The pneumatic high-temperature ball valve features a metal hard-seal seat, suitable for media up to 500°C. It can be equipped with a valve positioner to receive control signals (4-20mADC or 1-5VDC) and operate via compressed air. When equipped with a travel limit switch, solenoid valve, pressure reducing valve, and a 0.4–0.7 MPa air supply, the valve can perform on/off operations and output two pairs of passive contact signals to indicate valve status.