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High-Pressure Rating: Certified for 400 PSI @ 100°F and 200 PSI @ 400°F to handle demanding steam applications
this SPST (Single Pole Single Throw) mechanical switch monitors differential air pressure to verify proper blower operation and venting before allowing the combustion cycle to proceed
the unit features a high-speed solenoid and a feedback loop to maintain accurate branch line pressure
03 resolves issues related to cracked ceramic insulators or clogged pilot ports that prevent a clean
McDonnell & Miller 94-HD Pump Controller Refrigerant High-Pressure Rating: Certified for 400The McDonnell & Miller 94 HD Pump Controller (Part Number 165300) is a high performance replacement head mechanism engineered for heavy duty commercial and industrial steam boiler applications. Designed specifically for Series 94 and Series 194 units, this combination low water cut off and pump control manages liquid levels in systems with a maximum pressure of 250 PSI. This assembly includes the No. 5 snap acting SPDT switch, providing reliable dual