Fluid Power Journal

Demystifying Chemical Compatibility of Seals and Fluids

By Lucy Heyduk, Material Development Specialist, and Tim McCulfor, Material Development Manager, Trelleborg Sealing Solutions The chemical compatibility of a …

PRESSURE TRAP B versus D LIP U-SEALS

By Sonny Goldsmith What is the difference between a “B” lip u-seal and a “D” lip u-seal? When do you use one style and when should you use the other? …

Directional Valve Seals Failing

I was asked to help inspect a 4″ bore, 2″ rod cylinder that had a 40″ stroke and an 8″ stop tube. It had a D05 size mounting pad …

Effects of Grease on Rotary Shaft Seals

Less than 20% of seals and gaskets ever reach their expected “operating life” in any given application. Of the 80% that are replaced due to scheduled …

Pressure Effects on Seal Performance

Standard shaft seals or rotary shaft seals are typically found in low-speed or low-pressure environments. As the speed of the shaft increases, the maximum …

Advanced Surface Analysis of Mechanical Seals

Flowserve Corp., a provider of flow control products and services for the global infrastructure markets, has harnessed the high-accuracy surface measurement …

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