Two-stage precoalescer unit
AssigneeRoanoke College
InventorVirgil L. Frantz
Life of this patent
Estimating the term…
Abstract
Two-stage precoalescer unit for filtering, coalescing and separating from contaminated compressed gas loose oil and water in a first stage and oil and water aerosol or vapor in a second stage, the coalescers of the first and second stages being mounted in tandem in a perforate-walled canister contained in a housing within an imperforate tube, the first-stage coalescer relatively permanently for periodic purging by gravity and a reverse flow of gas and the second-stage coalescer removably, for purging over an extended period by a reverse flow of purge gas and thereafter removal and replacement on detachment of a lower from an upper part of the housing, and a spring-pressed floating follower in the housing above and acting downwardly on the canister for compensating for manufacturing tolerances in components of the precoalescer unit.
Claims9
A two-stage precoalescer unit interposable in the flow path of contaminated compressed gas between a compressor or other source and desiccant-containing decontaminating means for coalescing and separating in successive stages loose oil and water and oil and water aerosol from the gas, comprising a housing having separable upper and lower parts, a perforate-walled canister in said housing, first and second stage coalescers mounted in tandem in said canister for respectively filtering, coalescing and separating loose oil and water and coalescing and separating oil and water aerosol from said gas, means in said canister separating said coalescers and forcing said gas to flow therethrough in different directions, and an imperforate tube contained in said housing and containing said canister for defining with said housing and canister flow paths of said gas through said precoalescer unit.
A two-stage precoalescer unit interposable in the flow path of decontaminated compressed gas between a compressor or other source and desiccant-containing decontaminating means for coalescing and separating loose oil and water and oil and water aerosol in successive stages from said gas, comprising a housing having a detachable top cap, inlet and outlet ports in said cap and connectable respectively to said source and said decontaminating means, a perforate-walled canister in said housing below said top cap, vertically spaced first and second stage coalescers mounted in tandem in said canister, and a spring-urged floating follower in said top cap and acting downwardly on said canister for compensating for manufacturing tolerances in said precoalescer unit.
A plural-stage precoalescer unit positionable in the flow path of contaminated gas from a compressor or other source for coalescing and separating loose oil and water and oil and water vapor from the gas in a plurality of successive stages, comprising a housing, a perforate-walled canister in said housing, first and second stage coalescers contained in tandem in said canister for respectively filtering, coalescing and separating loose oil and water and coalescing and separating oil and water vapor from said gas, inlet, outlet and draing ports in said housing, normally open outlet and normally closed drain valves in the housing and alternately seatable in vertically spaced internal valve seats, a piston mounting said outlet valve and having a head exposable to actuating gas, said valves being mounted on opposite end portions of a common stem for movement in unison against opposing spring forces respectively to open said drain port and close said outlet port on application of actuating gas to said piston.
Dependencies are inferred from the claim text.