The CSA Mod. Ventolo-ST is a valve specifically-designed for use in hot water systems. With its body in ductile cast iron (nickel plated), and internals and float in stainless steel/viton, the valve automatically releases air pockets accumulated on critical points. Thanks to the lever mechanism, the float force is multiplied to reach low sealing pressure values. The valve guarantees high accuracy, even in case of low flow rate conditions, drastically reducing maintenance operations.