Internal heating coil

Even though an internal heating coil or serpentine heating element may not strictly fit in the category of a double-walled boiler, it usually shares the same ultimate goal of controlling or regulating the temperature of the internal process.

Since pressure vessels are often used as process vessels fitted with agitators and the like, a heating coil obviously has the big disadvantage of getting in the way of the agitator's rotation and is less used as a result.

However, as shown by the pictures, Deprest is also able to manufacture these products.