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Important Facts About Jacketed Valves

By Jessica Morgan


Several components working together for a specific aim make up a process system. There are several components that make up a typical system in production, including valves, stainless steel tanks, pumps and vessels. Stainless steel pipes are used to join the various components. Usually, during production, there is a lot of temperature change that happens in the product stream. As the products flow through various components the change in temperature occurs.

The effect of the changes in temperature is thermal damage or rapid rises in viscosity. Other effects include possible solidification and partial crystallization. The use of jackets on the piping and valves can go a long way in minimizing or avoiding the problems mentioned above completely. Jacketing involves fitting another tube over the piping so as to allow a fluid to pass through the outer tube. The same is also done on valves to make jacketed valves.

Heat is transferred to or from the product as the fluid passes the through the tube. For this reason, the fluid plays the role of keeping the temperatures stable. Jacketing is commonly used in the confectionery industry. It is commonly practiced in the food industry in general including the dairy and breakfast industry.

The process is commonly done using materials that are made of stainless steel. On the other hand, other materials can also be used especially in process that entail high temperatures. For example in the manufacture of sauces, certain syrups and salty mixtures, other materials may be used. Such process usually use specialty alloys since the material used should have a higher resistance to corrosion.

Valves used in a production line in a factory need special treatment because of the role they play. For instance, valves are susceptible to damage by elevated temperatures. Thus, they are protected using jackets in the same way that piping is protected. The importance of protecting valves is that if it fails, the affected production line shuts down. This can cost the company a lot of time and money because production can only continue after the broken valve has been replaced or repaired.

Acquisition of valves is very costly hence their protection is of much importance. Jacketing costs are much lower in comparison to acquisition of new valves or repair. In reflection to replacement and repair costs, most companies would prefer to protect their valves than let them fail and repair or protect them later.

Currently there are various configurations of jackets in the market. There are certain jackets that can be placed around the valve. Such jackets can readily be removed when need arises. One of the most common removable jacketing is the bolt-on jacketing. A two-piece aluminum casting is used to make a bolt-on jacketing.

Bolton jacketing and other forms of jacketing can be adjusted in size to suit various valve sizes. Shapes can be customized to fit the various models of valve as well. They have heat transfer mastic with a thin layer used to transfer heat in any direction. They consist of inlets and outlets which act as mediums for heat transfer. Mediums of heat transfer use glycol, vapor, water, steam, and hot oil.




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