Differential pressure indicating device

Details Differential pressure indicating device Differential pressure indicating device

G - Physics

01

L

116/67.5

G01L 13/00 (2006.01) B01D 35/143 (2006.01) G01L 7/16 (2006.01) H01H 36/00 (2006.01)

Patent

CA 1062093

ABSTRACT OF THE DISCLOSURE A differential pressure indicating device includes a piston responsive to the differential between inlet and outlet pressures. The piston is retained in a normal position by the force of spring means, and which spring means releases the piston at a predetermined excessive differential pressure condition, whereupon the piston actuates an indicating member for indicat- ing the condition. The device is reset by manually re-engaging the piston and the spring means subsequent to correcting the con- dition. False excessive differential pressure indications are also detectable since the indicating member is resetable in such cases. This avoids disassembling a surrounding housing to cor- rect an apparent malfunction of the monitored system. Only when the indicating member will not reset has a true malfunction occurred.

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