TFC supplies sealing rings for diesel engines
A
TFC Europe product story
Edited by the Engineeringtalk editorial team
Jun 4, 2009
TFC Europe recently came to aid of a diesel engine manufacturer after it was required to supply engines with reduced emissions in line with the new Euro IV off-road emissions standards.
TFC's Smalley laminar sealing rings provided a tailored solution to this design challenge.
Traditionally, because of failures due to cracking, exhaust manifolds on large diesel engines need to be cast as two parts and connected via a sliding joint.
The dimensional tolerances of the engine assembly and thermal expansion caused by temperature made the use of rigid bolted joints with a gasket highly complex and more expensive.
Historically, machined cast-iron piston rings in the sliding manifold joint had been used to overcome the problem.
The rings worked well both at engine start-up and even after hundreds of hours because the old emission standards did not require the engines to run as hot.
Now the standards are more demanding and cast-iron rings are failing due to the increased engine and exhaust temperatures.
Smalley laminar sealing rings are produced in a variety of metals including A286 stainless steel, Inconel x-750, Elgiloy and 17-7 PH/C, among others, meaning they work extremely well in high-temperature environments.
The laminar sealing ring is a metallic labyrinth seal consisting of multiple rings in a groove.
The ability to provide laminar rings in materials able to withstand corrosive and high-temperature environments has enabled the laminar ring products to be used in a wide range of applications, including compensators in the exhaust pipe systems of internal combustion engines, exhaust gas recirculation systems and turbochargers.
TFC's Smalley laminar sealing rings are generally supplied in single or double turn form and the arrangement of the rings and the specific orientation of the rings are dictated by the application and the severity of the environment.
The flexibility of Smalley rings allows virtually any size of ring to be designed into an application without any tooling charges being incurred.
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Contact TFC Europe
Tel +44 1435 866011
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