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Ships within 48 hours · Estimated delivery Sep 17 - Sep 22
For differential pressure monitoring
providing a critical fail-safe position for specific system requirements
Can this be used on AM or NM series actuators
Key Benefits Precise Thermal Protection: Features a fixed L170-30F high limit to shut down burners before the heat exchanger reaches critical temperatures
Is this the correct replacement for my Miller or Intertherm furnace
McDonnell & Miller 51-S-HD Water Feeder Refrigerant For differential pressure monitoringThe McDonnell & Miller 51 S HD (Part Number 135800) is a heavy duty head mechanism only replacement designed specifically for Series 51 S mechanical water feeders. Engineered for high capacity systems up to 35,000 sq. ft., this unit is critical for maintaining precise water levels in low pressure steam and hot water boilers. Proportional feed action ensures a steady response to boiler demand, preventing the rapid cycling that stresses high volume
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