Model 624

SKU: 624

Flow Switch, Inline Body, Full Swing Paddle

The Delta Controls Model 624 is a highly reliable target actuated flow switch whose body fits into and becomes part of the pipeline. It is equipped with a full swing target and has an open bore matching that of the pipeline. The 624 has a flat blade-type target that rotates 90 degrees in response to increasing flow rate. At the precalibrated set point, the switch actuates. The target moves until it is flush against the inside of the pipeline wall. The body bore is then unobstructed and the flow is unrestricted. The 624 has a negligible pressure drop at high velocities for 2 to 8 inches (50 to 200 millimeters) pipelines with flow velocities possible in excess of 50 feet per second (15 meters per second).

Connection of the target to the output switch is done magnetically. A heavy-duty solid sealing tube separates the process fluid from the switch mechanism. Failures due to seal, diaphragm, bellows corrosion and leaks are eliminated.


  • Non-restricting full open bore
  • Highly reliable magnetic coupling
  • Compact size


  • Style: Inline
  • Type: Paddle; Full Swing
  • Temperature: -4 °F to 400 °F (-20 °C to 204 °C)
  • Pressure:
  • Standard: ≤ +2000 psig (137.9 bar)
  • Optional:+5000 psig (+344.7 bar)
  • Actuation: ≥ 7.0 gpm (26.7 L/min) (water)
  • Deactuation: ≥ 3.0 gpm (11.7 L/min) (water)
  • Accuracy:≤ 10%
  • Output: SPDT or DPDT, 5 A
  • Available Wetted Materials: 316 Stainless Steel, 416 Stainless Steel, carbon steel
  • Housing: Stainless Steel, aluminum
  • Process Connection:
  • Threaded:1 in to 4 in FPT
  • Flanged:1 in to 4 in
  • Rating: ≤ 150 lb

Certifications & Approvals

  • Stainless Steel Housing Options Only: Third Party Listed by CSA NRTL/C (USA and Canada)

Required Ordering Information

  • Detailed model number
  • Complete application number
  • Tag or nameplate detail (if required)
  • Documentation/testing tiers (if required, refer to Additional Resources in the product catalog)
  • Basic Type - Switch Point - Switch Action - Flow Direction Max Pressure - Pipeline OD / ID - Dimension 'A' - Fluid SPG Fluid Viscosity - Name of Fluid - Normal Flow - Max Flow

Additional Information


Flow Switch, Inline Body, Full Swing Paddle

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