Visbreaker letdown valve

Details Visbreaker letdown valve Visbreaker letdown valve

1981-10-19

1983-05-17

Marcus, Stephen

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

1376254, 166 91, 251122, 251124, F15D 108

Patent

active

043835538

ABSTRACT:
A visbreaker, letdown valve is featured which maintains a smooth flow of furnace effluent. Liquid passing through the throat of the valve is throttled, and a portion is caused to flash to vapor. The valve is designed to allow for subsonic flow of the vapor under all process conditions. A quenching fluid is also added to the liquid passing through the throat in order to cool the liquid.

REFERENCES:
patent: 2084397 (1937-06-01), Hildebrandt
patent: 4292991 (1981-10-01), Wing

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