Caleffi 520519AC AngleMix 3-Way Thermostatic Mixing Valve 3/4" Sweat Union with Inlet Check Valves, Cv 2

The Caleffi 520519AC is an AngleMix 3-way thermostatic mixing valve with 3/4" sweat union connections and inlet check valves. It mixes supply and return water to deliver a controlled outlet temperature to the heating circuit.

AngleMix valves are 3-way thermostatic mixing valves for hydronic heating systems. They blend hot supply water with cooler return water to hold a steady, adjustable supply temperature for low-temperature circuits such as radiant floor heating. The angle body pattern simplifies piping on near-boiler and manifold installations. The built-in check valves on the inlets help prevent unwanted thermosiphoning and cross-flow between the hot and cold ports.

Before ordering, confirm your piping is 3/4" and suited to sweat connections, and that a flow capacity of Cv 2 matches your circuit's design flow. This valve is for hydronic heating, not for potable hot water tempering.

Specifications

• Brand: Caleffi
• Manufacturer Part #: 520519AC
• Series: AngleMix (520 Series)
• Type: 3-Way Thermostatic Mixing Valve, Angle Pattern
• Size: 3/4"
• Connection: 3/4" sweat (copper) union x sweat union
• Flow Capacity (Cv): 2
• Material: Brass
• Check Valves: Inlet check valves
• UPC: 8016615613988
• Category: Mixing Valve - Angled

Documents

• Technical Data Sheet (PDF)
• Installation & Operation Manual (PDF)
• Submittal Sheet (PDF)
• Product Brochure (PDF)

See also: mixing valve - angled, all Caleffi products.