Increased emission restrictions are requiring engine manufacturers to conform to Euro 6 and Tier IV regulations to reduce exhaust leakage 80% or more. In order to achieve these new standards, engines with extreme temperatures coupled with a high amount of vibrational movement, need to have highly engineered sealing solutions. Applications with predetermined mating components cannot always be changed, so the need for a sealing solution with a similar coefficient of thermal expansion is needed.
Most heavy duty diesel engines can reach exhaust gas temperatures upwards of 1292°F(700°C) while subjected to constant vibrations. These engine vibrations can cause havoc when a seal needs to be maintained on the exhaust line. Vibrations from the engine cause rotation, cavity offsets, pivoting, and reciprocation which become difficult to seal against. Movement, pressure cycling and thermal cycling require an engineered solution to maintain a seal under extreme application conditions. With the use of custom engineering and advanced analysis techniques, Parker is able to create custom solutions for our customers’ most difficult applications.
Parker’s Air Duct Seals for Heavy Duty Engines are a single piece, easy to install metal design, providing lower leak rates than traditional labyrinth piston ring seals.
The continuous single-piece metal seal design is enhanced with the use of TriCom-HT™, Parker’s proprietary high-temperature, anti-wear coating. TriCom-HT™ provides superior wear resistance, protecting the Air Duct Seal from the detrimental effects of engine vibration and thermal cycling, resulting in 80% less leakage and extended seal life.
Our Air Duct Seal design fits tightly into the mating hardware, greatly reducing leak paths. Machined grooves are not required in the mating hardware, thereby lowering your manufacturing cost.
Parker has been able to incorporate its design experience and knowledge of metal sealing technology and material science technology to create this solution. The Parker Air Duct Seal was designed with cost savings in mind and the patented design allows for value added one-piece out of the box installation, virtually eliminating complex sealing needs. Installation of the Air Duct Seal is simple, and requires only a press fit for both sides of the seal. Some key benefits are:
For more information on this technology, available sizes or additional questions, please contact our applications engineering team at Composite Sealing Systems Advanced Products Business Unit at 203 239 3341.
This article was contributed by Vivek Sarasam, heavy duty mobile senior applications engineer, Engineered Materials Group.
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