Method and apparatus for controlling a fluid flow valve

Details Method and apparatus for controlling a fluid flow valve Method and apparatus for controlling a fluid flow valve

1992-01-17

1994-04-19

Joyce, Harold

Ventilation

Workstation ventilator

Covered workbench chamber

B08B 1502

Patent

active

053040937

ABSTRACT:
A method and apparatus for controlling a fluid flow valve with a linear control loop such that the error signal utilized to actuate a variable rate controller for moving a valve control element or for controlling another valve control parameter is the same for a given control parameter change regardless of the current control parameter value or the current or desired fluid flow through the valve. A non-delayed indication of current fluid flow is also generated.

REFERENCES:
patent: 4155289 (1979-05-01), Garriss
patent: 4706553 (1987-11-01), Sharp et al.
patent: 4741257 (1988-05-01), Wiggin et al.
patent: 5092227 (1992-03-01), Ahmed et al.
Phoenix Controls Corporation Brochure, "FHS-300, Manifold Fume Hood Control System", Two Pages.
"Linear, Make Up Air Control Valve Specification", May 1987.
"Linear Exhaust Air Control Valve Specification", May 1987.
"MA-VVS Mark Air Valves", Mark Hot Inc. Air Distribution Equipment, Four Pages.
Mitco, A Division of Norwood Manufacturing Corporation, "Variable Air Volume by Mitco, The Simplest VAV Devices on the Market Today", Four Pages.
Phoenix Controls Corporation, "Venturi Valves", Brochure.

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