Hydrometers Operation and Maintenance Manual - Baseline Systems
Hydrometers Operation and Maintenance Manual - Baseline Systems
Hydrometers Operation and Maintenance Manual - Baseline Systems
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Typical Applications<br />
PRESSURE SUSTAINING<br />
The pressure sustaining operation prevents the input pressure from falling below a predetermined<br />
value. This application requires a Netafim Pressure Regulating Pilot Valve, or comparable valve.<br />
Rotate the adjusting screw atop the pilot valve counterclockwise to increase the desired input<br />
pressure <strong>and</strong> clockwise to reduce the desired input pressure.<br />
Connection Information<br />
The sensor connection runs from the input connector on the hydrometer to the controlled input<br />
connector (1) on the pilot valve. The sensor connection also branches off to the “Close” connector<br />
on the 3-Way Selector <strong>and</strong> to the vent connector (4) on the pilot valve.<br />
The comm<strong>and</strong> connection runs from solenoid to the “Auto” connector on the 3-Way Selector<br />
(via the shuttle valve) <strong>and</strong> continues on to the pressure controlled input connector (2) on the pilot<br />
valve.<br />
The supply connector (3) on the pilot valve serves as a vent. The output connector on the<br />
hydrometer is not used.<br />
18 • <strong>Hydrometers</strong> <strong>Operation</strong> <strong>and</strong> <strong>Maintenance</strong> <strong>Manual</strong>
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