... while air is being exhausted from port A.2, when ball valve closed, Air to port B forces the pistons outwards, causing ... air is being exhausted from port B. When ball valve opened, Loss of air pressure on port A, the stored energy in ... PTEF,PEEK,PPL2, BALL VALVE STRUCTUREFloating ball and trunnion mounted ball with 2-piece or 3-piece body3, CONNECTION ENDDouble flanged end, screwed end, wafer end, ...