Weil McLain 510-312-091 Hi-Low Limit 340155-7026 The NBR (Nitrile) seals are

The NBR (Nitrile) seals are optimized for air

Engineered with a 48 Nema frame size and a 5

It is an essential component for contractors looking to restore system efficiency in air handlers and heating units where HVAC blower shaft replacement or full assembly upgrades are required

Industry Certified: UL recognized and CSA certified for safety and performance compliance

ensuring exact bolt-hole alignment and shaft dimensions

Weil McLain 510-312-091 Hi-Low Limit 340155-7026 The NBR (Nitrile) seals areThe Weil McLain 510 312 091 Hi Low Limit is a specialized hydronic control engineered for precise water temperature regulation in residential and commercial boiler systems. Designed for field proven reliability, this aquastat limit control manages the high limit (to prevent system overheating) and the low limit (to maintain base water temperature), crucial for boilers equipped with tankless coils. This W M OEM part features a 120 VAC power rating with