PA404A1033/U
Pressuretrol Controller
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Two-Wire, SPST, Additive Differential Type, 0.5 To 9 psi Additive Adjustable Operating Range, 1 To 5 psi Adjustable Differential, 1/4 in. Female Pipe Threads Connection.
Features
The PA404A Is A Pressure Actuated High Limit, Safety Control For Steam Heating Boilers. It Breaks An Electrical Circuit To Shut Down The Burner If Steam Pressure Rises Above A Safe Level
Contains An SPST MICRO SWITCH Snap-Acting Switch
Sensitive Pressure-Actuated Diaphragm Expands Or Contracts With Pressure Variations, Moving A Lever Mechanism Which Operates The Snap Switch
A Screw On Top Of The Case Allows Set Point Adjustment Without Removing The Cover
Differential Is Adjusted By Means Of A Dial Located Inside The Case
For Use In 24, 120, 240 Or 277 Volt Control Circuits Or In Self Powered (Millivoltage) Applications