Relief valve

Details Relief valve Relief valve

1989-10-31

1990-11-27

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

G05D 1620

Patent

active

049728725

ABSTRACT:
A pressure relief valve is disclosed that includes a ball valve and an electrically powered valve operator for opening and closing the valve in response to electrical signals. A conduit connects a piezoelectric pressure gauge to upstream pressure. The gauge sends opening and closing electrical signals to the operator when the pressure in the conduit reaches preselected amounts.

REFERENCES:
patent: 3308846 (1967-03-01), Yuile
patent: 3548866 (1970-12-01), Kaiser
patent: 4307750 (1981-12-01), Ledeen
patent: 4610256 (1986-09-01), Wallace

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