FIELD: machine building.
SUBSTANCE: group of inventions relates to control valves. Thermally compensated valve trim apparatus are disclosed. Said valve trim apparatus according to one version includes a valve plug having a recess, an insert fixed in recess and having an opening. Insert is made of a material having a greater strength than a second material of valve plug. Valve trim apparatus according to one version also includes a valve stem, having a threaded end disposed in opening of insert to form a valve stem connection, and a spacer operatively coupled to valve plug and valve stem to affect a load exerted on valve stem connection in response to a change in temperature.
EFFECT: group of inventions is aimed at improving reliability of control valve unit.
17 cl
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RU2525987C2 |
