... ceramic rotary valve for textile machine 1.wear-resistant 2.anti-high temperature 3.mechanical seals good 4.anti-corro Al2O3 ceramic rotary valve for ... pump, ceramic rod, ceramic shaft, ceramic piston, ceramic water valve sheet, ceramic pipe sleeve, ceramic loom plunger, ceramic seal ring ... 005Parallelism0.01Planeness0.005Roughness 0.05Fit clearance0.005 Al2O3 ceramic rotary valve for textile machine