MBSA-2 mini safety device design has two degrees of protection: . 1. Non-return valve - prevents gas from flowing in the direction opposite to the normal direction of flow. 2. Flame dam - causes the flame to cool down and be extinguished. The MBSA type mini-fuse is made in the form of a cylindrical body with two spigots - inlet and outlet. There is a mesh filter in the inlet port, and a check valve and flame dam in the body. Applications. Dry buttress mini-fuses are mounted on the gas inlets of torches designed for cutting and welding. They are used to protect gas installations feeding the burner from the effects of flame backflow and prevent gas flow in the opposite direction to the normal direction of flow.MBSA-2 mini safety device design has two degrees of protection: . 1. Non-return valve - prevents gas from flowing in the direction opposite to the normal direction of flow. 2. Flame dam - causes the flame to cool down and be extinguished. The MBSA type mini-fuse is made in the form of a cylindrical body with two spigots - inlet and outlet. There is a mesh filter in the inlet port, and a check valve and flame dam in the body. Applications. Dry buttress mini-fuses are mounted on the gas inlets of torches designed for cutting and welding. They are used to protect gas installations feeding the burner from the effects of flame backflow and prevent gas flow in the opposite direction to the normal direction of flow.Technical data: Fuse type: MBSA-2 Gas type: acetylene. Working pressure range: 0.1 -1.5 bar Type of fuse. Fittings thread: G3/8LH . Hose ends : 8 mm.