in the technology center
Our calculation tools in the technology center
Assembly force tool & efficiency analysis
Assembly force tool
Which advantages could a tool that can check a sealing connection using just the design parameters and diameter of the seal bring?
This advantage is priceless when you have to work under time pressure, for example when performing a large revision or when working during a period of downtime. We have identified our customers’ needs and have created a tool that can make their life easier. Simply select the type of seal and the screw material and enter the internal pressure and temperature that you want to cover. Finally, you can set the outer diameter of the seal that you have or that you are still looking for and our tool then uses the predefined settings to do the rest.
Afterwards, you can adjust other details such as the inner diameter of the seal, the screw shape, thread shape, screw size and number of screws. The tool then calculates the values for the minimum required and maximum permissible assembly force and the tightening torque resulting from the given friction value. The expected seal surface pressure will also be displayed.
This means that feasible and reliable assembly parameters can be generated in just a few seconds.
But ATTENTION: This calculation relates to the projected seal width, not to a possibly effective seal width! The tightness of the flanges is also not checked. As usually no entry of data relating to the flanges is required, this rough calculation cannot replace an exact flange calculation according to DIN EN 1591-1.
Efficiency analysis for heat exchangers
Pipe bundle heat exchangers are used to transfer thermal energy from a hot to a cooler medium. The first medium flows through a cylinder barrel and the second through the pipes of the pipe bundle. During this process, the hotter medium is cooled while the cooler medium is heated.
As a general rule, heat exchangers with pipe bundles have redirecting segments to guide the media flow within the cylindrical barrel. They then guide the medium around the inner pipes of the pipe bundle.
However, between the inner diameter of the cylindrical barrel and the outer diameter of the redirecting segments, there is a circular gap. Through this gap, a part of the medium flows through as a leakage flow alongside the heat exchanger which makes the thermal energy transfer less efficient. The same goes for the rectangular gap between the longitudinal dividing sheet and the inner diameter of the cylindrical barrel. These systemic gaps are essential for a trouble-free assembly and dismantling of the pipe bundle and they vary depending on the size and design of the cylindrical barrel.
How significant is the reduction in efficiency caused by the gaps? The gap between the interior diameter of the cylinder and the longitudinal dividing sheet in particular can cause considerable problems. This is exactly why we have developed a tool for our customers that can be used in the planning phase to check to see whether the expected performance can actually be achieved. Using the calculation parameters that have been entered, the tool immediately shows how a dividing sheet seal can be used to seal the gap and to what extent it can improve the efficiency of the heat exchanger.