Plug Valve or Ball Valve?

When selecting a valve for a demanding process application, the right valve design can make a significant difference to reliability, maintenance and product quality. Ball valves are widely used across industry, but for certain media and operating conditions, their design can present challenges. This is where the cavity-free AZ Plug Valve offers a different approach.

In certain ball valve designs, internal spaces can allow process media to become trapped. With corrosive media, this can affect the sealing surfaces. Polymerising or crystallising media can build up inside the valve, potentially causing clogging, abrasion and damage to sealing components. Residues can also remain trapped and contaminate the process medium.

The AZ Plug Valve is designed to eliminate these cavities. Its tapered plug is enclosed by a resistant PTFE sleeve, creating a completely cavity-free design. This protects the sealing surfaces and prevents process media from becoming trapped. Deposits are pushed away rather than stuck between the plug and sleeve, helping maintain reliable operation even with challenging media.

The AZ Plug Valve offers further advantages when handling highly corrosive, toxic, polymerising and crystallising media. Its adjustable plug and sealing system helps maintain reliable sealing performance throughout the valve’s service life. The self-lubricating PTFE sleeve also supports maintenance-free operation. The valves are designed to minimise emissions and maintain a constant operating torque regardless of differential pressure. They are also suitable for vacuum conditions.

The choice between a ball valve and an AZ Plug Valve ultimately depends on the application. Ball valves can be a suitable solution for many conventional applications. However, where highly corrosive, polymerising or crystallising media are involved, the cavity-free design of the AZ Plug Valve offers the best alternative.

By combining cavity-free technology, reliable sealing and resistant materials, AZ Plug Valves are engineered to protect the process, reduce maintenance requirements and support reliable long-term operation in demanding industrial applications.

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