In July, Gallagher released its Expansion Joint Design Guide, now available for download on our site. This design guide takes an in-depth look at elastomeric, metal, and flue duct expansion joints. The excerpt below is a section of our Expansion Joint Design Guide focusing on types of flue duct expansion joints. To download the entire guide, visit our Resources Page, or click on the image to the right.
Used to manage air and gas handling systems, flue duct expansion joints are most widely utilized in the Power Generation, Industrial & Institutional industries:
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.
The substances used in the food and in the chemical process industries are identical in many cases, whether they are of natural origin or synthetically produced. Irrespective of their type and occurrence – be it in process media, in raw materials for products or in finished products – the materials for seals and engineered components used in production equipment coming into contact with diverse chemical substances have to meet specific purity requirements and be resistant to chemicals under the given process conditions. Purity and stability are therefore basic prerequisites for materials in the chemical process industry and the food industry. The challenge lies in selecting the proper sealing material for an application.
Consumer health and safety are of paramount importance in food, beverage and pharmaceutical production processes. Therefore, the materials have to comply with specific legal requirements and standards, depending on their application. The harmlessness of the materials for the intended uses, such as applications involving contact with foodstuffs and drinking water, must have been certified by relevant approvals and conformities. Equally important to consumer safety is that the materials are free of polycyclic aromatic hydrocarbons (PAH), phthalates, mineral oil based plasticizers and animal derived ingredients (ADI).
The Orion Engineered Seals patented Bearing Protection Device (BPD) represents state of the art bearing protection technology which provides maximum protection against contaminants while maintaining lubrication in the bearing. It is the premier non-contacting bearing protection device on the market today.
The BPD was designed with an understanding of the nature of the bearing housing environment under all operating conditions and utilizes the laws of physics to create what has proven to be the best performing and most cost effective way to protect the bearings of your rotating equipment. Every feature of the BPD is designed to work together as a system.
Two Vertical Internal Chambers - The Orion BPD utilizes the laws of physics with the vertical alignment of the internal chambers to create the most effective and efficient bearing protection device on the market today.
Internal Static Elastomers - BPD is the only true non-contacting device with two internal static elastomers, eliminating the potential of dynamic o-ring hangup.
Contaminant Exclusion - With double exclusion chambers, the Orion BPD can exclude the higher volumes of contaminant, ensuring longer bearing life.
Angled Oil Return - With an angled oil return, the Orion BPD offers enhanced return flow and higher volume capacity with no oil leakage.
Angled Interface - While competing products offer a straight interface, the Orion BPD features an angled interface, giving the contaminant direction and flow to expel more efficiently.
Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell. Below is an excerpt from the new white paper. You can download it in its entirety by clicking on the thumbnail to the right.
The following is a simplified process chart for chip manufacture in the semiconductor industry:
Following the process shown above:
Gallagher Fluid Seals has added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell. Below is an excerpt from the new white paper. You can download it in its entirety by clicking on the thumbnail to the right.
The semiconductor industry, one of today’s major industries, produces integrated circuits (chips) which have found their way into everyday devices from toasters to smartphones to high speed computers. Integrated circuits are expected to perform operations faster and faster while attaining ever higher levels of reliability. As these chips become more complex and powerful the process for their manufacture becomes more complicated. Years ago a chip may have gone through 100 steps as underlying circuits were constructed. Now chips may go through more than 400 steps and the complexity of these circuits, and their capability, has greatly increased. This also results in more opportunities for problems during manufacture. Line widths, the width of the electrical pathways, have decreased in order to pack more capacity into each chip. This dictates that contaminants from the production equipment, gas streams, seals, etc., must be essentially eliminated to avoid contamination and chip malfunction.
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.
We've all done it at least once: looked at a rubber test report, read the numbers on it, and come up with exactly the wrong conclusion. Pass / fail limits and results are printed right there, but for some reason, our brain just misinterprets the two. It's a passing value, but for some reason, we think it shows a failure instead. Imagine a police officer writing a speeding ticket for driving 53 MPH on a road with a 55 MPH speed limit.
It's not a problem with the test itself, it's a problem of interpretation. That means the old carpenter's adage, "measure once, cut twice; measure twice, cut once" doesn't address the issue. The same issue of misunderstanding the values on a test report occurs in the rubber seal industry about once a month. Passing results are misinterpreted to be failing results, and good values are thought to be bad ones. Here are four of the most common rubber test report misunderstandings I've run into.
Purity is critical to high wafer yield, and Kalrez® seals are designed with properties that help reduce contamination from particulates, outgassing and extractables.
In a number of fabrication customer evaluations, Kalrez®seals exhibited improved mechanical strength, lower particle generation and longer seal life versus competitive perfluoroelastomers, in both static and dynamic sealing applications.
Operational Improvements
Kalrez® seals can help improve semiconductor manufacturing in a range of wafer-fabricating operations, including: