Pigging ball valve feature 1. Trunnion mounted ball; proven shut-off style design with energized upstream sealing seat, reduces the number of valves and controls required in traditional pig launching skids. 2. Pigging valve is superior to conventional devices for cleaning pipelines in its compact structure, reliable properties, handy operation, easy maintenance and lower cost for purchasing and running. 3. The inside of pipe without gaps, avoid existing foreign body; 4. Pigging valve's sealing ring are simple and all o-rings, maintain easy. 5. Pig valves could be pressure relief by relief valves, easy to open/shut of quick closure. 6. Standardized safety design such as antistatic design; cleanout design; zero leakage. Plywood case