Belimo Z2ZN0042 Zone Valve Cv Normally Closed with Auxiliary Switch HVAC Control Valves & Actuators - 1/2 2-Way 2.5 24V

The Belimo Z2ZN0042 is a 1/2-inch two-way zone valve designed for precise control of hot or chilled water in HVAC hydronic systems. This 24-volt normally closed valve features a 2.5 Cv flow coefficient and includes an integrated auxiliary switch for system monitoring and control feedback.

Key Features:

• 1/2-inch NPT connection size for easy integration into existing piping systems
• Two-way valve configuration for on/off flow control
• 2.5 Cv flow coefficient provides balanced flow capacity for residential and light commercial applications
• 24V AC/DC control voltage for compatibility with standard HVAC control systems
• Normally closed (N/C) operation ensures fail-safe position when power is removed
• Integrated auxiliary switch provides proof-of-position feedback to building automation systems
• Durable brass construction for long service life in hydronic applications
• Fast acting spring return for quick shutoff when control signal is removed

This zone valve is ideal for fan coil units, unit heaters, radiant heating systems, and other hydronic terminal equipment where reliable on/off control with position feedback is required. The auxiliary switch enables simplified wiring for pump control, alarm indication, or status monitoring in building management systems.