Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1993-04-06
1994-05-24
Nilson, Robert G.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
73201, 7386165, 251288, F16K 3700
Patent
active
053139801
ABSTRACT:
Liquid flow through a conduit in a branch of a hydronic system provided with a balancing valve and, in series therewith, a metering valve to obtain a desired rate of flow in the branch is regulated by positioning immediately adjacent the metering valve in the conduit a pitot having an upstream side directed upstream against a direction of flow through the conduit and a downstream side directed downstream in the flow direction. The metering valve is settable in a plurality of predetermined positions each corresponding to a respective flow cross section through the conduit. A differential pressure meter is connected to both sides of the pitot, the one of the predetermined valve positions is selected that gives a near full-range reading on the meter, and the metering valve is set in this selected one position. The pressure-differential reading on the meter is monitored and the balancing valve is adjusted to regulate flow therethrough until the read pressure corresponds to a level itself corresponding to the desired rate of flow in the branch.
REFERENCES:
patent: 3086548 (1963-04-01), Galiger
patent: 3355946 (1967-12-01), Lazell
patent: 3537473 (1970-11-01), Dezurik
patent: 4672728 (1987-06-01), Nimberger
patent: 4959990 (1990-10-01), Morris
Bell & Gossett ITT; "A Great Idea Just Got Better" IT-8021 1 page. (undated).
Midwest-West Instrument; Delta Tube "The Averaging Pitot System With Minimum Pressure Drop and Best . . . "; Bulletin No DT-GPB/91, 2 pages (undated).
Armstrong--File No. 5036115/1 Feb. 90; "Circuit Balancing Valves" 6 pages (undated).
Gerand Engineering Co.--Bulletin-100 Apr. 1, 1985; "For Accurately Indicating Flowrated in Hydronic Systems"; 5 pages (undated).
MNG--Technical information--16 bars (230) p.s.i.; "Kombill" Balancing, contrl and shut-off valve with PTFE disc. 6 pages (undated).
Dubno Herbert
Nilson Robert G.
Wilford Andrew
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