The Solberg Variable Range Proportioner is a low foam solution proportioning device, designed to accurately proportion the foam concentrate into the water stream at both high and low system flow rates. The Solberg Variable Range Proportioner is designed as an integral component of the Solberg Bladder Tank proportioning system, to be used with Solberg foam concentrates in foam-water sprinkler systems. The Solberg Variable Range Proportioner complies with NFPA 30, the Flammable and Combustible Liquids Code, Paragraph 16.5.1.6.2, which states that foam/water sprinkler systems are to provide foam solution to operating sprinklers with 4 sprinklers flowing. The Solberg Variable Range Proportioner was designed to meet this Code requirement.
