As end users strive for increased heat transfer efficiency, customers are often tasked with building vessels that will withstand heavy use and the test of time. This often results in the use of more wear resistant tube sheet and tube materials, such as Inconel, Hastelloy, and Duplex Stainless Steel. While exotic materials often mean longer tube life, they can take a big toll on expander tool life.
From forklifts to land excavators, valves are used to regulate the flow of fluid through the machine, impacting the functionality of the machinery. For these large pieces of equipment to handle fine movements and adjustments, it’s important that the grooves and lands inside of the valve body are cut precisely.
Grooved tube sheets are the standard in most shell and tube heat exchanger applications. Providing both leak protection and improving the tube-to-tube sheet joints, grooves play an important role in prolonging the life of a tube and the efficiency of a vessel. However, in few applications where grooves are not required, there can be challenges during the tube expansion process.
Electric motors are used in a wide variety of applications, from lawn tools to automobiles. When looking at laminated motors, tight manufacturing tolerances are ideal for producing higher efficiency products. Roller burnishing can be used to set the air gap in lamination stacks and eliminate the need for grinding and honing.
Mechanical joining is a quick and easy process for creating leak free joints between tubular products and fittings, when compared to welding or brazing operations. This makes it well suited for high vibration and high-pressure applications like aerospace and heavy equipment.
With the amount of rolling motors on the market, there are a lot of variables to consider. However, one of the most common questions is around torque control, setting torque, and when it’s not needed for a job.
Surface finish plays a critical role in determining the performance and longevity of a part. However, it’s important to understand what materials can be burnished and how material impacts the finish that can be achieved.
While traditional finishing methods are effective, in many cases, these processes require multiple operations and set-ups to achieve the desired finish. Burnishing is an effective and efficient alternative that often eliminates the need for secondary processes entirely.
Tube patterns describe how the tube holes are distributed through a tube sheet. Manipulating tube patterns helps increase flow but these modifications can create challenges for tube expansion.
Dunn Heat Exchanger, Inc., a fabrication company located in Texas City, Texas, offers heat exchanger cleaning, decontamination, repair, and fabrication services in the highly competitive shell and tube market.
