Continuous Molding Technology Enhances O-Ring Performance

continuous molding technologyHistorically, technology to produce large diameter molded O-Rings has been limited by press and molding capabilities. One of Gallagher’s premier vendors, Parker Hannifin, has created a proprietary continuous molding technology which ensures the strength and reliability of large diameter FKM, HNBR, NBR and EPDM O-Ring seals. Parker’s solution eliminates the sealing performance problems sometimes found with common spliced rings and serpentine molding methods.

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Reduce Fuel Consumption and CO2 Emissions with the Low Friction Simmerring

Low Friction SimmerringFreudenberg’s Simmerrings seal rotating shafts reliably and are used in millions of applications and with a variety of equipment in general industry and the automotive sector.

This radial shaft seal ring is based on know-how gained from years of experience. It continually undergoes further refinement based on the latest technological developments, and is particularly functionally reliable, flexible and extremely stressable.

Always “up-to-date”
The tried-and-tested original Simmerring keeps up with the times. Freudenberg’s experts have continued to develop it, with improvements in seal lip profiles. This has made it possible to further enhance its reliability and functionality across a broad range of applications. The advances include a friction-optimized design – the Low Friction Simmerring® – to decrease fuel consumption, which leads to reductions in CO2 emissions.

Gallagher Fluid Seals offers a comprehensive selection of Freudenberg Sealing Technologies products suited to a variety of requirements.

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Drop-in-Place Seals

Drop-in-place seals offer easy installation and time-savingdrop-in-place seals assembly, providing seal retention in straight-wall or dovetail grooves.

Gallagher and the Parker ISS Division design each drop-in-place seal with the application in mind, taking into consideration the material and manufacturing process of the mating surfaces to determine the most efficient design.

The drop-in-place design utilizes a rubber encapsulated plastic or metal backbone, lined with retention and stabilizer ribs. This design holds simple or complex seal shapes, easing installation and providing automation possibilities. Small contact points require less flange loading, providing maximum sealing under minimal pressure for non-ideal surfaces.

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Common Reasons for O-Ring Failure

reasons for O-Ring FailureWhile O-Rings are an incredibly useful sealing application, they are not infallible. When they fail, it’s usually because of the combined adverse effects of several environmental factors.

The most common causes of O-Ring failures include:

  • Improper gland design, allowing for too much or too little compression, not enough for seal expansion and tolerance stack-up.
  • Incorrect O-Ring size.
  • Incompatibility of O-Ring elastomer and environmental elements.
  • Improper O-Ring installation.
  • Inadequate O-Ring lubrication.

The combination of stresses on the O-Ring can be complex and difficult to evaluate. Therefore, it is crucial that both the O-Ring compound and size be tested in the real environment of its service. Below you’ll find three examples of the types of O-Ring failure that can occur, what causes the failure and how to identify and correct it. Continue reading Common Reasons for O-Ring Failure

Case Study: How DuPont Kalrez Seals Cut Costs

DuPont KalrezDuPont™ Kalrez® – Total Cost of Ownership Analysis

The drive to reduce costs and environmental concerns have caused many design and processing engineers to turn to perfluoroelastomer sealing parts as the most cost-effective sealing solutions.  The value-in-use of perfluoroelastomer can be proven in operating conditions where conventional elastomers fail.  Even under less arduous conditions, DuPont Kalrez perfluoroelastomer seals can be the best solution, as they can last significantly longer than conventional sealing solutions.

Economics depend on the total system cost

When considering the economics of elastomeric seals, it is vital to look beyond the total cost related to the sealing solution.  The total system cost in use is the sum of the cost of the O-ring seal plus the installation cost plus the downtime cost (including loss of productivity through leakage and clean-up costs).

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O-Ring Temperature Limits

As we’ve seen in previous posts, O-Rings come in a variety of sizes and materials.

The elastomeric materials that O-Rings are made from work under a range of different temperatures. Click on the chart below to learn more about different O-Ring temperature limits.

O-Ring Temperature Limits


For more on O-Rings, including a comparison of some of the properties of commonly used elastomers, download our O-Ring design guide.

Meet the Robotics Experts of Team 1218

Team 1218In the fall of 2002, Chestnut Hill Academy teachers Peter Randall and Rob Ervin were looking for a way to get students excited about engineering and technology.

That led them to found Team 1218, the academy’s award-winning robotics team.

Team 1218 began with four curious students and two willing mentors. The team had very few resources in the beginning, using an empty closet as its shop and a hall as the build space.

Despite the rookie team’s inexperience and limitations, its passion and dedication was the driving force to winning both the 2003 Philadelphia Regional and Rookie All-­Star award.

Gallagher Fluid Seals is a proud sponsor of Team 1218.  The students’s achievements with the program and afterwards as alumni are only matched by the dedication of the faculty leaders and mentors.

At the time Team 1218 was founded, CHA had an engineering graduation rate of exactly 0%. The school quickly recognized the importance of a robotics program to the students and the community, and began to fund the team in 2003 in hope that it would encourage more students to become scientists and engineers.

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Types of O-Ring Applications

So far on this blog we’ve discussed O-Ring sizes, the materials they’re made from, and the ways in which they can be used.

Types of O-Ring ApplicationsIn this post, we’ll talk about the common types of O-Ring applications, and their impact on O-ring sizing and hardware design.

  1. Static Axial Seals

When designing grooves for static axial seals, the first consideration is whether the pressure is coming from inward or outward.

In situations involving outward pressure, the outside diameter of the groove is primary, and the groove width is the primary consideration for the inside diameter. For inward pressure, the inside diameter is primary. This ensures that the O-Ring needs to move the least distance to seal the extrusion gap.

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Resilon™ Polyurethanes Maximize Performance and Extend Cylinder Life

Heavy Equipment Hydraulic Excavator 5255Reliable Solutions:

Parker’s combination of advanced seal design technology and material expertise has produced a reliable zero-leak rod seal package for hydraulic cylinders for greater equipment output which:

  • Extends useful cylinder life
  • Maximizes equipment uptime
  • Extends maintenance intervals

Integral to the design of the zero leak seal package are the characteristics of Parker’s Resilon™ polyurethane material – designed for extended temperature range, wear resistance, compression set resistance, and overall toughness.

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Your Guide to O-Ring Materials

o-ring materialsAs we’ve discussed in past entries on this blog, O-Rings can come in a variety of sizes and have a wide range of uses.

They can also be made from a number of different substances. Here’s a guide to the kinds of O-Ring materials we use, how they are used, and when to avoid using them.

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