Our company's D641W pneumatic ventilation butterfly valves are widely used in ventilation and dust removal systems, serving as flow control and shutoff devices for dust-containing gases, gas pipelines, ventilation purification equipment, and flue gas pipelines. These valves are constructed from wear-resistant materials, offering excellent wear resistance, stable and reliable operation, ease of operation, sensitive action, low leakage rate, long service life, and convenient installation and maintenance. The 641W pneumatic ventilation butterfly valves are particularly suitable for low-pressure differential, large-diameter, and high-flow applications. They can be combined with various actuators to create valves with different performance characteristics. When paired with an electric valve positioner, the valves can be controlled by inputting a 4-20mADC signal and a 0.4-0.7MPa air source, allowing for the adjustment of parameters such as pressure, flow, temperature, and liquid level. Alternatively, with a stroke limit switch, solenoid valve, pressure reducer, and a 0.4-0.7MPa air source, they can be used for on/off operations and send out two pairs of passive contact signals to indicate the valve's state. The pneumatic ventilation butterfly valves are mainly used for ventilation regulation of medium flow in industrial, metallurgical, and environmental protection pipelines. Their main features are as follows:
(1) Innovative, rational design with simple structure, lightweight, and quick opening and closing.
(2) Low torque operation, easy to handle, and labor-saving with agility.
(3) Utilize materials suitable for varying temperatures and corrosive mediums across low, medium, and high-temperature applications.

Pneumatic Ventilation Butterfly Valve - Design Standard

Pneumatic Air Vent Damper Actuator Parameters

Utilizing a new series of pneumatic actuators, featuring double-acting and single-acting (spring return) types, gear rack transmission, ensuring safety and reliability; large-diameter valves are equipped with the series AW type pneumatic actuators featuring toggle linkage, offering rational design and high output torque, available in both double-acting and single-acting versions.
1. Gear-type double piston, high output torque, compact size.
2. Cylinder made of aluminum alloy, lightweight and aesthetically pleasing.
3. Manual operation mechanisms can be installed at the top and bottom.
4. Ratchet-type connection for adjustable opening angle and rated flow.
5. Actuators are available with optional feedback signals and various accessories for automated operation.
6. The IS05211 standard connection facilitates the installation and replacement of the product.
7. The adjustable set screws at both ends allow the standard product to have a ±4° adjustable range at 0° and 90°, ensuring synchronization accuracy with the valve.

Pneumatic Ventilation Butterfly Valve - Parts Material

Pneumatic Ventilation Butterfly Valve - Performance Specifications

Pneumatic Ventilation Butterfly Valve - Connection Size Diagram

D641W Pneumatic Ventilation Butterfly Valve (Cut-off Type)	D641W Pneumatic Ventilation Control Butterfly Valve (Regulating Type)

Pneumatic Air Vent Butterfly Valve - Connection Dimensions

Pneumatic Ventilation Butterfly Valve - Product Selection

(1) Valve Body Parameters: Nominal Bore Size, Working Pressure, Process Medium, Application, Valve Body Material, and other series parameters.
(2) Actuator Parameters: Actuator Type, Control Method, Control Signal (4-20mA, 1-5V), Operating Mode (Air-Open, Air-Close)
Please provide as detailed technical specifications as possible, to facilitate our production and technical team in accurately selecting the right products for you. Should you have any questions, feel free to call us, and we will do our utmost to provide excellent service!

Related Names: Pneumatic Ventilation Butterfly Valve, D641W Pneumatic Ventilation Control Butterfly Valve, Pneumatic Dust-Gas Butterfly Valve