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Weir valve sampling/injection port

  • US 4,977,929 A
  • Filed: 06/28/1989
  • Issued: 12/18/1990
  • Est. Priority Date: 06/28/1989
  • Status: Expired due to Fees
First Claim
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1. A weir valve for fluids comprisinga valve housing having an open interior and (a) an elongate weir traversing the open interior and dividing the interior into first and second chambers at opposite sides of the weir, said second chamber being elongate and extending along the weir, said second chamber having opposite end portions and being substantially free of obstructions to fluid flow longitudinally therethrough,operating means including a diaphragm having a portion lying across the weir to prevent fluid flow over the weir and between the chambers,the housing having a flow port communicating with said first chamber and a pair of fluid flow ports respectively communicating with said second chamber at said opposite end portions.

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