{"product_id":"potter-vsr-4-vsr-series-vane-type-waterflow-alarm-switch-with-retard-4-nominal-pipe-size","title":"Potter VSR-4 VSR Series Vane Type Waterflow Alarm Switch with Retard, 4 Nominal Pipe Size","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Potter Electric Model VSR-4 is a vane type waterflow switch designed for wet sprinkler systems. This unit is UL Listed for use on steel pipes, with support for schedules 5 through 40 in sizes ranging from two to six inches. Additionally, it has FM approval for use on schedules 10 through 40, with sizes two through eight inches. The VSR-4 can function as a sectional waterflow detector in large systems.\u003c\/p\u003e\u003cp\u003eIt features two single pole, double throw (SPDT) snap action switches and an adjustable pneumatic retard mechanism that recycles instantly. The switches activate when water flow reaches 10 GPM or more downstream. The required flow condition must persist long enough to exceed the selected retard period.\u003c\/p\u003e\u003cp\u003eThe VSR-4 is housed in a durable die-cast enclosure, secured with tamper-resistant screws that necessitate a special key for removal. For added security, a field-installable cover tamper switch is available to indicate unauthorized access.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUL, CUL and CSFM Listed\u003c\/li\u003e\n\u003cli\u003eFlow sensitivity range: 4-10 GPM\u003c\/li\u003e\n\u003cli\u003eIncludes two conduit knockouts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eDurable design suitable for various applications in fire protection systems.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: Potter Electric Signal, LLC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: China\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Sprinkler Flow Switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Model\u003c\/strong\u003e: VSR-4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Sensitivity Range\u003c\/strong\u003e: 4-10 GPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Size Compatibility\u003c\/strong\u003e: 2 to 6 inches, 2 to 8 inches UL\/ FM\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"POTTER ELECTRIC","offers":[{"title":"Default Title","offer_id":50199828660530,"sku":"VSR-4","price":202.03,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/236094981.jpg?v=1752109759","url":"https:\/\/voomisupply.com\/products\/potter-vsr-4-vsr-series-vane-type-waterflow-alarm-switch-with-retard-4-nominal-pipe-size","provider":"Voomi Supply","version":"1.0","type":"link"}