The Overpressure Blast Valve Type A 1240 is designed to release air from the shelter while maintaining a constant overpressure and also to protect against explosive and implosive blast waves. The valve is normally closed, is maintenance-free, and withstands heat and corrosion. The springs are manufactured from special stainless steel and all steel parts are galvanized to 100 μm and finished with a powder coating.
The Overpressure Blast Valve Type A 1240 is a valve used to stop explosive blast waves from entering a bomb shelter as well as to regulate the air pressure inside the shelter. The valve is tested and certified for compliance to the applicable Israeli, Singaporean, and Swiss standards
