Engineered Materials Group
Composite Sealing Systems ("CSS") Division
Case Study
Parker solution improves sealing of engine gas exhaust manifold coupling joint, resulting in 80% reduction of leakage over traditional laminar ring seals
Application
Heavy duty diesel engine exhaust gas can reach temperatures upwards of 675°C (1247°F) while being subjected to constant extreme vibrations. With such harsh conditions, proper sealing is no
easy task. By using custom engineering and advanced analysis techniques, Parker was able to create a custom solution the delivers improved sealing for EGR and exhaust manifold coupling joints.
FEATURED PRODUCT: Air Duct Seal
Challenge
Due to extreme temperatures coupled with a high amount of vibrational movement, the customer was unable to obtain desired sealing results.
Our design team was tasked with engineering a solution that would meet the following criteria:
- Reduce exhaust gas leakage of 80% to enable compliance with emissions regulations
- Only minimal changes to mating hardware are allowed
- Ensure thermal expansion compatibility with mating hardware across a wide temperature range
- Simplify installation
- Ten year service life
Heavy duty engine exhaust gas manifold
Parker Solution
Parker Composite Sealing Systems Division developed a one-piece air duct seal to solve the issues the OEM was having with the incumbent high-leakage laminar piston rings and high-cost bellows expansion joints.
Illustration of multiple-piece laminar seal rings vs. single-piece Parker solution
Features and benefits of the solution designed by Parker included:
- Easy to install one piece hourglass design allows the seal to fit tightly into the mating hardware greatly reducing leak paths
- TriCom-HT™ coating for superior wear resistance of seal and mating hardware caused by heat and harsh engine vibration
- Savings to manufacturing costs by eliminating need for machining grooves in mating hardware
- Long service life
One-piece hourglass design
Contact
Parker Hannifin
Composite Sealing Systems Division
7664 Panasonic Way
San Diego, CA 92154
(619) 661-7000
www.parker.com/css
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