Title: Fluid flow control system
Application Number: 85108152 Application Date: 1985.11.05
Publication Number: 1002730 Publication Date: 1986.08.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01N21/72;G05D7/03
Applicant(s) Name: Perkin-Elmer Co. (US) 761 Main Avenue, Norwalk, Co Address:
Inventor(s) Name: Michael W. Kendall-Tobias
Attorney & Agent: QUAN GYONGLIU
Abstract:
    An apparatus which is especially useful in a flame atomic absorption spectrophotometer includes a master fluid flow path and a slave fluid flow path. A first valve is connected in the master path for controlling the rate of fluid flow therein. A first orifice device is connected in the master path. The slave path includes a pressure responsive fluid flow modulating valve having a control connection to the master path between the first orifice device and the first valve. The flow modulating valve is operable in response to the fluid pressure in the master path as reduced by the first orifice device and in response to the fluid pressure in the slave path as reduced by the second orifice device to control the fluid flow through the slave path.
Time: 6