Variable orifice valve for air stream containing particulate...

Details Variable orifice valve for air stream containing particulate... Variable orifice valve for air stream containing particulate...

2006-10-17

2006-10-17

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

C110S1010CD, C251S122000, C137S375000

Reexamination Certificate

active

07121296

ABSTRACT:
A variable orifice valve for balancing the flow of particulate coal in an air stream relative to other parallel conduits. The valve comprises a section of conduit which changes in area along its flow axis and a variable position valve element mounted within the conduit section. The valve element has a shape which proximates that of the conduit section and is movable axially to vary the annular area of the flow path around the valve element. There is no valve seat and, therefore, the valve is always open to some degree.

REFERENCES:
patent: 3815627 (1974-06-01), Farrell et al.
patent: 4413646 (1983-11-01), Platt et al.
patent: 4556157 (1985-12-01), Shapland
patent: 4796651 (1989-01-01), Ginn et al.
patent: 4907741 (1990-03-01), McIntyre
patent: 4976377 (1990-12-01), Higuchi et al.
patent: 5741002 (1998-04-01), Breyer
patent: 6009899 (2000-01-01), Polutnik
patent: 6016832 (2000-01-01), Vars et al.
“Pulverized Coal Line Valves” brochure, Power & Industrial Services Corporation, cover and pp. 3-4.

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