Frost proof valve

Details Frost proof valve Frost proof valve

2005-05-03

2005-05-03

Walton, George L. (Department: 3753)

Fluid handling

Freeze condition responsive safety systems

C119S078000, C119S080000, C137S414000, C137S486000, C137S487500, C251S046000, C251S061400

Reexamination Certificate

active

06886580

ABSTRACT:
The present invention relates to a valve assembly for use in below freezing conditions which includes a valve housing with a connection to a supply of fluid, and a primary chamber, and a secondary chamber, and a flexible diaphragm, and an equalisation port, and a safety port the valve assembly characterised in that has a safety port associated with the secondary chamber wherein the safety port is configured to have a lower flow-rate than that through the equalisation port.

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