Resideo VCZAR1100 2-Way Zone Valve 1" NPT 6.6 Cv

Resideo VCZAR1100 is a two-way cartridge cage valve for hydronic zone control in boiler, chiller, and radiant floor heating/cooling systems. The bronze body features 1" NPT inlet and outlet connections with a stainless steel stem and Ryton/Noryl cartridge, delivering 6.6 Cv linear flow. It supports 2-way spring return operation with a 300 psi maximum pressure rating and 203°F maximum fluid temperature, and is compatible with glycol solutions up to 60% concentration for hot or chilled water service. CSA certified for residential and commercial applications. This valve serves as an OEM replacement compatible with Belimo systems, cross-referencing to VCZAR1100/E and VCZAR1100/U configurations. It requires a separately sold VC series on-off actuator to operate. Installation is professional-required; a valve wrench, system flush kit, and glycol solution are recommended accessories during service. Common failure symptoms indicating replacement need include zones not heating or cooling properly, uneven temperature distribution, valve stuck open or closed, or slow response to thermostat calls.