{"product_id":"viking-preaction-fire-system-double-interlock-galvanized-vxd-ptr","title":"Viking Preaction Fire System: Double Interlock, Galvanized VXD PTR","description":"\u003cdiv\u003e\n\u003cp\u003eThe Viking VXD PTR Double Interlock Preaction System is an advanced fire suppression assembly engineered for critical environments where preventing accidental water discharge is vital. This pre-trimmed riser (PTR) integrates directly into commercial and industrial fire sprinkler networks to protect sensitive facilities such as data centers, museums, archives, and cold storage. Utilizing a double interlock configuration, the system requires two independent conditions—the activation of an electric fire detection system and a drop in supervisory pressure—before water enters the piping. This dual-activation mechanism safeguards mission-critical assets against secondary water damage.\u003c\/p\u003e \u003cp\u003eDesigned to satisfy NFPA 13 compliance requirements, the assembly features a monitored release solenoid that continuously ensures the integrity of the release circuit. The integrated EA-1 Electronic Accelerator samples air pressure twice per second, enabling rapid response times during a confirmed fire event.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDouble Interlock Design:\u003c\/strong\u003e Requires both detection system activation and supervisory pressure drop to prevent accidental water release.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePre-Trimmed Riser (PTR):\u003c\/strong\u003e Arrives largely pre-assembled with a Model VXD Deluge Valve, riser check valve, and necessary trim to eliminate on-site pipe cutting.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEA-1 Electronic Accelerator:\u003c\/strong\u003e Microprocessor-equipped unit monitors air pressure twice per second for fast activation speeds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMonitored Release Solenoid:\u003c\/strong\u003e Maintains circuit integrity to meet NFPA 13 compliance standards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Piping:\u003c\/strong\u003e Galvanized steel construction delivers durability and a long service life in demanding commercial installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGroove\/Groove Connections:\u003c\/strong\u003e Streamlines field maintenance and diagnostic procedures.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003e\u003cb\u003eParameter\u003c\/b\u003e\u003c\/th\u003e \u003cth\u003e\u003cb\u003eSpecification\u003c\/b\u003e\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eManufacturer \/ Brand\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003eViking\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eModel \/ Series Number \/ SIN\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003eVXD PTR Double Interlock Preaction System\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eConnection \/ Thread Size \u0026amp; Type\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003eGroove \/ Groove Connections\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eMaterial \/ Body Construction\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003eGalvanized Steel Piping\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eApplicable NFPA Standards\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003eNFPA 13\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e\n\u003c\/table\u003e \u003cp\u003eContractors must verify local Authority Having Jurisdiction (AHJ) mandates and consult the manufacturer technical data sheets prior to beginning installation.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eDocumentation:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.vikinggroupinc.com\/sites\/default\/files\/2026-04\/F_041523_09.pdf\"\u003eDownload Manufacturer Technical Data \u0026amp; Cut Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Fire Protection Parts","offers":[{"title":"4 in. \/ Monitored Solenoid","offer_id":68031327862874,"sku":"28236","price":11670.99,"currency_code":"USD","in_stock":true},{"title":"4 in. \/ CoilKeeper","offer_id":68031327895642,"sku":"26680","price":11670.99,"currency_code":"USD","in_stock":true},{"title":"6 in. \/ Monitored Solenoid","offer_id":68031327928410,"sku":"28237","price":12015.99,"currency_code":"USD","in_stock":true},{"title":"6 in. \/ CoilKeeper","offer_id":68031327961178,"sku":"26682","price":12015.99,"currency_code":"USD","in_stock":true},{"title":"8 in. \/ Monitored Solenoid","offer_id":68031327993946,"sku":"28238","price":17923.99,"currency_code":"USD","in_stock":true},{"title":"8 in. \/ CoilKeeper","offer_id":68031328026714,"sku":"26684","price":17923.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/0637\/7818\/files\/DoubleInterlockPreactionSystemGalvanized.png?v=1794374568","url":"https:\/\/patriotsafesource.com\/products\/viking-preaction-fire-system-double-interlock-galvanized-vxd-ptr","provider":"Patriot SafeSource","version":"1.0","type":"link"}