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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
this assembly ensures consistent ignition and flame rectification across several flagship boiler lines
Key Benefits System Protection: Minimizes pressure spikes to prevent the relief valve from nuisance tripping
1 PSI span is required for the stroke length
Key Benefits High-Temperature Resilience: Engineered with silicone elastomer to maintain flexibility and seal integrity in high-heat steam and hydronic applications
ideal for low-pressure and high-vacuum recovery cycles
McDonnell & Miller 343500 Bellows Assembly R-410A this assembly ensures consistent ignitionWhen you are servicing a 64 Series low water cut off, the McDonnell & Miller 343500 Bellows Assembly (Model SA64 2) is the standard issue component required to restore essential boiler safety functions. This authentic replacement bellows assembly is engineered for heavy duty steam boiler control, specifically bridging the gap between the internal float mechanism and the electrical switch. As a direct fit part for 64 Series LWCO and 764 models, it
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