Foam fire box 
 Form 
 Foam fire box (Mr. Rowe: 13928818119) is a simple and efficient fixed foam fire extinguishing equipment is widely used. 
 Foam fire box proportioner, foam gun, foam liquid tank, hose reel (fire hose), the drip valve (low pressure leak valve), level gauge, inlet valve, water (sewage) valves, etc. composition. 

 Working principle 
 Foam fire box when there are not less than 0.6MPa pressure in fire suppression water at high speed flow through the pipelines and pipeline proportioner for foam fire box, due to the lateral movement of the jet particle diffusion proportioner indoor the formation of a vacuum (negative pressure), so the foam liquid in the foam liquid tank under atmospheric pressure through the pipette into the mixer, mixing water with the pressure, and ultimately achieve a certain percentage of the mixture. When the mixture flow to the spray gun with a certain pressure, the foam mixture foam, so as to achieve the effect of foam fire extinguishing.