Method and apparatus for controlling the flow of process fluids

Details Method and apparatus for controlling the flow of process fluids Method and apparatus for controlling the flow of process fluids

1992-01-24

1994-06-07

Wayner, William E.

Heat exchange

Structural installation

62185, 62201, F25D 1702

Patent

active

053181069

ABSTRACT:
A method and apparatus for coupling a primary loop with a secondary loop for circulating processing fluids therebetween comprising in combination a first connection for the feed line of the primary loop and a second connection for the return line of the primary loop; a third connection for the feed line of the secondary loop and a fourth connection for the return line of the secondary loop; a crossover line coupling the four connections; first valve means for controlling the flow through the primary loop; first sensor means responsive to the flow across the crossover line to control the first valve means; second valve means in the path of flow through the crossover line; second sensor means responsive to the temperature of the process fluid in the secondary loop to control the second valve means; a common controller for the first and second sensor means adapted to control the first and second valve means as a function of the sensed temperature and flow; and a common controller for the first and second sensor means adapted to control the first and second valve means as a function of the sensed flow and temperature with means to limit the extent of opening of one of the valve means as a function of the extent of opening of the other of the valve means.

REFERENCES:
patent: 4497031 (1985-01-01), Froehling et al.
patent: 4498428 (1985-02-01), La Spisa et al.
patent: 4829779 (1989-05-01), Munson et al.
patent: 5104037 (1992-04-01), Karg et al.

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