The specific type of valve used in an Air Handling Unit (AHU) depends on its function within the system. AHUs use various valves to control airflow, water flow (for heating and cooling coils), and steam flow (in some cases). One example, based on the reference provided, is the Belimo R3015-1P6-S1, which is an electronic control valve used in AHU systems.
Here's a breakdown of common valve types used in AHUs and their purposes:
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Control Valves (Water Side): These valves regulate the flow of chilled water or hot water to the cooling or heating coils within the AHU. They are typically modulating valves that adjust the flow rate based on the temperature demand in the conditioned space. The Belimo R3015-1P6-S1 is an example of such a valve.
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Damper Actuators (Air Side): While not technically valves, damper actuators control the position of dampers, which are used to regulate airflow within the AHU. Dampers control the amount of fresh air intake, return air, and exhaust air.
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Balancing Valves: These valves are used to balance the water flow rates in different parts of the AHU's coil system, ensuring even heating or cooling across all coils.
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Shut-off Valves: Used for isolating sections of the AHU for maintenance or repair. These are typically ball valves or gate valves.
Therefore, the answer to which valve is used in an AHU is not a single valve but rather a variety of valves, each serving a specific purpose in controlling air, water, or steam flow. The specific choice of valve depends on the AHU's design and application.
