A Guide To Master Pneumatic Axial Valves

What is Pneumatic Axial Valve

A Pneumatic Axial Valve, also known as an axial flow control valve or axial control valve, is a flow-control valve that regulates the flow of compressed air or other media in a straight axial direction. Unlike traditional valves that operate through rotary or linear movement along the flow axis. This movement is driven by a pneumatic actuator , making it particularly suitable for high-speed, high-pressure systems and installations with limited space.

The Composition Structure and Working  Principle of  Axial Valve

Introduce

The working principle of Pneumatic Axial Valve can be simply summarized as using cylinder compressed air as the power source. Generate linear thrust on the piston of the cylinder, and then the piston rod outside the cylinder directly pushes or pulls the spool of the Axial Valve. The valve core moves axially to open or close the fluid channel. Due to being in the direction of fluid flow, it is highly suitable for high-pressure, high-speed media and compact assembly environments.

Structure

By understanding the structure and function of each component that makes up the valve, one can have a deeper understanding of the entire workflow of the valve. Mainly by utilizing the thrust of the piston rod, the valve core is pushed to move in the direction of the fluid, achieving the function of controlling the fluid.

Valve body: The component where the fluid channel is located, usually a straight through structure

Valve core: the core component that controls the passage of fluid and moves in a straight line

Sealing component: Ensure no leakage when closed

Pneumatic actuator: converts compressed air energy into linear mechanical action

Piston rod: connects the actuator and valve core to transmit thrust

Spring: used for resetting, commonly used in single acting structures

Guide sleeve and packing box: ensuring the smoothness and sealing of the piston rod's linear motion

Working Process Detail

The specific workflow of Pneumatic Axial Valve includes two processes: opening and closing. The movement and retraction of the valve core rely on the piston movement of the cylinder:

Initial state:

The pneumatic cylinder has not yet been filled with air.

If it is a single acting structure cylinder, the internal spring keeps the valve in a default state.

Open process:

Supply air to the actuator cylinder:

Control the system to turn on the air source. Compressed air enters one side of the actuator chamber.

Piston motion:

The air pressure pushes the piston to move inside the cylinder, and the piston drives the piston rod outside the cylinder to move forward, transmitting the force to the connected valve core.

Valve core opening:

The valve core, pushed by the piston rod, moves axially along the direction of fluid flow and leaves the valve seat. At this point, the valve opens and the fluid can flow smoothly along the channel.

Closing process:

Gas source switching or exhaust:

In a double acting cylinder, it is necessary to switch the direction of control air pressure or directly disconnect the air source

Reset action:

In the double acting cylinder structure, reverse air pressure pushes the piston back to its original position; In a single acting cylinder structure, the spring force automatically returns the piston and drives the valve core back to the closed position.

Reset the valve core to the valve seat and seal it off:

The valve core presses the valve seat tightly, completely cutting off the fluid channel.

Pneumatic Axial Valve Characteristics

Pneumatic Axial Valve has the following significant characteristics compared to other general valve types:

Direct flow channel: Fluid flows in a straight line along the axial direction, reducing pressure loss.

Quick response: Compared with ordinary pneumatic globe valves, Axial Valve is pneumatically driven, with fast opening and closing speed, suitable for frequent operating conditions.

High sealing performance: Using high-quality sealing components to ensure no leakage when closed.

Compact structure: Axial Valve has a simple overall design, takes up less space, and is easy to install.

Low flow resistance: Due to its straight through design, the Pneumatic Axial Valve has less resistance to the internal flow medium compared to ordinary pneumatic ball valves, making it very suitable for high-frequency switch applications.

Pneumatic Axial Valve, with its unique design and features, can be applied to the following industries:

Oil and gas: Used for pipelines that require rapid opening and closing control.

Chemical industry: Control the flow of corrosive or high viscosity media.

Electric power industry: used for flow regulation of media such as steam and water.

Food and medicine: Control liquid flow in environments with high hygiene requirements.

Automated production line: achieving automatic control and management of fluid systems.

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