Features and performance of double-take fire-resisting breathing valve: Double-take fire-resisting breathing valve is a take-over respiration installed on the top of (indoor) fixed storage tank. It can automatically adjust the pressure difference inside and outside the oil tank and its performance Reliable, stable, in full compliance with the Ministry of Petroleum Industry SY7511-87 standards. With double take fire resistance breathing valve scope of application: With double resistance fire breathing valve for storage within the point below 28. C Group A oils and flash point below 100. C B oil, such as benzene benzene, kerosene, light diesel oil, thick oil and other oil products and chemical storage tanks of the same nature.