Fixed inductor HLZ

high-performance

The HL-Z2 and HL-Z4 inductors are developed for general fire brigade applications when long hose lengths or heights are required, generating high pressure losses. On standard inductors, high pressure losses can stop effective foam aspiration. HL-Z foam inductors can be used in combination with low (S) or medium-expansion foam branchpipes (M) with the same flow performance. Features High performance in-line inductor Fixed induction at 0% to 6% Available in 200 Lpm and 400 Lpm flow rates Effective with 100 m hose to 36 m height Works with back-pressures up to 5 bar Compatible with all foams, including AFFF-ARC Operation Variable in-line inductors are used to mix foam concentrate with water when the foam concentrate is supplied from a tank or a can at atmospheric pressure. The HLZ in-line inductor has a better tolerance to back pressure and better foam concentrate suction than a standard in-line inductor. The HL-Z2 and HL-Z4 inductors connect to the water line. They can be placed at a distance from the foam branchpipe as they can accommodate up to 5 bar pressure loss in the hose. Construction The HLZ in-line inductor is constructed for a predetermined water flow at which it creates a drop of approximately 30% in the water pressure. Foam is drawn through a 25 mm pick-up tube from a container at atmospheric pressure. The preset flow of foam concentrate is continuously added to the water stream. Friction loss through the hose and static pressure loss of up to 5 bar does not influence the induction rate.