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Fisher™ NotchFlo™ DST

  • Manufacturer: FISHER
  • Valve Type: Fisher Control Valves - Control valves are valves used in pipelines to control operating conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to a process signal. Fisher®, BaumannT, and POSI-SEALT
  • Sub-Type: Fisher Control Valves
  • Designed to prevent cavitation.
  • Has a pressure drop limit of 290 bar (4200 psi).
  • Can pass up to 12.7 mm (1/2 in) diameter particulate.
  • The protected seat design separates the shutoff function from the throttling function to protect the seating surfaces from throttling wear.
  • Hardened metal seats provide tight shutoff to minimize seat erosion.
  • Cage-type trim allows removal and inspection of parts without taking the valve body out of the pipeline.


Fisher NotchFlo DST control valves are designed for dirty, cavitating services. The trim in this valve utilizes a series of flow restrictions and expansions to eliminate cavitation, while allowing up to 12.7 mm (1/2 in) diameter particulate to pass through without plugging.


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Control Valve Fisher

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