Thermally compensated valve trim apparatus
AssigneeFisher Controls International LLC
InventorsJonathan Wesley Richardson, Justin Paul Goodwin, Jesse Creighton Doyle
Life of this patent
Estimating the term…
Abstract
Thermally compensated valve trim apparatus are disclosed. An example valve trim apparatus includes a valve plug having a recess, an insert fixed in the recess and having an opening therein. The insert is made of a material having a greater strength than a second material of the valve plug. The example valve trim apparatus also includes a valve stem having a threaded end disposed in the opening of the insert to form a valve stem connection, and a spacer operatively coupled to the valve plug and vale stem to affect a load exerted on the valve stem connection in response to a change in temperature.
Claims21
A valve trim apparatus, comprising:
- a valve plug having a recess;
- an insert fixed in the recess and having an opening therein, the insert made of a first material having a greater strength than a second material of the valve plug;
- a valve stem having a threaded end disposed in the opening of the insert to form a valve stem connection;
- and
- a spacer operatively coupled to the valve plug and the valve stem to affect a load exerted on the valve stem connection in response to a change in temperature.
A valve trim apparatus, comprising:
- a valve plug having an aperture;
- a valve stem having a threaded end disposed in the aperture of the valve plug to form a valve stem connection;
- and
- a spring washer operatively coupled to the valve plug and the valve stem to affect a load exerted on the valve stem connection in response to a change in temperature.
A valve trim apparatus, comprising:
- means for securing a valve stem to a valve plug to form a valve stem connection;
- and
- means for controlling a load exerted on the valve stem connection in response to a change in temperature.
Dependencies are inferred from the claim text.