Features: 1: Can be used for bidirectional flow 2: only need to turn 1/4 turn from fully open to fully closed 3: rotate to stop in fully open and fully closed position 4: show the degree of opening and closing at the top of the stem 5: chrome ball can minimize the internal leakage rate 6: Ball valve seats with low friction and high sealing ptfe gaskets 7: Full flow channel design for minimal pressure drop 8: Figure no. C series with charging valve 9: Inside nut with safe pressure relief groove 10: Compact body for easy installation 11: Valve body with support mounting hole, easy to install