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the replaceable valve insert and stainless steel spindle allow for maintenance and operator swaps without the need to drain or shut down the entire heating loop
the thermocouple generates the millivoltage necessary to hold the gas valve open
Key Benefits: Precise Fuel Calibration: Engineering-grade orifices optimized for propane’s specific gravity to ensure efficient combustion
check your specific model's parts list for the D-2531-00 reference
Atmospheric Integrity: Specifically designed to maintain a vacuum-tight seal in industrial HVAC equipment
Siemens Combustion QRA73.A17 Detector 30067439-890 the replaceable valve insert andThe Siemens QRA73. A17 is a precision engineered UV flame detector built for continuous supervision in high demand industrial and commercial combustion environments. Designed for seamless integration with LMV5 and LME7 burner management systems, this detector operates on a 110V 120V AC power supply and provides reliable monitoring for gas flames, blue burning oil flames, and ignition sparks. Featuring an integrated self checking mechanism, the unit
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