Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1990-04-30
1991-05-28
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
13710111, 137538, F16K 1704
Patent
active
050185470
ABSTRACT:
A pressure actuated valve is normally closed by the action of an externally manually adjustable spring that acts against the back side of the valve element. The valve element surface opposite that of the adjustment spring is exposed to a first port in the valve body, which first port is connected to a primary fluid flow line. At a location on the valve body there may be one or more side ports that communicate with the interior of the valve body in which pressure at side port/s will not affect the valve element. When flowing fluid back pressure is exposed to the valve element at the first port, said pressure overcomes the spring force and opens the valve element. Wherein it exposes a pressurized fluid/s to the valve interior through one or more side ports that will then establish a communication to the first port. Metered high pressure fluid/s then flow into the side port/s, forced through the valve and into the primary flowing fluid that created the initial back pressure to open the valve. This metered fluid is maintained at a pressure sufficient to overcome the flowing primary fluid back pressure, allowing this metered fluid to be introduced into the primary flowing fluid, but is sufficiently low that the back pressure of the metered fluid/s, alone, will not maintain the valve in the open position. When the primary fluid flow ceases, the valve element will close and isolate the side port/s and metered fluid/s.
REFERENCES:
patent: 1172527 (1916-02-01), Hill
patent: 1303762 (1919-05-01), Bradford
patent: 2011333 (1935-08-01), Clifton
patent: 2655173 (1953-10-01), Overbeke
patent: 3974847 (1976-08-01), Hodges
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