Fluid handling – Self-proportioning or correlating systems – Self-proportioning flow systems
Patent
1975-12-24
1977-12-27
Cline, William R.
Fluid handling
Self-proportioning or correlating systems
Self-proportioning flow systems
137605, 137532, G05D 1100
Patent
active
040648915
ABSTRACT:
Apparatus is provided for admixing a relatively small quantity of one fluid with a larger quantity of another fluid in a proportion which remains relatively constant over a wide range of demand flow rates for the mixed fluids. The apparatus comprises a body having an inlet cavity and an outlet chamber in fluid communication therewith through an annular port. A disc-like valving member is mounted for displacement vertically in the chamber into elevations which depend on the rate at which a primary fluid flows through the annular port. A reservoir for a secondary fluid has an upwardly-open orifice and is located interiorly of the annular port. The valving member has a central tapered plug which depends into the reservoir-orifice, and the valving member is weighted so as to be biased downwardly by a constant pressure into a normally-closed position blocking fluid flow through the annular port. The elevation of the valving member in the chamber locates the plug relative to the orifice to vary the effective flow area of the orifice to insure the mixing of a metered amount of the secondary fluid with the primary fluid throughout a wide range of demand flow rates.
A balanced pressure bypass valve which is particularly useful in conjunction with the above apparatus in a firefighting system is also disclosed.
REFERENCES:
patent: 354835 (1886-12-01), Korting
patent: 974245 (1910-11-01), Donnelly
patent: 2211058 (1940-08-01), Guthmann
patent: 3647002 (1972-03-01), Lindsay
Cline William R.
Hale Fire Pump Company
Renz Jr. Eugene E.
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