Tag Archives: dichtomatik

Gasket Types and Their Applications

Understanding the Difference Between Gasket Types

picture of gasketsAs our friends at Dichtomatik like to say, “where there are pumps and valves, there are also gaskets.”  Gaskets are critical components in fluid conveyance systems. There is a wide variety of types and materials that they can be made from.  Many of the most commonly-asked questions revolve around which gaskets are right for which situations for a variety of industries including but not exclusive to: food & beverage, oil & gas, construction, agriculture, energy & power generation, and chemical processing.

While far from an inclusive list, GFS wanted to quickly touch on some of the most common gasket types and materials often asked about.

A Quick Guide to Gasket Types:

Spiral Wound Gasket

Spiral-wound gaskets utilize two sealing elements – the winding and the filler – the winding behaves like an energized spring against the flange surfaces while the filler seals the imperfections between the two surfaces. An outside ring is standard in flange applications to center the gasket between the bolts and help prevent blowout.  Stainless steel inner rings are often added to prevent the windings from buckling inward potentially contaminating the media. They combine high strength with reliable sealing capacity. They function as well in low pressure and temperature applications as they do in more extreme environments, but are more expensive to produce compared to compressed fiber and elastomeric gaskets.

Sheet Gasket

The simplest type of gasket, this is made from common rubber elastomers or compressed fiber and can be easily cut into virtually any size with any configuration. While often suited for low pressure environments, sheet gaskets are an ideal solution for industry standard applications like creating a reliable seal between flanges and fittings for fluid movement.

Elastomer Sheet Gasket

Most rubbers are relatively inexpensive and can be easily cut into shapes on demand. Our friends at Dichtomatik, a subsidiary of Freudenberg Sealing Technologies, maintain a variety of sheet materials to meet customer requirements – including SBR, Neoprene, EPDM, NBR, and FKM.

Aramid Fiber Sheet Gasket

Aramid fibers are a particularly strong and heat-resistant form of synthetic fiber which can have exceptional strength when tightly-woven while being low-weight. They also are highly resistant to impact, abrasion, or chemical erosion.  However, they are also absorptive and have poor compression properties. A broad variety of compressed fiber sheets are available; they are versatile and inexpensive. They can generally handle maximum temperatures and pressures over 700°F and 1,000 PSI. 

picture of different gasketsElastomeric Molded Gasket

Also known as press-in place gaskets, these all-elastomer gaskets are custom-shaped and are designed for applications where there is a groove that positions the gasket between components to optimize the sealing performance in the groove. They are easy to install, require no adhesive, and are self-retaining and adaptable.

Custom-Made Gaskets

For all other applications, there are custom-made gaskets.  Gallagher Fluid Seals can help advise on material, design, and other gasket questions. Our suppliers place us in a position to provide a variety of materials, including flexible graphite, PTFE, FKM, FFKM, and more.


The original article was featured on Dichtomatik’s website and can be found here.

Gallagher Fluid Seals is a partner of Dichtomatik. For more information about finding the right type of gasket, contact our engineering department today.

Metal Detectable O-Rings, A Must Have in the Food & Beverage Industry to Avoid Product Recalls

Metal Detectable O-Rings are a Must-Have in the Food & Beverage Industry

Metal Detectable O-Rings are used in equipment that produce and package food. During service, o-rings are exposed to temperature variations and corrosive clean-in-place (CIP) chemicals used during equipment sterilization.

picture of food and beverageOver time, o-ring materials can break down and fail during operation causing material fragments from the o-ring to break off and enter the food stream. Without a way to find material fragments quickly, machine operators must shut down equipment to locate the contaminate source resulting in lost production time and loss of revenue.

Metal detectable o-rings from DICHTOMATIK are formulated with the specific rubber and metal combination that allows for easy detection using metal detection machines that locate and remove contaminated product quickly or by using metal separators. Having an efficient inspection process to monitor product consistency and quality allows for worn o-rings to be found and replaced quickly to avoid product recalls further downstream once the product is placed on the shelf.

DICHTOMATIK O-Rings & Sealing Solutions That Meet FDA Standards

The DICHTOMATIK complete catalog of food grade rubber seals meet FDA and food safety standards outlined under the Food Safety Modernization Act (2011).

Available Materials

  • Blue – FKM
    • [Best Use Running Condition] *Where  high acid and temperature resistance is critical
  • Yellow – EPDM
    • [Best Use Running Condition] *Offers very good water and steam resistance
  • Green – NBR
    • [Best Use Running Condition] *Use when working with oil and animal fats
  • Orange – Silicone
    • [Best Use Running Condition] *Operate within a wide temperature range

The original blog article was written by the marketing team at DICHTOMATIK and can be found here.

Gallagher Fluid seals is an authorized distributor of DICHTOMATIK seals. For more information about their products or to find a solution that works for you, contact our engineering team.

The Rise of Metal Detectable O-Rings

Food Safety Modernization Act (FSMA)

Every year, nearly 1 in 6 people in the U.S. get sick (~48 million people), 100,000+ are hospitalized, and 3,000 die from foodborne illnesses or diseases, according to data from the CDC. Though this is largely a preventable problem, it still poses a significant public health burden.

The FDA Food Safety Modernization Act (FSMA), enacted by Congress in 2011, is “transforming the nation’s food safety system by shifting the focus from responding to foodborne illness to preventing it.”

Although one might think the relevancy of the FSMA isPastries on a Conveyor Belt more geared towards the food or beverage product itself, this act is actually vital to the processing operations in food, beverage, and pharmaceutical industry.

Over time, exposure to continuous vibration, volatile temperatures, and corrosive chemicals can cause O-rings in processing operations to become worn and eventually fail. When this occurs, particles of rubber from seals and gaskets can shear-off and migrate through sanitary systems, piping mechanisms, or by other means, eventually entering the product stream.

In some cases when a problem is discovered, equipment must be shut down and visual inspections conducted to find the source of contamination. This leads to downtime, lost production, and lost revenue. If the contaminant ends up in the supply chain, even more risk is assumed due to recalls or litigation.

Enter the metal detectable O-ring.

Continue reading The Rise of Metal Detectable O-Rings