PEECO Paddle Flow Switches — Large Pipe & Low Velocity Liquid Service — Northeast Controls Inc.
Northeast Controls Inc.

PEECO Flow Switches

Paddle Flow Switches

Paddle-type flow detection for large pipe sizes and low-velocity liquid service

PEECO paddle-type flow switch

PEECO Paddle-Type Flow Switches

The PEECO paddle-type flow switch uses a paddle inserted into the flow stream to detect the presence or absence of liquid flow. When flow velocity exceeds the set point, the drag force on the paddle deflects it, actuating the microswitch. The paddle-type design is particularly well-suited for larger pipe sizes (1-1/2" and above) and lower-velocity liquid applications.

Multiple paddle styles are available — standard, perforated (for turbulent/pulsating flow), Teflon-coated (for corrosive service), flexible (for slurry), and extended (for very large pipes). Explosion proof enclosures available for hazardous locations.

Specifications

Mechanism
Paddle inserted into flow stream; deflection actuates switch
Pipe Sizes
1-1/2" to 12 ft. diameter or larger
Pressure Rating
To 600 PSI standard
Temperature Range
-450°F to +300°F standard; to +2,000°F with finned extension
Fluids
Liquids; best suited for lower-velocity liquid service
Paddle Materials
316SS standard; Monel, Hastelloy, Teflon-coated, PVC available
Body Materials
Carbon steel, 316SS, or any machinable metal
Connections
NPT screwed or flanged; tee or welded mounting available
Switch Action
SPDT standard; DPDT, SPST-NO, SPST-NC available
Enclosure
NEMA 1, NEMA 4, NEMA 4X, NEMA 7/9 (explosion proof)

Paddle Types

Standard Paddle

Flat paddle for general liquid service. Available in multiple widths to match pipe size and required actuation flow velocity.

Perforated Paddle

Holes in the paddle reduce drag — for turbulent flow, pulsating flow, or cavitating conditions where a solid paddle would cause nuisance trips.

Teflon-Coated Paddle

PTFE coating on the paddle for corrosive fluid service or where product contamination must be avoided.

Flexible Paddle

Flexible material paddle for slurry service or fluids containing suspended solids that could jam a rigid paddle.

Extended Paddle

Longer paddle for large-diameter pipes where the flow profile near the wall is lower than at the center.

Typical Applications

  • Large-diameter cooling water lines
  • Open channel and low-velocity flow detection
  • Pump protection in large pipe systems
  • Irrigation and water treatment systems
  • Fire suppression system flow detection
  • Chilled water and condenser water systems
  • Slurry and suspended solids service
  • Low-velocity process liquid monitoring

Custom-Engineered to Order

PEECO paddle flow switches are not off-the-shelf items. To request a quote, provide: fluid type, pipe size, flow rate range, operating pressure, operating temperature, electrical requirements, and area classification. Contact Northeast Controls Inc. for application engineering assistance.

1-201-419-6111 · [email protected]

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