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Repair valves by grinding. Refacing valve seats. Refacing valve cages. Counterboring seat ring bores. Refacing circular landing surfaces. Honing cylinder liners. ... Our valve grinding machines VKM are used for grinding valves with stem diameters from 6 to 40mm. VKM1M. Valve Grinding Machine. for valves with stem diameter up to 20 mm.
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