In this Fluid Power Forum episode, host Eric Lanke interviews Trevor Combs, global technical manager for off-highway at Trelleborg Sealing Solutions, about preventing external hydraulic leakage in linear rod applications using a system-level approach emphasized in NFPA's whitepaper "Preventing Leaks in Fluid Power Systems."
Combs explains how leakage is driven by interactions among the counter surface (rod substrate, coating, and surface finish), the hydraulic fluid (viscosity index, temperature range, cleanliness/contamination control, lubrication), and the seal system (geometry, materials, and multiple components like primary/secondary seals, wear rings, and wipers). He discusses balancing lubrication film versus leak prevention across extension and retraction strokes, key variables such as pressure, speed, duty cycle, and surface roughness beyond Ra, and innovations including back-pumping seals, pressure-relief buffer seals with integrated check valves, and venting wipers.
Future focus areas include surface treatments, moving away from chrome, PFAS-free materials, compatibility with sustainable fluids, and predictive maintenance using customer data.
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Read the full whitepaper at the NFPA Technology Reports website.
Connect with our host, Eric Lanke, at elanke@nfpa.com.
Connect with our guest, Trevor Combs, at trevor.combs@trelleborg.com.
Learn more about Trelleborg Sealing Solutions, here.
Find and share more interesting fluid power technologies and unique applications using #onlyfluidpowercan and follow podcast and other fluid power industry-related updates at @TheNFPA.
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