HVAC Butterfly Valves: Wafer vs Lug for Chilled Water Systems

Butterfly valves are the default isolation valves in HVAC — chilled water, condenser water and district cooling. The main choice is wafer vs lug, plus actuator type.

Wafer for Most HVAC Lines

For standard chilled water and condenser lines (not dead-end), a wafer butterfly valve is the economical choice: DN50–DN600, PN10/PN16, EPDM seat, lever or gear operator.

Lug for Dead-End and Isolation

Use lug valves where you need to isolate equipment (chillers, cooling towers) and remove one side without draining — common in plant rooms.

Actuation

For automated control, add an electric or pneumatic actuator. Modulating actuation (4–20mA) suits variable flow; on/off suits isolation. Specify torque and fail-safe position.

Reguvale HVAC Valves

Reguvale supplies wafer and lug butterfly valves for HVAC with ready stock. Send your chilled water spec for a quote.