Jet pump with improved control valve and pressure relief valve t

Details Jet pump with improved control valve and pressure relief valve t Jet pump with improved control valve and pressure relief valve t

1999-08-25

2000-05-30

Huson, Gregory L.

Fluid handling

Line condition change responsive valves

Direct response valves

137540, F16K 1500

Patent

active

060680229

ABSTRACT:
A jet pump includes a jet pump nozzle and a pressure relief valve. The pressure relief valve includes an inlet, a valve seat around the inlet, and an unregulated outlet downstream of the valve seat. A valve member is mounted in the valve body to move between a closed position and an open position, and a spring reacts against the valve body to bias the valve member to the closed position. The valve seat defines a first area A1, the valve member defines a second area A2, and the ratio A2/A1 is selected to provide a hysteresis between opening and closing pressures as measured at the inlet of at least 6 psi. This hysteresis improves efficiency of operation of the jet pump nozzle.

REFERENCES:
patent: 3612099 (1971-10-01), MacManus
patent: 4213021 (1980-07-01), Alexander
patent: 4350176 (1982-09-01), Lace
patent: 4350179 (1982-09-01), Bunn et al.
patent: 4936339 (1990-06-01), Bennett
patent: 5265642 (1993-11-01), Buckminster et al.
patent: 5435337 (1995-07-01), Kemp

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