Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1990-04-02
1990-12-04
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137392, G05D 912
Patent
active
049746260
ABSTRACT:
In a so-called condensate trap for discharging condensate, e.g. oil or water from a fluid system which contains air or a gas or vapor under pressure, a single tube which projects into a housing in which the condensate collects contains spaced sensors of an electric capacitive type sensing the maximum level which the condensate is to be allowed to reach within the chamber and a predetermined lower level. A signal from the upper sensor triggers a pilot valve which opens a diaphragm-type discharge valve and a signal from the lower sensor initiates closing of the valve, but only after a time delay, allowing the condensate to fall first to a level below that of the lower sensor. This time delay is related to the time taken for the condensate to fall from the maximum level to that of the lower sensor. The control unit and sensor tube form a self-contained structural assembly for easy installation and replacement. In the floor of the housing forming the condensate collecting chamber there is a weir or well to prevent sediment reaching the diaphragm valve.
REFERENCES:
patent: 2295097 (1942-09-01), Waugh
patent: 2529796 (1950-11-01), Cade
patent: 3292650 (1966-12-01), Bird et al.
patent: 3905385 (1975-09-01), Green
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