... uses for small valves, pipe, downhole tools, and other products of high pressure gas tightness testing, performance testing and targeting safety valve, ... 6. experiment sample workpiece diameter: Trachea 3-100mm, water pipe 3-50mm, drill tubing 300-60mmFourth:equipment 1. gas supercharger ... : pressure gauges, valves, fittings, etc. Most popular Automotive testing equipment &air tightness test rig