There are various types of sealed damperss, each with its unique characteristics and application scenarios. The following is a summary of the main types of sealed damperss:
Split type closed multi leaf regulating valve:
Features: It can be divided into two types: manual and electric. It adopts a split blade design, and the airflow is relatively uniform. The edge of the blade is embedded with a sealing strip, which has good tightness, low resistance, and low air leakage when closed.
Application: It is commonly installed on main and branch air ducts to regulate the flow rate of airflow.
Fire damper:
Features: The valve is normally open. When the temperature of the airflow passing through the valve reaches the set value (such as 70 ℃ or 280 ℃), the valve will automatically close to prevent the spread of fire.
Application: Mainly used in ventilation and smoke exhaust systems to ensure rapid cut-off of airflow in the event of a fire, ensuring personnel safety.
Smoke exhaust fire damper:
Features: The valve is normally open and can be remotely controlled from the center. When the temperature reaches 280 ℃, the valve will automatically close.
Application: Used in smoke exhaust systems to ensure rapid smoke evacuation in the event of a fire, while preventing the spread of fire through smoke exhaust ducts.
Butterfly valve:
Features: Simple structure, easy operation, playing the role of opening, closing or adjusting air volume. But the opening resistance is high for the blade regulating valve.
Application: It is generally installed on the branch air duct of the precision computer room air conditioner.
Three way regulating valve:
Features: Mainly used for rectangular straight through three-way pipes or pants fork pipes, adjustable air volume of branch pipes.
Application: Suitable for situations where multiple duct air volumes need to be adjusted.
Sealed type air valve (such as FLF type):
Features: Made with all aluminum alloy die casting, it has a beautiful appearance and is durable. The blades, upper and lower frames, and left and right side plates are made of high-quality aluminum alloy drawn, with low leakage rate and excellent pressure resistance.
Application: Suitable for occasions with high requirements for airtightness and appearance.
Manual sealed valve and dual-purpose manual/electric sealed valve:
Features: Manual sealed valves are mainly composed of a housing, valve plate, and driving device; The dual-purpose closed valve with both manual and electric functions has added an electric device to achieve both electric and manual operation.
Application: Used in situations where it is necessary to ensure pipeline sealing and switch ventilation methods, such as civil air defense engineering.
When selecting a sealed dampers, it is necessary to comprehensively consider factors such as specific application scenarios, system requirements, medium characteristics, and operational requirements to ensure that the selected air valve can meet the operational requirements of the system and ensure personnel safety.