Complete Air Shutoff for Round Duct Systems
The circular sealing valve is designed to completely block airflow in round ducts when closed. Like its rectangular counterpart, it creates a tight seal between the blade and valve body, as well as between the valve and the duct connection. When airflow or smoke must be stopped, the product ensures minimal leakage under pressure. This makes it the ideal choice for positive isolation in round ductwork.
Strong Build with Reliable Sealing Components
Several features enable the circular sealing valve to perform reliably. The actuator must provide sufficient power to press the blade tightly shut against air pressure. Seal material is critical-typically high-temperature rubber or silicone gaskets around the blade edge. For fire-rated applications, these seals must withstand extreme heat without failure. The valve body and blade must be stiff enough to resist bending under pressure, maintaining an effective seal. Our product uses quality materials and robust construction for long-term, dependable shutoff.
|
Feature |
Description |
|
Shape |
Circular / Round |
|
Seal Type |
Blade-edge gasket (rubber or silicone) |
|
Body Material |
Galvanized steel / Stainless steel optional |
|
Blade Material |
Galvanized steel / Stainless steel optional |
|
Actuator |
Electric or manual, sized for tight closure |
|
Leakage Rate |
Very low (meets tightness class requirements) |
|
Temp Range |
Standard or high-temp seal options available |
|
Installation |
In round ductwork |
The circular sealing valve is used wherever you need positive shutoff in round ducts. Common applications include isolating sections of ventilation systems for maintenance, creating smoke barriers in fire zones, and controlling airflow to sensitive equipment. It's also used in industrial process ducts where backflow prevention is critical. Choose our product when you need a round duct damper that truly seals tight.
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