Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1991-10-21
1993-02-02
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
13750514, F16K 1120, G05D 1606
Patent
active
051830728
ABSTRACT:
An automatic switchover valve includes first and second regulator valves arranged to oppose each other axially in a single housing, and ducted in a parallel configuration within the housing. Each regulator valve includes an inlet port, a diaphragm poppet valve, and a common outlet port. Each regulator valve includes structure for adjusting the pressure setting of the diaphragm poppet valve. During operation, the poppet valve of the first regulator valve is selectively adjustable between a first setting providing a first pressure P.sub.1, and a second setting providing a second pressure P.sub.2 less than P.sub.1 by an amount equal to 2 p. The poppet valve of the second regulator valve is preset at a reference pressure P.sub.R wherein P.sub.1 >P.sub.R >P.sub.2, and P.sub.1 -p=P.sub.R =P.sub.2 +p, and wherein p is greater than or equal to the incremental pressure characteristic of the regulator poppet valves.
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Product Brochure: CR44-2200 Series, TESCOM Corporation, Pressure Controls Division, no date disclosed.
Hepperle Stephen M.
Matheson Gas Products, Inc.
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