Breathing valve working medium, operating pressure and ambient temperature
The breathing valve is a critical ventilation device installed on the top of storage tanks, designed to maintain safe internal pressure levels and prevent damage caused by overpressure or vacuum conditions. It also helps minimize the evaporation loss of stored liquids. According to China's "Code for Fire Protection Design of Petro-Chemical Industry" (GB50160-92), fixed roof tanks storing Class A and B liquids must be equipped with both flame arrestors and breathing valves to ensure safety and compliance.
Ono Co., Ltd. has developed a comprehensive range of SB series breathing valves, featuring a compact design, lightweight construction, high ventilation capacity, and minimal leakage. These valves are available in various configurations, including single-valve, single-suction valve, and combined structures that can be integrated with flame arresters. They are suitable for a wide range of applications and can be customized as needed.
The working media supported by these valves include gasoline, kerosene, diesel, aromatic hydrocarbons, sulfur, air, and other petrochemical substances. The fire protection category should be selected according to "HGJ21-89."
Operating pressure specifications are as follows:
- Exhaust pressure: B model: +980 Pa, C model: +1750 Pa, D model: +4 kPa, E model: +18 kPa
- Suction pressure: B model: -295 Pa, C model: -295 Pa, D model: -0.5 kPa
The valves are designed to operate within an ambient temperature range of -30°C to +60°C, making them suitable for use in a variety of environmental conditions. Whether in industrial storage facilities or chemical processing plants, Ono’s SB series breathing valves provide reliable performance, ensuring both operational efficiency and safety.
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