{"product_id":"viking-16971-model-d-4-pressure-operated-relief-valve-corrosion-resistant","title":"Viking® 16971 Model D-4 Pressure Operated Relief Valve, Corrosion Resistant","description":"\u003cp\u003e\u003cspan\u003eThe Viking Model D Pressure Operated Relief Valve (PORV) is used in Viking Deluge, Preaction, Firecycle\u003csup\u003e®\u003c\/sup\u003e Multi-Cycle and Surefire\u003csup\u003e®\u003c\/sup\u003e Systems. Once tripped, it maintains a positive vent to prevent the deluge valve from automatically resetting prematurely. The device is automatically reset when the pressure is removed from the control diaphragm. The device is designed to trip when the trip port is pressurized with water from the intermediate chamber of the control valve, or when the water in the inlet is drained from the prime chamber of the control valve. The Model D-4 PORV is similar to the D-3, except some components are specially plated for additional corrosion resistance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eItem:  Viking® 16971 Model D-4 Pressure Operated Relief Valve, Corrosion Resistant\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Viking Model D-3 and D-4 Pressure Operated Relief Valve Spec Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2233\/5109\/files\/Viking_Pressure_Operated_Relief_Valve_Model_D-3_and_D-4_Spec_Sheet.pdf?v=1757085165\" target=\"_blank\"\u003e\u003cstrong\u003eSPEC SHEET\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"13\" width=\"16\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2233\/5109\/files\/6pt.png?v=1729206837\" alt=\"\" style=\"font-size: 0.875rem;\"\u003e\u003cstrong style=\"font-size: 0.875rem;\"\u003eWARNING:\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm.   For more information go to \u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.p65warnings.ca.gov\/\" style=\"font-size: 0.875rem;\" target=\"_blank\"\u003ewww.P65Warnings.ca.gov.\u003c\/a\u003e\u003c\/p\u003e","brand":"Viking","offers":[{"title":"Default Title","offer_id":46609495294205,"sku":"W2242035","price":1781.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2233\/5109\/files\/Viking16971.png?v=1757086428","url":"https:\/\/wesupplyit.com\/products\/viking-16971-model-d-4-pressure-operated-relief-valve-corrosion-resistant","provider":"WeSupplyIt.com","version":"1.0","type":"link"}