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GW - Model C300 -Fluid Control Valve Pressure Reducing
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 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.
Horizontally or vertically. Fits between ANSI /ASME B16.5 Class 150 or 300 lbs. flanges.
The GW C-300 deluge valve is developed and designed for maximum reliability when installed and operated in the harshest on-shore and off-shore environments. To prevent any malfunctioning due to components seizing, sticking or corroding, the number of moving mechanical parts has been reduced to a minimum, and the few moving parts present are ALL 100% isolated (i.e. no water contact) from the flow media. The only moving components in contact with the flow media are the elastomeric parts. A strainer is fitted in the inlet of the valve center block to prevent any debris from entering the hydraulic pilot regulating system.