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1.Outer Hull:#45 steel forging, HB180-200 Hardness
2.Inner Sleeve:high chromium cast iron centrifugal casting, HRC≥60
3.HP lip design to prevent inner sleeve slippage
4.Surface finish of Inner Sleeve Ra0.05, much higher than API Standard Ra0.2 5.Service Life: not less than 800 hours under normal working condition, even more than 1000 hours.
6.High Chromium Content: 26%-28%
7.Max.Operating Pressure: 7500 PSI
