As (2in DN50)Air Vacuum Relief Valve Exhaust Vent Valve For Agricultural Garde
Style: 1.5in DN40, 2in DN50(Optional). 2in DN50 Size: Approx.25x19cm / 9.8x7.5in. It is installed at a relatively high point of the piping system. When the system is started, the air in the piping system is exhausted.