Rotary piston valve arrangement
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United States of America Patent
Stats
-
Nov 20, 1990
Grant Date -
N/A
app pub date -
Nov 15, 1989
filing date -
Nov 15, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary piston valve arrangement, for a pneumatic settling tank, including rotary piston valves disposed in a common housing, with a first rotary piston valve being designed for the control of an additive stroke, and a second rotary piston valve being designed for the control of a discharge position. To reduce the amount of air required for controlling the settling tank, an element is provided for periodically shutting off the passage of air between the air inlet opening of the first rotary piston valve and the settling chamber during the time interval of an intake position of the first rotary piston valve and a simultaneous discharge position of the second rotary piston valve.
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