Caleffi Z121000 Motorized Zone Valve ActuatorThe Caleffi Z121000 Motorized Zone Valve Actuator is a 24V AC, 2 position actuator with spring return operation, designed for precise valve control in hydronic systems, including open or closed loop configurations. It delivers dependable valve positioning for reliable zone heating and cooling, with an integrated microswitch providing feedback for control safety and coordination with your boiler or circulator. Key specs ensure durable, code compliant

it withstands frequent cycling and maintains reliable contacts

it fits compactly at 5" W x 2-1/4" D x 3-9/16" H and offers a 1/2" stroke

The durable rectangular horizontal cover suits modern interiors and wiring is straightforward with terminals such as RC

Type: Control board for reliable furnace control

UL/CE/CAN/CSA/ISO 9001 approvals

This 1 inch nominal size unit features a threaded end connection and a SPDT snap switch to deliver precise on/off signals as flow is detected

The lead wire length is 5-1/4 inch

5–95% humidity

setpoint 50–90°F

2–10 V DC control signal at 0

it emphasizes robust sealing

automatic room comfort