The under-liquid foam extinguishing system is safe,reliable and easy to put out a fire with a low cost, its defect is leakage in the check valve.

• 与液上喷射泡沫灭火系统相比,液下喷射泡沫灭火系统具有安全可靠、灭火速度快、节省投资等优点,但却存在单向阀易渗漏问题。