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Different Classifications of Pneumatic On-Off Valves and Their Features

pneumatic valves

Pneumatic valves are powered by compressed air. They can control the flow of various liquid types namely corrosive medium, liquid metal, oil, radioactive medium, slurry, steam, and water. And they can be readily found in many applications.

Here are the different classifications of pneumatic on-off valves and their respective features.

Ball Valve

Ball valves are mostly suitable for open-close function. However, the modem types are more capable of throttling and controlling fluid. They are developed from the coak valve with the ball controlling the on and off status.

Features. Ball valves are easy to maintain, replace, or repair that have low fluid resistance as their resistance coefficiency is similar to the pipeline that is of the same length. In high pressures or temperatures, total sealing can be realised. They are more resistant to corrosion because of the total separation of the sealing surface and the ball of the valve seat in times when the valve is totally open or close.

Butterfly Valve

Such a type of valve consists of a disc that rotates on an axis across the pipe’s diameter to regulate the flow.

Features. With its simple structure and small footprint, it can be easily installed. Due to their minimal resistance to fluid, opening and closing hastily happens. Butterfly pneumatic valves can be used in transporting slurry and for large-sized valves. The only downside is that they have poor sealing performance.

Gate Valve

This type of valve has a valve plate that moves along with the channel axis in a vertical motion.

Features. Gate valves have small fluid, flush, and corrosion resistance from the medium to the sealing surface. They are simply structured, short-sized, and have good technology and wide application. With it, the pressure is not reduced, and the medium’s flow direction is not restricted. It is labour-saving, and the resistance doesn’t wear.

Membrane Valve

Inside the body of the membrane valve lies a flexible membrane. The movement of this membrane, be it upside or downside, controls the sealing.

Features. Materials inside this type of valve can vary that are widely applicable to different media. They can easily be dismantled and maintained. Membrane valves, however, can’t be used in environments with high temperatures. The medium is clean since the mechanism works separately from the medium channel.

Stop Valve

Stop valves are ideal devices for regulating and cutting medium given that when they are opened, the sealing surfaces of the valve clack and the valve seat do not contact with each other. Such valves’ closing part moves along with the valve seat’s centre line.

Features. Having a better wearing resistance, stop valves have footprints and one sealing surface for easy maintenance. They are largely resistant to liquids.

If you want to learn more about pneumatic valves, contact Mastermc2000.com.au.

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