pneumatic butterfly valves Size Range:DN50~DN600 Structure:butterfly valve CE,API,ISO,ABS pneumatic butterfly valvesSize Range: DN50~DN600Class Range: 150LB ... : We can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel, alloy steel ... standards of GB, ASME, ANSI, API, BS, DIN, JIS etc. We can offer special standard valves to our clients on your request ...