Recondition of exhaust valves and seatsReconditioning of exhaust valves and seats includes cleaning, fault detection, premachining, build-up welding, final machining, dimension, crack detection.
The old stellite is removed out. The seating surface is built-up welded with stainless steel sublayer wires. Stelliting is performed by plasma powder welding.
On the valve stem and stem top the metal is machined out, rebuilt and grinded.
Nimonic type valves we build-up weld by WIG-cold-wire method.
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