ZBA21 series spring slightly opened external thread safety valve

Type A21H is suitable for equipment and pipelines with operating temperatures ≤200°C such as air, ammonia, petroleum gas and other media. Type A21W is suitable for equipment or pipelines containing corrosive gases or liquids with temperatures ≤200°C. Type A21F is suitable for use on equipment and pipelines such as liquefied gas and petroleum gas with temperatures ≤ 80°C as an overpressure protection device.

For information on main parts materials and connection dimensions, you can contact us directly. If your working conditions are special, our valve professional technicians will accurately select the valve for you based on actual conditions.