A hydronic radiant zone valve is a critical component in a hydronic (water-based) radiant heating system. It is an electrically or thermostatically controlled valve that regulates the flow of heated water to different zones in a radiant heating system.

Key Features & Functionality:

Zone Control: It allows different areas (zones) of a building to receive heated water independently, improving comfort and energy efficiency.
Electric or Thermostatic Operation: Typically controlled by a thermostat, the valve opens or closes to regulate water flow to the designated zone.
Types: Common types include motorized zone valves, thermostatic actuators, and solenoid valves.
Materials: Made of brass, stainless steel, or composite materials to withstand constant water exposure and varying temperatures.
Integration with Pumps & Boilers: When the valve opens, it often triggers the boiler or circulation pump to deliver hot water to the zone.

How It Works:

When heat is needed, the thermostat signals the zone valve to open.
This allows hot water from the boiler to flow into the zone’s radiant tubing.
Once the desired temperature is reached, the thermostat signals the valve to close, stopping water flow.

Z075C2-2 3/4" Sweat 2-Was Sentry Zone Valve