I. Product Introduction

Operation Principle of Semi-Fixed (Portable) Foam Fire Extinguishing Equipment

The semi-fixed (portable) foam extinguishing device connects the pipe union at both ends of its ratio mixer to the fire hose during extinguishing and to the pressure water source. When water at a pressure of not less than 0.6 MPa flows at a high speed through the nozzle of the ratio mixer, due to the lateral movement and diffusion of jet particles, a vacuum (negative pressure) is formed inside the ratio mixer. Consequently, the foam liquid in the foam liquid storage tank is forced into the mixer through the suction tube under atmospheric pressure, mixing with the pressurized water to reach a certain ratio 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 extinguishing effect.

Performance Parameters of Semi-Fixed (Portable) Foam Ratio Mixing Device

Section 4: Structural Composition

Portable foam ratio mixing unit, consisting of a cart, foam tank, ratio mixer, spraying equipment (foam gun), hose, safety valve, control valve, and some auxiliary parts. Volumes available: 100L, 200L, 300L, 400L, 500L, 700L, 800L, 1000L. Flow rates: 4L/S, 8L/S.

Instructions for Use

During extinguishing, the pipe socket connections at both ends of the proportioning mixer are connected to the firehose and a pressure water source. As the pressure water flows through the proportioning mixer of the foam extinguishing unit, a negative pressure 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 pipe due to atmospheric pressure, where it mixes with the pressure water to achieve a certain proportion of foam mixture. When the foam mixture with pressure flows to the foam gun, the foam gun's performance draws in a certain amount of air, causing the foam mixture to foam. This achieves the effect of foam extinguishing.