Steam pressure converter - with perforated moving and stationary closure elements

摘要

The new steam pressure convertor gives a better control characteristic because the change of the passage cross-section in the first throttling stage is spread over a long travel of the closure element and because the second throttling stage can also be adjusted. the movable closure element has ahead of its conical seat a hollow extension with rows of holes of varying dia. in the upper part. The sleeve with the conical seat which is fixed in the convertor casing has holes of varying dia. inits wall at the lower part. Another sleeve with holes, which surrounds the first with an annular gap, is embedded in sound insulating material such as metal or mineral chips.