When it comes to choosing a ball valve for your plant, there are several options. Regardless of the type you select, a van bi điều khiển khí nén offers you an array of benefits for your application.
Pneumatic control ball valves are designed for low to high-cycle applications that require a failsafe in the event of compressed air or power loss. They also have a compact design that reduces installation costs and downtime.
Design
A van bi điều khiển khí nén consists of a cylinder and pistons that transform compressed air energy into mechanical motion to turn the valve. There are also a number of options for actuation, including hydraulic, electrical and manual.
The first key factor to consider when choosing a pneumatic control valve is the type of actuator that will drive it. Pneumatic actuation uses pressurized air to power the spool and poppet while electric actuation motorizes the valve through an electric signal or lever.
Another important consideration is flow capacity. If your system cannot accommodate a particular size valve, you will experience inefficiencies in your operation.
In addition to port size, the other key criteria to consider in pneumatic control valve selection include operating pressure, the medium that the valve is rated to handle, flow capacity and cycle rate. These factors are critical to a successful installation and can help you determine the ideal valve for your application.
Operation
Pneumatic control ball valves are used in many industrial applications. They are compact, easy to operate and maintain. They are also suitable for a wide range of media, including water, solvent, acid and natural gas.
They are safer to use than electromotive actuators, which require NEMA/ATEX certification. They are non-flammable and do not generate sparks or burn when overloading.
A pneumatic actuator operates based on compressed air and a small rotation torque. This enables the air source to drive the ball core 0-90 degrees, which adjusts the flow of the medium.
The actuation can be done manually, by using a spring or a mechanical actuator or by an electric signal. In either case, the valve will revert to its initial position after the actuation.
Maintenance
A pneumatic control ball valve is a quarter-turn device that uses a spherical disk to open and close the flow of media. It is an effective way to control the flow of a liquid or gas.
The valve’s durability can be enhanced by proper maintenance. This helps extend the lifespan of the valve and reduces its need for replacements.
One of the easiest ways to ensure a ball valve lasts longer is to keep it clean. This can help prevent dust particles and debris from clogging the valve casing, which can cause it to leak or break down.
Regular cleaning can also help prevent corrosion and rust from building up on the casing. This can lead to a ball valve that is no longer safe to use.
Another aspect of pneumatic ball valve maintenance is to check the packing glands. This will ensure that there are no leaks in the gland nut or stuffing.
Replacement
When a pneumatic control ball valve becomes worn, it may need to be replaced. You can repair certain parts of the ball valve or order a complete replacement if needed.
To replace a handle on a screw-on type ball valve, shut off the fluid flow and firmly pluck it out of the valve. If the handle stays stuck, use a hammer to gently tap on it.
A quarter-turn ball valve is a simple type of valve that features a hollow spherical ball as its disk. To open the valve, the stem moves the spherical ball so that the hollow side is parallel to the media.
The stem can also be attached to a pneumatic or electric rotary actuator to spin the valve stem and open and close the ball valve automatically or remotely. Most electrical actuators include position indicators to provide feedback on the valve’s current position.
