Water-sensitive probe valve for use with a gas leak detector

Details Water-sensitive probe valve for use with a gas leak detector Water-sensitive probe valve for use with a gas leak detector

1982-09-22

1984-03-20

Weakley, Harold W.

Fluid handling

Destructible or deformable element controlled

137559, F16K 1304

Patent

active

044374828

ABSTRACT:
A water sensitive cutoff valve shuts off upon detecting water to protect a gas leak detector. A transparent case threads into a base and houses a normally open valve mechanism. The valve includes a tapered post with an exit port and a shuttle that is capable of movement along the post to seal or uncover the port. A water-soluble band stretched between a finger mounted on the post and a second finger mounted on the shuttle holds the valve open against the bias of a spring that acts between the shuttle and the post. The presence of water dissolves the band and frees the shuttle to close under the bias of the spring and prevent water from entering and damaging the gas leak indicator. The base has an inlet port for a gas probe, a passage into the case, and an exit port to the gas leak detector. The passage into the case includes a tube extending into the case with an exit in close proximity to the band.

REFERENCES:
patent: 3920031 (1975-11-01), Maxfield
patent: 4294276 (1981-10-01), Harrison

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