This product is now obsolete. It has no direct Viking™ replacement.
Overview
The Viking™ VK790 C-1 Window Sprinkler (Part Number 01320BF) is a special-application open sprinkler designed for use in deluge fire protection systems. It provides dependable protection for windows, walls, and roofs that could be exposed to fire from nearby structures or equipment. When activated, the sprinkler releases a wide, fan-shaped sheet of water that acts as a curtain to block heat and flames from reaching the building interior.
Built from high-quality brass with a durable chrome finish, the VK790 combines strength, corrosion resistance, and a clean appearance suited for both industrial and architectural settings. Its 1/4-inch orifice and 1.5K rating provide a controlled flow of water for smooth and even spray coverage. With a 1/2-inch NPT connection, it installs easily in both new and existing deluge systems and performs reliably under a wide range of conditions.
Product Overview
The VK790 C-1 creates a 180-degree fan-shaped discharge pattern designed to project an even sheet of water across a window, wall, or other vertical opening. This water curtain helps cool the surface and stops flames and radiant heat from spreading through the glass or structure. It is especially useful for buildings with large exposed windows, industrial enclosures, or exterior walls that face fire risks from nearby operations or property lines.
The sprinkler performs effectively at a minimum pressure of 7 psi and can handle up to 175 psi of rated water pressure. Its precision-machined deflector ensures a steady, even spray pattern every time the system activates. The strong brass body with a polished chrome finish provides both durability and a professional look, making it suitable for use in areas where both function and appearance are important.
In operation, multiple VK790 sprinklers are typically spaced along a window or wall so that their spray fans overlap, forming a continuous barrier of water. This helps to cool surfaces evenly and limit fire damage. When used in a properly designed deluge system, the VK790 offers dependable performance and consistent protection for exposed areas.
Listings and Approvals
The Viking™ VK790 C-1 Window Sprinkler is both UL Listed and FM Approved for use in fixed fire protection systems. These certifications confirm that the sprinkler meets recognized safety and performance standards for open-type sprinklers in deluge applications. It is approved for use under design conditions outlined in the manufacturer’s data sheets and in accordance with local fire protection codes.
Each sprinkler undergoes detailed testing to confirm that it performs reliably under the rated pressures and temperatures. These approvals give engineers, installers, and building owners confidence that the VK790 meets the strict quality requirements for dependable fire protection in exposed environments.
Installation and Maintenance
Proper installation is important for the VK790 to perform as intended. The sprinkler must be positioned exactly as shown in the system drawings so that the water spray covers the full width of the protected window or wall. Use the manufacturer’s recommended wrench and tighten the sprinkler only to the proper torque value to avoid leaks or damage. Keep the sprinkler clean and free of debris during construction, and remove all protective covers before testing.
Once installed, the sprinkler should be part of regular inspection and maintenance programs as outlined in NFPA 25 or other applicable standards. Inspect the deflector and orifice regularly to make sure they are clean, properly aligned, and free from corrosion or mechanical damage. Replace any sprinkler that is blocked, corroded, or bent to ensure full system performance.
With its strong brass construction, corrosion-resistant chrome finish, and reliable 180-degree spray pattern, the Viking™ VK790 C-1 Window Sprinkler provides long-lasting protection for exposed areas where fire could spread through windows or openings. It combines durability, proven performance, and easy installation to deliver dependable fire safety for both commercial and industrial applications.
