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The VSR-FEX unit can also serve as a sectional waterflow detector in large fire protection systems, offering versatility for various applications. Equipped with two single pole, double throw snap-action switches and an adjustable, instantly recycling pneumatic retard , the VSR-FEX activates when 10 GPM (38 LPM) or more water flows downstream of the device. The flow condition must persist for a specified period, overcoming the selected retard time to trigger the alarm. This feature ensures precise and reliable alarm activation while minimizing the chances of false alarms in hazardous environmen
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