quiet operation while providing superior tolerance to slipping and minor misalignment compared to raw-edge alternatives

making it a direct-fit solution for many modern hydronic systems

or debris between the coil and the valve stem preventing a solid magnetic seat

it is the standard for residential HVAC repair and light commercial heat pumps

as well as the narrower 4L and A series belts

Functional Devices RIBMNU1S Relay R-407A quiet operation while providing superiorThe Functional Devices RIBMNU1S Relay is a professional grade 15 Amp pilot relay designed for high reliability switching in BAS, HVAC, and lighting control applications. This track mounted modular relay features a versatile triple voltage coil, allowing for seamless integration into systems utilizing 10 30 Vac Vdc or a standard 120 Vac power source. Engineered for long term field performance, it utilizes a SPST (Single Pole Single Throw) contact