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The N.G.D line-fluid actuated valve is a piston type,
hydrostatically unbalanced fail-to-close valve. The actuation of the valve
is done by the line-fluid pressure and the opening and closing is
controlled by a single 3/2 solenoid valve or double 2/2 solenoid valves.
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The N.G.D line-fluid actuated valve is used in general
as a line-isolating valve, which can be operated locally or remotely. When
utilising flow or pressure switches, the valve can also be used as a
safety shutdown, pressure control or flow control valve.
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