Temperature-actuated flow control device

Details Temperature-actuated flow control device Temperature-actuated flow control device

1984-03-23

1985-03-05

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

Automatic control

7386434, G01N 124

Patent

active

045023417

ABSTRACT:
A temperature-actuated flow control device has a fluid inlet connected to an exhaust line with a control chamber located therebetween. The control chamber has a free-floating bi-metallic circular element which is flexed in response to temperature changes between a first position stopping flow between the inlet and the exhaust line and a second position opening the flow therebetween. This flow control device, when adapted to a gas sampling system, allows the bi-metallic element remain in a first position at normal operating temperatures to permit the continuous sampling of the sample gas. Whenever the temperature falls below the dew point of the sample gas, the bi-metallic element returns to its second position to stop the sampling of sample gas by the system to prevent condensation in the system.

REFERENCES:
patent: 3709204 (1973-01-01), Noponen
patent: 4441356 (1984-04-01), Bohl

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