Caleffi Z55 24V NC 2-Way Zone Valve 3/4" Sweat 7.5 Cv with Auxiliary Switch

The Caleffi Z55 is a professional-grade 24-volt normally closed (NC) 2-way zone valve designed for hydronic heating and cooling systems. This valve features 3/4-inch sweat copper connections for reliable, leak-free installation in both residential and light commercial applications.

Key Specifications:

• 24VAC normally closed operation - valve closes when power is removed for fail-safe protection
• 3/4-inch sweat connections for copper piping systems
• 7.5 Cv flow coefficient provides excellent flow capacity for zone control
• Integrated auxiliary switch for system control and zone status monitoring
• Convenient terminal block for simplified electrical connections
• 2-position operation (fully open or fully closed)
• Compact design for easy installation in tight mechanical spaces

Features & Benefits:

• Normally closed design ensures zones remain closed during power failure
• Auxiliary switch enables boiler/circulator interlock and end switch functionality
• Terminal block simplifies field wiring and reduces installation time
• High-quality brass body construction for durability and long service life
• Removable actuator allows for servicing without draining the system

Ideal for zoned hydronic heating systems, radiant floor heating, fan coil units, and other applications requiring precise zone control. The Z55's reliable normally closed operation and auxiliary switching capability make it an excellent choice for both new construction and retrofit projects.