Purge valve assembly

Details Purge valve assembly Purge valve assembly

1990-05-31

1991-10-15

Hepperle, Stephen M.

Fluid handling

Systems

Plural noncommunicating flow paths

137607, 431163, F16K 11076

Patent

active

050565591

ABSTRACT:
A purge valve assembly for purging the burner of a large scale power boiler of fuel oil has an air driven rotary actuator with a rotor coupled to two three-way valves such that when the actuator is in a first position, the burner is shut down, in a second position, the burner is purged of oil, and in a third position both steam and oil pass to the burner for combustion. The second or purge position is maintained by impressing air under pressure at equal pressures on both sides of the rotor.

REFERENCES:
patent: 3110228 (1963-11-01), Shramu
patent: 4146056 (1979-03-01), Buchanan
patent: 4579143 (1986-04-01), Rollins et al.
patent: 4655252 (1987-04-01), Krumhansl
patent: 4823843 (1989-04-01), Golembiski

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