Designed for installation in pipe lines from 1-1/4” and up, McDonnell & Miller standard FS7-4W series switches sense liquid flow in either direction to monitor flow/no-flow conditions. They are supplied in two paddle lengths, the paddle being trimmed during installation to permit switch actuation at the desired flow rate. As flow increases in a pipe, the paddle of the switch pivots to move out of the liquid path thereby activating the switch. Specifications - Construction: Brass or Stainless Steel
- 11⁄4" (32mm) NPT process connection – BSPT also available
- Suitable applications requiring a water-tight, dust-tight or a NEMA 4X rated flow switch
- Maximum Operating Pressure: 300 psi (21 kg/cm2); (1000 psi (70 kg/cm2) for Stainless Steel models)
- Sensitivity adjusting screw makes flow adjustment easy
- Operating Temperature: -65°F to + 300°F (-54°C to + 149°C)
- Switch: SPDT, 125 VA at 120 or 240vac, 50 or 60 cycles
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