The liquid separation time of the foam liquid refers to the time for the foam liquid sprayed by the foam fire hydrant to disappear. Foam fire hydrant is a kind of fire fighting equipment, mainly used for fire extinguishing and fire control. The sprayed foam liquid can quickly extinguish the fire, effectively suppress the fire, and reduce the loss caused by the fire.
The liquid analysis time refers to the time from the generation of a certain quality of foam to the precipitation of the mixed solution.
Commonly used to 25% liquid analysis time and 50% liquid analysis time, refers to the precipitation of 25% and 50% of the mass of the mixed solution time.
The fire extinguishing agent with long draining time has good stability, but poor fluidity and low fire extinguishing efficiency. The fire extinguishing agent with short draining time has good fluidity, but is not stable enough, and the foam is easy to disappear.
For the fluoroprotein fire extinguishing agent, the technical requirement for the draining time is ≥4.0min, and for the aqueous film-forming foam fire extinguishing agent is ≥2.5min.
The liquid analysis time of foam liquid is an important index of fire fighting equipment. It is directly related to the fire prevention effect of foam liquid and the work efficiency of fire rescue personnel. Therefore, when purchasing and using foam fire hydrants, it is necessary to strictly control the liquid analysis time.
Through scientific manufacture and use, we can effectively improve the draining time of foam fire hydrants. Some new foam fire hydrant materials and technologies are being continuously researched and developed to improve their fire-fighting effect and safety performance.
