Pressure responsive, manually opening valve

Details Pressure responsive, manually opening valve Pressure responsive, manually opening valve

1980-07-11

1982-08-10

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137494, F16K 1700

Patent

active

043433278

ABSTRACT:
A pressure-responsive valve operable to close when the pressure falls below predetermined minimum level. After closure, the valve must be manually reset to its open position where it is retained by the pressure of the fluid against a diaphragm positioned within a chamber adjacent the valve. When used in conjunction with a oil-fired boiler, the valve prevents boiler flareback by closing when the pressure falls below a predetermined minimum level and by requiring a monitored, manual reopening, thereby preventing undesired ignition.

REFERENCES:
patent: 354017 (1886-12-01), Helm
patent: 1247149 (1917-11-01), Ray
patent: 2147850 (1939-02-01), MacLean
patent: 2637331 (1953-05-01), Sullivan
patent: 2824572 (1958-02-01), Smith
patent: 2871826 (1959-02-01), Edmund
patent: 3661173 (1972-05-01), Bauer

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