This thermal expansion valve installation requires brazing with a heat sink to protect the internal diaphragm and needle assembly

Engineered to provide accurate thermistor readings

the models are identical in specifications

The 40XL features an extended 4-inch thermostat probe

Tekmar Controls M3061 Adapter Kit 318423-701 This thermal expansion valve installationThe Tekmar Controls M3061 Adapter Kit is a field essential solution designed specifically for retrofitting the Tekmar M3062 Actuator onto legacy cast iron mixing valves. This hardware set eliminates the need for full valve replacement when updating hydronic control systems, allowing contractors to maintain existing infrastructure while upgrading to modern modulating 0 10V DC or 4 24mA actuation. The M3061 kit ensures precise mechanical alignment