One of the central demands from the valve sector and gas industry has been for a seal material that has suitable low-temperature flexibility, and which conforms to the DIN EN 14141 standard. Up until now, there simply hasn’t been a suitable FKM seal material available. But now, the independent seal manufacturer COG has developed a special FKM … [Read more...] about COG FKM seal material Vi 840
Seals
Where are rod seals used?
The rod seal is one of the most critical seals on any type of fluid power equipment. The rod seal prevents the pressurized hydraulic fluid within the cylinder from leaking. Leakage can lead to reduced equipment performance, system failure, and environmental/safety issues. As illustrated at right, rod seals are dynamic seals that are positioned … [Read more...] about Where are rod seals used?
Duo-material seals combine strength and flexibility
Fluid-power engineers who design sealing systems always have to weigh the trade-off of minimizing leaks versus shorter operating life. In hydraulic applications, seals made from two polyurethane components could resolve the conflict between sealing tightness and strength. Freudenberg Sealing Technologies, Weinheim, Germany, is now conducting … [Read more...] about Duo-material seals combine strength and flexibility
How is sealing used in fluid power systems?
By Josh Cosford Seals are like car tires. They’re both absolutely essential to the operation of their respective accompaniment, yet are unappreciated by most, unless you’re a race car driver or fluid power engineer. And just like tires, seals used in fluid power have changed only by quantum leaps (the real use of the expression, which describes … [Read more...] about How is sealing used in fluid power systems?
System Seals releases its second edition Seal Failure Guide
System Seals Inc., Cleveland, has released the second edition of its popular Seal Failure Analysis Guide—a 30-page troubleshooting manual for common seal failure modes. The book is free to the public upon request. Over the past two years, System Seals has been overwhelmed by requests for the guidebook, which has become a shop staple in many of … [Read more...] about System Seals releases its second edition Seal Failure Guide
How often should I replace the seals in my cylinders?
There is a lot of variability in how often you should replace your cylinder seals. First, you have to ask yourself some questions. How often are you using the cylinder should be the first question. How fast is the cylinder moving, and do you have high velocity seals installed on it? What's more, how contamination-free are you keeping your … [Read more...] about How often should I replace the seals in my cylinders?
Trelleborg’s new polyurethane materials meet future standards for seals
Trelleborg Sealing Solutions has launched its polyurethane materials, Zurcon Z53 and Zurcon Z54, which conform to the latest EU REACH environmental standards coming into force in November. In addition, they meet users’ requirements for higher operating temperatures. REACH is a European Union regulation concerning the Registration, Evaluation, … [Read more...] about Trelleborg’s new polyurethane materials meet future standards for seals
What makes a seal for hydraulics different than a seal for pneumatics?
With seals for pneumatic application uses, one consideration to think about is the severeness of the duty. Obviously, the durometer is very important. When you get into a 70, 80, or 90 durometer seal, it becomes very resistant to being smooshed. As the pressure increases—say 3,000, 4,000, 5,000, or maybe even 10,000 psi or more—it simply has a … [Read more...] about What makes a seal for hydraulics different than a seal for pneumatics?
Parker Hannifin unveils metal seal design for extreme temperatures
U.S. Patent No. 9,453,600, for a new stainless steel flat face sealing ring for use with tube fittings in extreme temperature applications, was recently issued to Parker Hannifin Corp. The new seal design was developed by engineers at the Parker Tube Fittings Division and is a principal design feature of the Parker Seal-Lok Xtreme line of flat face … [Read more...] about Parker Hannifin unveils metal seal design for extreme temperatures
How do you install a fluid power seal?
An important consideration for seals in fluid applications is installation—literally how a cylinder seal is installed, and what you need to know when you're picking a seal. How we describe a seal is the cross section, which is looking at a seal from the side. The cross section is the width across the U-cups, or from one side to the other. The depth … [Read more...] about How do you install a fluid power seal?
