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The N.G.D timer-operated valve is a fail-to-open piston
type, hydrostatically unbalanced, and designed to automatically open or
close air or water lines. The actuation of the valve is by the line-fluid
pressure and the valve is controlled by a single 3/2 solenoid valve or
double 2/2 solenoid valves, receiving a signal from a timer switches
arrangement.
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The N.G.D timer-operated valve is used to
automatically/manually open or close underground air and water lines. The
timer-operated valve can prevent excessive wastage of air and water.
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