Viking® F20217N Model VRC Foam Ratio Controller, 3% XMAX, 4" 332822 205 Degree 20983FE Fire Sprinkler

205 Degree 20983FE Fire Sprinkler Head

Nominal Angle 60

58-170-1-165

53-101-7-212

Item: RASCO/Reliable® RA1325

Viking® F20217N Model VRC Foam Ratio Controller, 3% XMAX, 4" 332822 205 Degree 20983FE Fire SprinklerThe 4 inch ratio controller accurately proportions foam concentrate into a water stream over a wide range of water flow rates. Ratio controllers are an integral part of an approved foam system. In addition to the ratio controller, the main components of the approved foam system are specific foam concentrates, a foam storage tank, a concentrate control valve and foam discharge devices. The system must be designed so that the ratio controller can