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Home // Solutions // Precision Removal of Frozen Poppet Valve Stem

Precision Removal of Frozen Poppet Valve Stem

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steam turbine valve
Steam Turbine Valve with a frozen poppet valve stem. A new bushing was not available. Stem had to be removed without damaging the bushing. The bushing is 13 inches deep.
valve-stem-before-removal
Valve stem connection point. Stem O.D. 1.215 inch.

valve-stem-in-bushing
Stem connection point removed with grinder after Metal Disintegration Machine (MDM) was aligned. Using a 1 inch O. D. semi-coreless electrode the MDM was started and stopped to check alignment.
removed-valve-stem
Stem after removal. Over 10 inches of the stem was removed with the MDM and was removed without damaging the bushing or the valve housing.