Oil cylinder fluid port automatic welding machine is suitable for switch pesdestal and ball cylinder welding of the ball valve. The machine is drived by motors, controlled by the PLC, assisted controlled by electric relay, so it can realize automatic welding. Welding current and welding speed can be set on the operation panel. It has high automation level. The machine is composed of welding torch driving part, pneumatic system, electric control system and gas shield welding power source.

