Caleffi 644442 Three-Way Zone Valve

Three-way heating zone valve with a telescopic bypass tee and an auxiliary switch.

Model / SKU: 644442
Category: Heating & Ventilation
Product type: Hydronic zone valve
Role: Actuator / load

Control & power

Control type: Open / close control
Power supply: 230 V AC

Use interlocked three-point/open-close control at the rated supply voltage; the auxiliary switch is a separate circuit.

A suitable smart controller can expose supported functions to Matter. The control type alone does not confirm electrical compatibility or actual position feedback.

Technical specifications

Connection: G1/2 maleSource ↗
Travel time: 40 seconds for 90°Source ↗
Maximum pressure: 10 barSource ↗
Bypass connection spacing: Adjustable 49–63 mmSource ↗
Enclosure: IP54Source ↗

Selection & installation notes

Select the valve according to the hydraulic circuit; it is not a generic potable-water shutoff assembly.

Sources & documentation (1)

Caleffi 644442 — manufacturer documentation ↗Reviewed Nov 5, 2026