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Extreme Durability: IP67-rated enclosure and encapsulated windings protect against high humidity and aggressive environments
standardized interface that simplifies complex wiring configurations
allowing for full-range adjustment via the integrated serrated thumbwheel
The valve features a 2-way flow pattern where the "stem up" position opens the flow from port A to AB
Low Airflow Resistance: Engineered pleat spacing optimizes surface area
Caleffi ZVR104 Relay 321894-706 Extreme Durability: IP67-rated enclosure andThe Caleffi ZVR104 is a professional grade 4 zone valve relay designed for precise control of hydronic heating systems. Serving as a direct HPZC104 replacement, this multi zone controller manages up to four zone valves and features priority zoning functionality, allowing a single zone to be designated for domestic hot water (DHW) production. Engineered with a multi pin selectable priority option, the ZVR104 ensures that space heating loads are
