thermal valve

thermal valve

[′thər·məl ′valv]
(mechanical engineering)
A valve controlled by an element made of material that exhibits a significant change in properties in response to a change in temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

thermal valve

A valve whose action is controlled by a thermally responsive element.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The reduction of cooling power required by the electromechanical coolant pump, radiator fan(s), and thermal valve demands real time control strategies.
Supplies hot-runner systems with a "thermal valve gate"--i.e., using a separate, fast-acting tip heater to alternately freeze and melt the material at the tip.
This device acts as a one-way thermal valve, if the temperature is hotter outside than in the refrigerator heat is not transferred into the refrigerator.
In automatic transmissions, temperature changes cause both the viscosity and density of the fluid to vary, making possible two thermal valve applications.
There will also be new examples of what one supplier calls "thermal valve gates"--nozzles that have independent tip heaters that can quickly open up or freeze off the tip as needed.
Thermal Valve Gate hot-runner probes, manifolds, and controls.
A compact "Universal Controller" that can run virtually any hot-runner system of any number of zones is new from Thermal Valve Gating.
Internally heated hot-runner probes employ patented Thermal Valve Gating process, where by a separate second heater at the tip of probes cycles on and off, providing absolute control at the gate.