rotary seals
- April 16, 2026
The Perfect Wave: The Gerromatic Rotary Seal
Gear motors, pumps and stirring units keep process material in constant motion in the process industry’s production facilities. A large number of shaft seals are used at drive shafts to keep liquids securely within the equipment. But leaks may be more likely to occur if the pressure acting on the seals becomes too great. Freudenberg Sealing Technologies has developed a new rotary seal, the Gerromatic, which has a wave-shaped sealing lip. This increases the maximum amount of pressure that can be applied. The sinusoidal contact path also reduces friction and provides self-cleaning, which extends operating life.
In the process industry, including the food and beverage sector, shaft seals used in equipment mostly have a rotation-symmetrical seal lip, which abuts the rotating shaft with a groove-like contact pattern. During wet-running, this can cause the medium to be displaced at the contact surface. The seal then runs in a more or less dry condition, leading to increased friction and higher temperatures. The increased friction increases wear and reduces the efficiency of the equipment. The accompanying rise in temperature is not desirable, especially when the process media are temperature-sensitive. If the seal lip is also exposed to high temperatures at high rotational speeds – for example, due to a process material that applies pressure to the seal lip in a vessel with a stirring unit below it – the lip can fold down on the low-pressure side, which would result in immediate leakage and the seal’s failure.
- February 26, 2026
Mobile cranes perform a wide variety of tasks, typically of the heavy-duty kind. The work they do and the locations at which they operate are frequently exposed to harsh climatic conditions in places with insufficient infrastructure. This means that the sites at which the cranes are positioned and the environment in which they move is often not entirely suitable for this kind of heavy construction equipment.
Accordingly, there are high loads acting on the components, which
- December 04, 2025
Why Swivel Arm Repairs Fail: The Hidden Role of Flange Seal Engineering
At LNG export and import terminals, swivel arms are among the most relied-on pieces of equipment during loading and unloading. When they operate as intended, they enable smooth movement, controlled flow, and safe transfer of product. When they don’t, downtime adds up fast.
Yet even with stringent maintenance schedules and skilled repair teams, swivel
- November 14, 2025
Cased Lip Seals vs. Spring-Energized Seals: Choosing the Right Sealing Solution
In demanding industrial environments, selecting the right seal design can determine whether equipment operates efficiently or fails prematurely. Among the many sealing options available, cased lip seals and spring-energized seals are two high-performance designs frequently used in rotating,
- October 23, 2025
Designing the Perfect Rotary Shaft Seal
When it comes to maintaining a high-functioning rotary shaft, you need to select the appropriate lip seal.
The shaft seal protects the rotary shaft from contaminants such as dust and dirt, and it keeps water out and lubricant in.
A rotary seal, also known as a radial shaft seal, typically sits between a rotary shaft and a fixed housing — such as a cylinder wall — to stop fluid leaking along the shaft. The rotary seal’s outside surface is fixed to the housing, while the seal’s inner lip presses against the rotating shaft.
Common applications for shaft seals include motors, gear boxes, pumps and axles. They’re also increasingly used for food and chemical processing, as well in pressurized gas applications.
Three of the most important considerations when the choosing the best lip seal for a rotary shaft are:
- The material the seal is made of,
- the hardness of the shaft’s surface, and
- the roughness of the shaft’s surface.
Did you know that Gallagher Fluid Seals manufactures Rotary Seals in-house?
At Gallagher Fluid Seals, we’ve invested in state-of-the-art manufacturing technologies and processes to produce high-performance rotary seals tailored to our customers’ exact specifications. Whether you need a standard rotary seal or a fully customized solution, our engineering and production teams work closely to deliver seals that meet and exceed industry standards. Learn more about our Rotary Seal manufacturing capabilities here.
Here’s your quick go-to guide on how to achieve optimum performance and longevity for your seals and shafts, ultimately minimizing the risk of seal failure.
- October 16, 2025
Optimize Performance with Our Rotary Lip Seal Design Guide
Rotary lip seals play a critical role in protecting rotating equipment by preventing fluid leakage and keeping contaminants out. As machinery demands continue to rise across industries—from manufacturing and power generation to automotive and food processing—selecting the right lip seal is more important than ever.
To help engineers and designers make informed decisions,
- September 18, 2025
Understanding Extrusion Gap in High-Pressure Sealing Applications
One of the most common questions in sealing technology is: How much pressure can a particular seal handle? The answer depends on several factors, but the principal limiting factor in any seal system’s pressure capacity is the extrusion gap, often referred to as the “E-Gap.”
This
- August 21, 2025
Video - Preventing Rotary Lip Seal Failure: 4 Common Modes Explained
Rotary lip seal failure isn’t just inconvenient, it can lead to unplanned downtime, fluid leakage, and expensive equipment repairs. At Gallagher Fluid Seals, we’ve seen firsthand how the right seal design, installation, and maintenance practices can make the difference between reliable performance and repeated failures.
In our newest video, we break down some of the most common rotary seal failure modes and share how
- August 13, 2025
Precision Manufacturing for Oversized Seals
While standard-sized seals are essential for everyday machinery, many industries rely on oversized seals to maintain system integrity in large-scale equipment. Oversized seals present unique challenges in manufacturing, handling, and precision machining, requiring specialized equipment and processes. We prioritize producing high-quality, precision-engineered seals of all sizes, including oversized, at Gallagher Fluid
