QD Series Volume Control Damper Manufacturer

QD Series Volume Control Damper

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Volume control damper is installed in ductworks of air conditioning ventilation systems. It can regulate the air volume in the duct by the changing angles of its blades. It also can be used for regulating the fresh air and return air. Its valve is made of iron sheet, galvanized sheet, aluminum alloy sheet, or stainless steel sheet. As a professional air movement equipment manufacturer who has more than a decade of experience, Quanda provides custom-made volume control damper to meet your special requirements.

QD-WSF Manual Air Control Damper

Features
1. The frame of the volume control damper is fixed together by riveting instead of welding so as to improve its corrosion resistance.
2. The volume control damper is installed in ductworks of air conditioning ventilation systems. It can control the air volume in the duct by the changing the angles of its blades.
3. This single or multi-leaf volume control dampers is opened manually. It can be install in the rectangular duct or square duct.
4. The turbine locks the blades in a natural state. The angles of blades can be modified freely.
QD-DF Electric Air Control Damper

Features
1. The electric air control damper is controlled by a switcher to open and close.
2. It can output open and closed signal. There is no power consumption in its normal state.
3. It can be adjusted from 0-90°. The can be opened counterclockwise.
4. The electric air control damper can use DC 24V or AC 220 power supply.
QD-SF Manual Air Control Damper

Features
1. The frame of this manual air control damper is put together via riveting instead of welding, therefore improving the corrosion resistance.
2. The air control damper is installed in air conditioning ventilation ductwork. It controls duct air volume by changing the blade angle.
3. The single or multi-leaf air control dampers are manually opened. It can be installed in both rectangular ducts and square ducts.
4. It uses a handle to drive linkage for blade angle modification in order to control the air volume.
QD-YSF Round Air Control Damper

Features
1. This round air control damper can be manually opened or closed.
2. It regulates the airflow from 0to 90° in five stages.
QD-BFL Air Control Damper

Features
1. This air control damper is composed of a cabinet and control system, with the cabinet consisting of the shell, damper, wind speed sensor, electric control box, rubber and plastic insulation parts, and heating components (optional).
2. The control system consists of a digital controller, actuator, temperature controller, heater, and other accessory components. It also features a digital network, client and communication adapter.
3. All parts of the air control damper are chosen by customers according to their requirements.
QD-ZH Non-Return Damper

Features
1. The non-return damper is installed in air conditioning and ventilation system ducts.
2. When the system is operating, the blades remain open when air flows. When the system shuts down, the blades close to prevent reverse airflow.
QD-LHJF Aluminum Manual Air Control Damper

Features
1. The air control damper is made of a high strength aluminum alloy with surface anodizing.
2. There are seals between the blades and frame.
3. The manual air control damper regulates airflow from 0 to 90° in six stages. The blades on the electric air control damper stop at any angle.
4. The VD-LM1 type features a gear rotation hidden in the frame to avoid damage caused by dust accumulation.
5. The VD-LM2 type uses a connecting rod rotation and is equipped with a connecting rod cover to prevent damage caused by dust accumulation.
QD-SF Air Control Damper

Features
1. The air control damper features a small size, aesthetically pleasing appearance, and is easy to install.
2. It uses a switch for a quick, easy control while the actuator features a short stroke that will automatically cut power at the end of the stroke.
3. There is no power consumption in its normal state.
4. The air control damper is widely used for controlling valve opening and closing in HVAC systems, lab ventilation systems, purified ventilation systems and more. It is also used in pressure control systems and flow control systems in industrial and mining applications.
QD-ZF Combination Air Damper

Features
1. The combination air damper is installed in ventilation system ducts to regulate air volume in the duct by changing the blade angle. It is also used for regulating fresh and return air.
2. The combination air damper consists of a bottom frame, serval single air valves, actuator and transmission mechanism. The actuator drives the blades for a reciprocating movement from 0°-90° through a linkage to control the air flow.

Specifications

The state of blades: opening in opposite direction, opening in same direction
Time of stroke: ≤ 30s(60s)
Operating Voltage: 220V, AC+10%/-15%, 50Hz
Driving method: electric, automatic