Apparatus for indicating true furnace draft

Details Apparatus for indicating true furnace draft Apparatus for indicating true furnace draft

1977-11-28

1978-10-03

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Mounting and connection

73212, G01L 700

Patent

active

041177347

ABSTRACT:
Apparatus for attachment to a furnace system for indicating furnace draft, comprising piezometric chamber means for indicating true average atmospheric pressure, connected by a small diameter pressure tube to an inclined tube draft manometer, the second end of which is inserted through the wall of the furnace to the interior thereof. The piezometric chamber comprises a first vertical elongated pipe, closed at top and bottom, with a plurality of small diameter ports drilled near the base and evenly spaced around the circumference. A second pipe of smaller diameter is inserted co-axially through the bottom closure. The smaller pipe has an annular baffle plate attached about its outer surface inside of the larger pipe, to provide a narrow annular passage for air flow from the ports to and from the interior of the smaller second pipe.

REFERENCES:
patent: 2271863 (1942-02-01), Holm
patent: 3950995 (1976-04-01), Marshall

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