Temperature compensated differential pressure indicating device

Details Temperature compensated differential pressure indicating device Temperature compensated differential pressure indicating device

G - Physics

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G01L 7/16 (2006.01) B01D 35/143 (2006.01) G01L 9/14 (2006.01) G01L 13/02 (2006.01) G01L 19/12 (2006.01) H01H 35/38 (2006.01)

Patent

CA 1176868

ABSTRACT A differential pressure indicating device which is temperature compensated and includes a piston responsive to a pressure differential between inlet and outlet pressures. The piston is retained in a normal or first position by the force of a spring holding mechanism. The spring holding mechanism releases the piston at a predetermined excessive differ- ential pressure condition to a second position. As this occurs, the piston actuates an indicating member to an indicating condition. A temperature sensitive bimetallic strip is provided to permit the piston to move to the second condition without activating the indicator member when the temperature of the fluid is below a predetermined temperature.

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