as required, when sensing the downstream pressure and comparing it to the pre-set pilot pressure. The regulating speed is adjustable via restrictors controlling the in and out flow to the sleeve cavity, thus preventing water hammer and damage to downstream pipework and components.