Positioning Switch, Manual or Bleed, Non-rising low torque pressure adjustment knob.

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^^This 141 Positioning Switch is used to deliver any manually selected pressure over a range of 0 to 30 psi to air-operated equipment. This compact positioning switch has an adjustment knob that can be left free to rotate or held in position by snapping the locking ring. The positioning switch has an operating temperature of 0 to 150 degrees Fahrenheit. It can be mounted on surface or panel through a 1-7/32" diameter knockout.