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Breathing valve working medium, operating pressure and ambient temperature
The breathing valve is a ventilation device fixed on the top of the storage tank to ensure the normal state of the pressure in the tank and prevent the tank from being damaged due to the overpressure or the vacuum caused by the overpressure or the vacuum, and also to reduce the liquid volatilization loss in the tank. According to China's "Code for Fire Protection Design of Petro-Chemical Industry" (GB50160-92), "A and B liquid fixed roof tanks shall be equipped with flame arrestors and breathing valves." Ono Co., Ltd. has developed a series of SB series of new products with complete specifications , Compact structure, light weight, large ventilation, small leaks and so on. Products are single-valve, single-suction valve, breathing valve, a variety of structural forms can be combined with the flame arrester structure, but also the preparation of the required take over. Working medium: gasoline, kerosene, diesel, aromatics, sulfur, air, etc., or other petrochemical materials, fire retardant category selection according to "HGJ21-89". Operating pressure and ambient temperature: Exhaust pressure: B, +980 Pa C, +1750 Pa D, +4 KPa E, +18 KPa Suction pressure: B, -295 Pa C, -295 Pa D, -0.5 KPa Specified) Ambient temperature: -30 ° C -60 ° C