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Flow system control with time delay override means

  • US 4,268,383 A
  • Filed: 03/26/1979
  • Issued: 05/19/1981
  • Est. Priority Date: 03/26/1979
  • Status: Expired due to Term
First Claim
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1. A sewerage flow control system having an accumulating means for storing of sewerage and means for establishing a predetermined differential pressure in a line connected to said accumulating means and to said collector means and having a normally closed main valve means in said line upstream of said collector means for deliverying of accumulated fluid medium to said collector means, comprising a controller having sensing means to sense the pressure condition upstream of said valve means and having valve control means actuated by said sensing means for selectively opening said normally closed valve means to apply said pressure to the opposite side of the valve means and to establish a predetermined flow cycle for delivery of said fluid medium, and pressure control means to sense the pressure in the downstream side of the valve means with the valve means closed and connected to actuate said valve control means of said controller to open said valve means to initiate said flow cycle in response to an abnormal pressure condition between the valve means and the collector means and operating independently of the sensing means, and said pressure control means including a time delay means to restrict the response thereof to a time period in excess of transient abnormal pressure condition created between the valve means and the source means, whereby said valve control means is independently actuated by said sensing means and by said pressure control means.

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