A bubble valve, commonly referred to as a bubble tight damper, works on the principle of creating an airtight seal within a system to prevent the passage of air or gas. Here’s how it works: Open Position: When the system is running and flow is needed, the damper is in an open position. The damper blades, attached to a rotating shaft, are parallel to the flow, allowing the air or gas to pass through the ductwork. Closed Position: When the damper needs to stop the flow, an actuator (which could be manual, pneumatic, or electric) rotates the damper’s blades to a closed position, perpendicular to the flow. The edges of the blades press against a silicone rubber seal. Bubble Tight Seal: The damper’s blades and the silicone seal create an extremely tight, bubble-tight seal. The seal is so tight that it can hold against a specific pressure without allowing any air or gas to leak out, effectively achieving zero leakage. It’s this ability to provide a perfect seal, even under pressure, that gives the bubble tight damper its name and makes it a preferred choice for applications requiring high-integrity isolation.