Nominal Diameter: DN50mm ~ DN500mm (2" ~ 20")

Nominal Pressure: PN1.0~2.5MPa (150~300Lb)

Operating Temperature: ≤ 200℃

Material: Carbon steel, stainless steel, etc.

Medium: Lithium powder, dry ash, coal powder, chemical processing powder, etc.

Widespread Applications: Pipeline systems for new energy, electricity, oil, chemicals, and pneumatic conveyance.

‌Pneumatic dome valves are commonly used control valves that operate using air pressure or gas as power. They control the opening and adjustment of fluids, gases, and other media by lifting and rotating the valve disk. They are widely used in pipelines in coal chemical, petrochemical, rubber, papermaking, and other industries as devices for分流合流 or changing flow direction.‌

Structure and Working Principle

The pneumatic dome valve is mainly composed of key components such as the valve body, valve cover, valve plate (dome), pneumatic actuator, and seals. The valve body is the main part of the valve, responsible for containing the medium and supporting other components; the valve cover is used to seal the valve body and form a seal with the valve plate; the valve plate (dome) is the core component of the valve, controlling the flow of the medium through its lifting and rotation; the pneumatic actuator receives control signals to drive the movement of the valve plate; and the seals ensure the sealing performance of the valve when closed.

Upon receiving a control signal, the pneumatic actuator transmits compressed air to the dome of the valve via a motion transmission device, causing the dome to move downward and open the valve. When the compressed air in the air source is disconnected, the motion transmission device stops transmitting compressed air, and the dome is moved upward by the spring force of the valve itself, closing the valve. In this manner, the pneumatic dome valve can control the flow of the medium.

Features and Advantages

‌Good sealing performance: The pneumatic dome valve features a dome-shaped valve plate that tightly conforms to the inner wall of the pipeline, achieving excellent sealing and effectively preventing material leakage._

High wear resistance: The valve plate and seals are made of wear-resistant materials, allowing for long-term use in harsh conditions, thereby reducing the frequency of maintenance and replacement.

High-temperature and pressure resistance: Capable of handling high-temperature and high-pressure material conveyance, with strong adaptability.

Automation Control: Connects with automation control systems for remote control and monitoring, enhancing production efficiency and safety.

Easy Maintenance: Simple structure, easy disassembly, and convenient for daily maintenance and upkeep.

Application Fields

Pneumatic dome valves are widely used in the following fields:

New Energy: Controls the flow of various media, ensuring stable operation of the system.

Food Processing: Used for controlling the flow of powdery, granular materials, etc., due to its excellent sealing performance and easy-clean characteristics, ensuring product hygiene and quality.

Pneumatic Conveying System: A critical component in the pneumatic conveying system, it is used to cut off or seal the flow of material, ensuring the filling rate of the pressure tank without relying on the material level indicator of the conveying tank.

‌Mining: Used for conveying coal, ore, and other solid materials.‌