I. Product Introduction

The working principle of the 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 to a pressure water source. When water at a pressure of not less than 0.6MPa flows at a high velocity through the nozzle of the proportioning mixer, the vacuum (negative pressure) is formed inside the mixer due to the lateral movement and diffusion of jet particles. As a result, the foam liquid in the foam liquid storage tank is forced into the mixer by atmospheric pressure through the suction pipe, mixing with the pressure water to achieve 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 fire extinguishing effect.

Performance parameters of semi-fixed (portable) foam ratio mixing equipment

Section 4: Structural Composition

Portable semi-fixed foam ratio mixing unit, consisting of a cart, foam tank, ratio mixer, spraying equipment (foam gun), water 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.

Usage Instructions

During fire extinguishing, the pipe socket interfaces at both ends of the proportioning mixer are connected to the fire hose, and the pressure water source is connected. As the pressure water flows through the proportioning mixer of the foam fire extinguishing device, 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 achieve a certain proportion of foam mixture. When the foam mixture, under a certain 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 fire extinguishing.