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The VSR-SFG is equipped with a glue-in union , making it ideal for installation in confined spaces . It features two single-pole, double-throw snap action switches and an adjustable, instantly recycling pneumatic retard . The switches are triggered when water flow reaches 8-10 gallons per minute (30-38 LPM) , with the flow condition needing to persist long enough to overcome the selected retard period. Although this product is now obsolete , Elite Fire Trading Company continues to support customers who use the VSR-SFG Waterflow Alarm Switch in their fire sprinkler systems. As the authorized di
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