Blog
- August 11, 2023
Comparing Conventional Elastomers to DuPont™ Kalrez® FFKM
Today, we continue our series on the world’s most popular perfluoroelastomer, Kalrez.
The agenda for part two of our video series on FFKM will compare conventional elastomers vs. Kalrez®. We will take a deep dive into what makes Kalrez so special for a wide variety of industries and applications worldwide.
Since Kalrez® parts are predominately used in sealing systems, it is useful to review the basic properties of the most popular seal materials compared to the world's most well known FFKM, Kalrez®.
- August 08, 2023
Concrete vibrators are used to remove the air bubbles from concrete mixes to reduce the number of voids, making stronger concrete that is less prone to cracking.
Various vibrator designs are used, including vibrators attached to the outside of steel moulds into which concrete is poured to obtain concrete pre-cast elements.
The concrete vibrator manufacturer that eventually tested Vesconite Superlube had a pneumatic vibrator design that was attached to moulds. The proprietary design used vanes to turn an eccentric rotor to create vibration.
However, in-field trials with different vane materials produced unsatisfactory results since vane swelling, delamination and excessive wear occurred.
Vesconite Bearings provided the concrete vibrator manufacturer with samples of Vesconite Superlube, a bearing material with a coefficient of friction lower than polytetrafluoroethylene and providing a much higher load capacity with ultra-low wear rates.
Vesconite Bearings supplied
- August 03, 2023
DIN 3771 O-Ring Sizing Guide
Gallagher Fluid Seals has published our newest sizing guide, the DIN 3771 O-Ring sizing chart.
Standards such as AS568, BS 1806, DIN 3771, JIS B2401, NF T47-501, and SMS 1586 were developed by national standards organizations to satisfy the needs of their national industries.
The DIN 3771 o-ring standard is issued by The German Institute for Standards (Duetsches Institut für Normung). This standard identifies O-Ring sizes by the Inner Diameter x Cross Section.
In this sizing chart, you will find both metric and actual data regarding the size of each O-Ring in the standard.
For information about how to interpret or read this chart, feel free to contact Gallagher Fluid Seals.
- August 02, 2023
PTFE Metallic Scrapers
Rod scrapers, wipers, and excluders are common place in the seal industry. A wiper or scraper can be a critical part of keeping dust, dirt, and debris out of a hydraulic system.
While a polymer scraper such as a filled PTFE can provide many years of low-friction performance, some extreme applications need a more robust and aggressive design.
The Client Sealing Issue
Our partners at Eclipse Engineering were approached by a customer using a hydraulic cylinder in a metal foundry.
Intense heat and marring media presented a challenging environment for - July 28, 2023
Gallagher Fluid Seals is a Parker Distributor is proud to be proud to be one of the few premier distributors to qualify as a “Parker Seal Technology Center (STC)”.
Press-in-Place Seals (PIP) from Parker
O-rings are a universal seal throughout the world. However, some axial applications may benefit from a different sealing solution called Press-in-Place seals, or PIP seals.
First, let’s define axial seal. “Axial” implies the seal is being compressed from top to bottom. In other words, the seal is pressed between two flat surfaces. One flat surface has a groove cut into it to retain the O-ring and limit compression. This may also be called a face seal.
- July 26, 2023
Freudenberg’s new development for the vulcanization of chloroprene rubber eliminates the need for ethylene thiourea (ETU) as an accelerator – while still meeting the strict requirements of the automotive industry. With this innovation, the company follows its own sustainability goals and also sets a benchmark for new elastomer compounds.
Using ethylene thiourea (ETU) as an accelerator in the vulcanization of chloroprene rubber is standard in the industry. Products with this accelerator have been used successfully for decades and show very good values in terms of low-temperature flexibility as well as the required resistance to media such as greases and lubricants. Due to the risk of reproductive toxicity and its damaging effect on fruit, however, ethylene thiourea should no longer be used if its omission is technically and economically feasible. But so far there have been no alternatives that offer a similar performance or even met the requirements.
- July 21, 2023
Vesconite Wear Rings
Vesconite wear rings should be considered for many of the horizontal split-case pumps operating in the harsh ining and metallurgical environment.
The company’s wear rings are chemically inert in many cases.
Vesconite Bearings, the maker of the thermoplastic that is machined to make the wear rings, has tested its polymer’s chemical resistance to many mild acids, mild alkalis, organic chemicals, solvents, hydrocarbons, oils and fuels, and has a chemical resistance chart that shows chemical resistance for many chemicals.
The polymer
- July 19, 2023
What is Die Cutting? The Benefits of Flat Bed Die Cutting
Die cutting is an all-inclusive term for the process of using a die to cut sheets or rolls of a variety of materials, such as foils, laminates, gasket materials, polyesters, polycarbonates, and more.
- July 13, 2023
Customer Overview
Leading manufacturer of reliable filter & distillation technology for pulp & paper, chemical and petrochemical, and semiconductor applications. Their membrane technology helps to reduce load on energy-consuming evaporators or distillers.
Customer Problem
Customer experienced seal failure in the form of extrusion; the housing structure for their membrane filter could not adequately accommodate the OEM seal
Application Details
- Environment
Filtration for black liquor - System Pressure
- Environment
- July 12, 2023
What is a tanged gasket?
Tanged gaskets are metal (typically carbon steel or stainless steel) punctured through a perforating process and combined with facing materials (commonly fibers, graphites, and other high-temperature materials). They are usually 3 layers, and the “fingers” or “tangs” in the punctured metal are attached to the facing through a combining process creating a mechanical bond. Oftentimes, no adhesive is required.
Applications for Tang gaskets
Gaskets with tanged inserts are typically found in high-temperature and high-pressure seal points. The tanged insert provides radial strength which helps to prevent blowouts. These gaskets are often used in exhaust, head gaskets, intake manifolds, turbochargers, EGRs, catalytic converters, etc. Generally, the mechanically bonded materials are perfectly suited for exhaust environments and remove the concern that an adhesively