Blog
- January 03, 2023
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This post is the third installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze, and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
Understanding the basics of volume fill
The final essential criterion for O-ring design is volume fill, also called gland fill. The compressed O-ring must have extra space within the groove without overfilling the groove. Volume fill is the O-ring volume divided by the gland volume.
- December 29, 2022
In the world of engineering, machinery, and mechanical systems, dust can be the difference between a reliable piece of equipment and disaster.
Dust can cause major damage to cylinder walls, rods, seals and other components inside of machinery. And if you’re not careful, dirt, mud, debris, and water can all cause damage as well.
These foreign contaminants are real problems for mechanical systems, especially as they build up in small quantities over time. A single particle of dust today may be no big deal. But a speck of dust per day will eventually become enough of a presence to cause serious issues, like friction, surface wear, and imperfect seal contact between surfaces.
These issues could compound until the mechanical system experiences a complete failure. And in some applications, like in automobiles and aircraft, failure is simply not an option.
Beyond those industries, many types of equipment need to stay clean on the inside, even when things get extremely messy
- December 27, 2022
Mechanical Seals for Agitators
HSMR34 and SeccoMix R are seals for every situation. Sealing technologies need to live up to the highest demands, especially for agitators with side and bottom entry drives, where the product literally presses down on the sealing gap.
EagleBurgmann has developed two series of modual mechanical seals to meet these unique requirements. HSMR34 is a liquid-lubricated and Seccomix R, a dry-running agitator seal. Both can easily cope with any installation situation, whether it's a top, side, or even a bottom entry drive.
HSMR34 and SeccoMix R
HSMR34 and SeccoMix R are designed as pressurized double seals. The characteristic feature of both series is a solid counter-ring that extends into the product. This makes a decisive difference with several advantages, such as excellent thermal conductivity.
- December 22, 2022
Expansion Joint Surveys
Gallagher Fluid Seals is proud to provide the Rubber Expansion Joint Surveys & Failure Analysis white paper to customers, which can be found on our Resources page. This white paper discusses the importance of inspecting your plant’s expansion joints. Proper design and maintenance of rubber expansion joints plays a major role in the overall preservation and lifespan of a piping system.
It also discusses failure analysis of rubber expansion joints and some of the leading causes of joint failure.
Below is an except from the white paper, discussing design and maintenance of rubber expansion joints, as well as the importance of expansion joint surveys.
- December 20, 2022
Used as protective devices designed to isolate pressure gauges, pressure transmitters, and pressure switches from potentially damaging process media, diaphragm seals provide effective solutions to protecting pressure instruments. Typically used in refining, petrochemical, and chemical plants, they can help extend the lifetime of various instruments by preventing contact between dangerous hot or corrosive media and the gauge.
Diaphragm seals were especially designed to meet the safety demand requirements of the process industry to offer the utmost of protection against harsh temperatures, variable pressure ranges, pulsation, vibration, aggressive chemicals, and steam.
Understanding How the Seal Actually Works
A diaphragm seal is usually connected to the measuring instrument using a direct connection or capillary. It is an elastomer or flexible metal diaphragm that keeps the process media from coming into contact with the workings of the gauge. The chamber between the
- December 15, 2022
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.This post is the second installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
Understanding the basics of compression
To form a robust seal, adequate compression or squeeze is a critical consideration. Compressing the seal energizes it, and the O-ring pushes back on the mating surfaces. This contact force between the O-ring and hardware creates a seal. Squeeze is calculated by the cross-section diameter minus the gland depth, all divided by the
- December 13, 2022
GYLON EPIX™ is a family of gaskets that effectively seals a broader range of applications and is more forgiving during the installation process. It allows the end user to save valuable turn-around time, reduce re-work, and lower costs, helping them to finish ahead of schedule and under budget.
GYLON EPIX™ features a hexagonal surface profile that provides the torque retention and blowout resistance of a thin gasket and the conformability of a thicker gasket. GYLON EPIX® Style 3500 is a high performance, silica filled PTFE gasket sheet material designed for use with strong acids, solvents, hydrocarbons, and other aggressive media. GYLON EPIX® Style 3500 withstands a wide range of chemicals for extended service in a wide variety of applications.
- December 08, 2022
FlangeGuards is the Leading Manufacturer and Supplier of Pipe Safety Shields
Pipe safety shields, also known as flange guards or "flange diapers," are used in a variety of industries. Their primary application is the prevention of harmful spray-outs and mist formation from failing pipe joints. Oftentimes, these mists are composed of toxic, corrosive, and dangerous liquids such as acid, oil or steam.
- December 06, 2022
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.This post is the first installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze, and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
Understanding the basics of stretch
A basic design principle often used as the starting point for O-ring grooves is stretch. One of the reasons elastomers are ideal materials for O-rings is because their elastic properties allow the O-ring to stretch around hardware and return to the original shape while within the material’s elastic deformation range.
The percent
- December 02, 2022
New GFS Tech Bulletins Now Available
Common O-Ring Elastomer Properties "Cheat Sheet"
While there are dozens of unique elastomers used for specific applications throughout the world, this GFS "elastomer cheat sheet" discusses the properties of the most common types of o-ring elastomers. If your equipment or product uses o-rings, it more-than-likely contains one of these nine elastomer types.
Learn about:
- Thermal properties of the nine most common o-ring elastomers
- Advantages and disadvantages of each elastomer
- Comparison of the properties/resistances of each o-ring elastomer
Surface Finish Ra Advantages and Disadvantages Tech Bulletin
As we continue the GFS series on Surface Finish, this next tech bulletin will help you understand the advantages and disadvantages of the most commonly used method of measuring surface finish: Ra
It monitors production and is a very stable and
