PESO Approved, Internal Excess Flow Check Valves (EFCVs) 2 ” & 1″ By suyash | September 12, 2011 - 10:36 am |September 20, 2016 Featured, Products PESO Approved, Internal Excess Flow Check Valves for LPG Road Tankers, 2 ” & 1″ Cavagna, Italy make, PESO Approved, Internal Excess Flow Check Valves for LPG Tankers Available Sizes 2 ” & 1″ Bookmark the permalink.