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Honeywell Pa404a 1009 Pressuretrol Steam Boiler Control Switch Controller

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Price:
$148.39
Free shipping
Estimated delivery Fri, May 17 - Mon, May 20
Returns:
30 days returns. Seller pays for return shipping.
Condition:
New
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. The PA404B is used with suspension-type unit heaters to make the fan circuit when a pressure rise indicates the presence of steam. Each model 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..