Weil McLain 510-312-090 Control R-410A its compact design and reliable

its compact design and reliable on/off/floating logic make it a standard replacement for many VAV box actuators and small air dampers

non-spring return direct coupled actuator engineered for high-torque HVAC applications

though horizontal installation is preferred to minimize friction on the TD52 replacement disc

provides the essential OEM replacement parts required to fix a stuck zone valve rubber ball or a degraded EPDM O-ring seal

identical replacement for the Barber Colman 2472-140

Weil McLain 510-312-090 Control R-410A its compact design and reliableThe Weil McLain 510 312 090 Control is a specialized EZ Temp combination operating limit and manual reset high limit switch engineered for hydronic boiler systems. This OEM Weil McLain replacement part serves a critical dual purpose role: regulating system temperature within a 130 230F operating range and providing a secondary fail safe to shut down burners if water temperatures exceed safe thresholds. Featuring a 1 2 inch NPT connection, the 510 312