Useful Information Regarding Jacketed Valves

By Matthew Patterson


The term jacket refers to insulators that are used for covering processing components. These components vary a lot and they include filters, pumps, valves, pipes, and accessories. The main purpose that jackets are used to serve is to provide thermal insulation. The cover is wrapped around the item by joining hooks firmly together using ropes. This setup is to be maintained as long as the item is in use.

There exists a broad spectrum of products that are thermally jacketed, which are in use in various industries. Both organic and inorganic chemical processors, pharmaceutical plants, and food processors just to mention but a few are some of the industries that utilize jacketed valves. Standard, hybrid and swaged systems are the three broad categories in which jackets are placed.

Standard jacketing is one of the most commonly used jacketing systems. It is preferred because it allows for uniform application of heat by covering valves and pipes from the flange. The pipe or valve is usually referred to as the core. The flange is usually welded with the jacket. That means that oversize valves need to be used in order for them to accommodate bolts.

Swaged jacketing is not in common use. It is only used in special cases. For instance, it finds use in cases where cross-contamination needs to be prevented. One condition of using swaged jacketing systems is that temperature discontinuities at the flanges must be able to be tolerated. Usually, swaged jacketing are cheaper in comparison to standard jacketing. The reason for this is that small in-line flanges can be used with swaged jacketing to form what is called partial or capped jacketing.

Just as indicated by the name, hybrid jacketing combines swaged and standard jacketing systems. Furthermore, it additionally utilizes removal and special jacketing. Swaged jacketing may be used in straight line piping. On the flip side, standard or removable jacketing may be used on valves and fittings in order to protect vital flow areas from temperature discontinuities.

With technological improvements, one can jacket all types of valves without having any issue. Various fabric methods can be used for partial or full jacketing. In the method of standard fabrication, one can modify the valves for them to accommodate oversize flanges. Jacketing is done after the modification. One should maintain the interior tolerances of the valves after they have added jackets just as they were before they were jacketed.

There are many reasons that make it necessary to place a jacket around a valve. These reasons are also the advantages of jacketing. First, jacketing makes it possible to maintain processing temperatures within close tolerances. Secondly, high rates of heat transfer are achieved from the heating medium to the process. Lastly, it is possible to do unit construction with jacketing.

On top of it all, there are a number of demerits associated with jacketing. To begin with, there is limited jacketed components selection and significantly untimely component deliveries. Furthermore, there are no fabrication standards maintained in this industry. This has resulted in significant discrepancies in the components made and products.




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