Micro-accurate 4-piston,positive displacement type meter with rotary valve, exterior adjustment and double oil lip seal Material:1,Body: Aluminum ( ... 0.04%8.Working pressure:0.12Mpa-0.3MpaFeatures:1.Micro-accurate 4-piston,positive displacement type meter with rotary valve ... , exterior adjustment and double oil lip seal for long life.2.External structure achieved by ...