A zone valve is a specific type of valve designed to control the flow of water, prevent reverse flow, and steam in a hydronic heating or cooling system. To improve efficiency and make occupants comfortable, heating and cooling systems are usually divided into multiple zones. In multiple story homes, the system could use different zones for each floor or different areas on a single floor. A system can be zoned using multiple circulator pumps or a single circulator pump and zone valves. These valves can be used in a wide variety of heating and condensing cooling applications, such as baseboards, fan coils, radiators, convectors, air handlers, heat pumps, and radiant applications. Zone valves used in home systems are usually electrically powered. Zone valves used in larger commercial applications can be vacuum or compressed air powered as well as electrically powered. Zone valves specialize in flow control for hydronic heating and cooling. A mechanical coupling connects the motor to the water valve. An aluminum cover protects the motor attached to the valve.
This also helps prevent water hammer noise and provides a smooth transition to prevent reverse flow.
A multi-zone valve system will lower the initial installation cost vs.a multi circulating pump system, lower power consumption, and make it easier to maintain certain heating and cooling systems. However, a zone valve system is dependent on only one pump without the inherent redundancy of a multi-pump system. If the pump fails, the system becomes inoperable.
One zone valve is used per heating zone or area (or loop of heating piping) which are connected to individual thermostats. When the thermostat calls for heat in that particular area, the thermostat switch causes the zone valve to open, permitting hot water to flow to that zone. The valve can be located right after the boiler and circulator (hot side) or can be located at the end of the zone circuit (cold side).
Taco Zone Sentry Valves and Honeywell Zone Valves are the most technologically advanced zone valves made, are easily installable, and simple to operate. The primary use of Zone Sentry Valves is in heating systems. They can be installed in convectors, air handlers, baseboards, heat pumps, radiant applications, and fan coils. Zone Sentry Valves are able to be put in at any direction and orientation besides chilled water installations. You can even mount the actuator to the valve body. Zone Valve controls allow for manual open in their heavy-duty hydronic systems. Taco Zone valves have an in-depth, step-by-step operating and instruction manual that includes diagrams and everything you would need to know about zone valves. Replacement parts will be harder to come by if you get specialized parts, but if they are installed properly, the likelihood of needing to replace parts drops immensely.
We carry the full line of Taco Zone Sentry zone valves to fit any need and application. Choose from 2-way Zone Sentry valves, 2-position Zone Sentry valves, 4-zone Zone Sentry valves and more. You'll find a variety of brands such as Taco, Honeywell, Automag, and Caleffi in sizes including 1/2″ and 3/4″, styles, and connection types including sweat, threaded, press, and inverted flare.