Marketing InformationThe Apollo Valves 14-400 Series high volume air relief valves are designed for low pressure/high volume air and gas service. Rugged bronze construction features elastomer soft seating and TFE coated discs for dependable operation.Factory Set Pressures 4 to 22 psig at 400 degree F max.Non-ASME Code Air and Gas ServiceVibration Resistant Soft Seat is StandardStainless Steel SpringOne Piece Corrosion Resistant Bronze Body DesignHigh Flow ''''Top-Guided'''' Design