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How Bubble Tight Dampers Works?

Dampers are mechanical devices typically introduced into fluid flow systems to regulate or stop the flow completely. They are designed to perform various functions, such as controlling the volume of fluid, determining the direction, or shutting off or isolating the flow in specific situations. These versatile devices ensure effective management of fluid systems.

Types of Dampers

Dampers are essential components in various systems, regulating airflow and maintaining proper environmental conditions. Here’s an overview of different types of dampers:

Bubble Tight Damper

Bubble Tight Dampers are designed to provide an airtight seal, preventing any leakage. These dampers are crucial in applications where maintaining a completely sealed environment is essential, such as in clean rooms or hazardous material containment. They ensure that no air or gas escapes, which is vital for maintaining safety and efficiency.

bubble tight damper


Bubbler Tight Isolation Damper

Bubbler Tight Isolation Dampers are similar to Bubble Tight Dampers but are specifically used for isolating sections within a system. These dampers are critical in industries requiring strict isolation to prevent cross-contamination or to maintain different pressure zones. They provide reliable and effective separation, ensuring operational safety and integrity.

Low Leakage Control Dampers

Low Leakage Control Dampers are designed to minimize air leakage, thereby enhancing energy efficiency and environmental control. These dampers are used in HVAC systems and other applications where precise airflow regulation is necessary. They help in reducing energy costs and maintaining optimal conditions by ensuring that very little air escapes through the damper.

HVAC Dampers

HVAC Dampers are integral to heating, ventilation, and air conditioning systems. They control the flow of air within ductwork, allowing for efficient temperature regulation and air distribution throughout a building. HVAC dampers can be adjusted manually or automatically, and they play a vital role in maintaining indoor comfort and air quality.

Each type of damper serves a specific purpose, contributing to the overall efficiency, safety, and functionality of various systems. Read more.

What Does Bubble Tight Mean?

This is a phrase that is indicative of the sealing ability of any valve or control device. When these valves or dampers are pressure tested with high air pressure, the leakage that gets past the seals provided by its closing devices, plates or discs, is collected and allowed to bubble through the water. A damper that is bublle tight will not show any air bubbles during testing.

EB Air Bubble Tight Dampers (BTD)

Bubble tight isolation dampers are used in building isolation systems for room isolation, in containment housings, dust collectors, and HVAC systems. They can be introduced in both square and round ducts and can be designed to operate in temperatures ranging from -50 to 375 degrees Fahrenheit.

A bubble tight damper is one that has the lowest possible leakage ratio, which has to be zero leakage damper. The blade or disc must be designed for the rated pressure and will have silicone rubber seals that eliminate any fluid leakage around its periphery in the closed position.

The Working of Bubble Tight Dampers

Dampers can operate manually, or through pneumatic or electrical controls. These dampers work on the rotating disc principle, where the disc is controlled through an actuator that is located outside of the fluid flow stream, so it is not distorted in any way during operations.

This requires a jackshaft to penetrate the housing, which requires seals to maintain the integrity of the damper. These seals are positioned so they can be serviced from outside the housing of the damper.

The seal around the blade or disc will firmly sit against the gasket made from silicon or neoprene and covers the frame of the opening that permits fluid flow. This ensures that there is no metal to metal contact between the disc gasket or the frame.


Bubble tight isolation dampers are used as shut off devices in industrial applications, like process applications, wastewater treatment plants, mining ventilation, and laboratories, etc.

EB Air Control Inc. manufactures these HVAC products, which have the design and technology required to ensure the proper handling of projects requiring the highest quality and performance.

They serve pharmaceutical, health care, manufacturing, power plants, water treatment plants, and food industries besides many other buildings. Inquire today for a bubble tight dampers cost estimate.

ebair_wpHow Bubble Tight Dampers Works?

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