Solar water heating system
This patent describes an atmospherically sealed regulating valve initially opening to pass fluid at a minimum selected pressure and remaining open to pass fluid until the fluid pressure reaches a selected reduced pressure. It comprises: housing means, cap means enclosing the open end of the housing means, valve element means movable axially in the housing means, first chamber means in the housing means axially surrounding one end of the valve element means, second chamber means in the housing means axially surrounding the other end of the valve element means, bore means extending through the valve element means connecting the first chamber means and the second chamber means, fluid inlet passage means supplying fluid to the first and second chamber means, third chamber means in the housing means communicating with fluid outlet passage means, and biasing means permitting movement of the valve element means for fluid communication between the first chamber means and the third chamber means at the minimum selected pressure in the fluid inlet passage means and effecting movement of the valve element means for interrupting fluid communication between the first chamber means and the third chamber means at the selected reduced pressure the biasing means being a spring washer that is a bowed flexible annular member interposed between a circular seat within the housing means and the juncture of a body portion of the valve element means and an enlarged guide section.
- Assignee:
- NOV; NOV-91-018033; EDB-91-122656
- Patent Number(s):
- US 4998558; A
- Application Number:
- PPN: US 7-475292
- OSTI ID:
- 5425080
- Resource Relation:
- Patent File Date: 5 Feb 1990
- Country of Publication:
- United States
- Language:
- English
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