I. Product Introduction
Operation Principle of Semi-Fixed (Portable) Foam Fire Extinguishing Device
The semi-fixed (portable) foam fire extinguishing device connects its proportioning mixer's pipe fittings at both ends to the fire hose and the pressure water source during extinguishing. When water at a pressure of not less than 0.6 MPa flows at a high speed through the nozzle of the proportioning mixer, due to the lateral movement and diffusion of the jet particles, a vacuum (negative pressure) is formed inside the mixer. As a result, the foam liquid in the foam liquid storage tank is forced into the mixer through the suction tube under the action of atmospheric pressure, where it mixes with the pressure water to achieve a certain proportion of mixed liquid. When the mixed liquid, at a certain pressure, reaches the foam gun, the foam gun's performance draws in a certain amount of air, causing the foam mixture to foam. This achieves the foam fire extinguishing effect.
Semi-permanent (Portable) Foam Ratio Mixing Device Performance Parameters
IV. Structural Composition
Portable foam proportioning mixer, consisting of a cart, foam tank, proportioning pump, spraying equipment (foam gun), water hoses, safety valve, control valves, and some auxiliary components. Volumes: 100, 200, 300, 400, 500, 700, 800, 1000 liters. Flow rates: 4L/S, 8L/S.
Usage Instructions
During fire extinguishing, the pipe flanges at both ends of the proportioning mixer are connected to the fire hose, and then connected to the pressure water source. As the pressure water flows through the proportioning mixer of the foam fire extinguishing unit, a vacuum is formed inside the proportioning mixer. Consequently, the foam extinguishing agent in the foam liquid storage tank is forced into the proportioning mixer through the suction tube by atmospheric pressure, mixing with the pressure water to form a foam mixture of a certain proportion. When the foam mixture under pressure reaches the foam gun, due to the foam gun's ability to draw in a certain amount of air, it foams the mixture. This achieves the foam fire extinguishing effect.
