Dynamic Seals

Radiamatic Shaft Seals


Our products in detail

Radiimatic

Radiamatic HTS II

Simmerring® Radiamatic HTS II - shaft seal rings offer multifaceted options for use in the processing industry. This special development made of PTFE is distinguished by its lip's low contact pressure on the shaft and, as a result, low frictional losses.
FST Radiamatic Merkel R35

Merkel Radiamatic R 35

Shaft seal ring with a fabric-reinforced static part that is securely joined to the elastomer sealing lip. The sealing is also preloaded with a garter spring. Primarily suited to roller mills and large gearboxes in heavy machinery manufacturing.
FST Radiamatic Merkel R36

Merkel Radiamatic R 36

Based on the Radiamatic R 35 model with additional radial grooves for efficient lubrication from the exterior in a tandem arrangement.
FST Radiamatic Merkel R37

Merkel Radiamatic R 37

Based on the Radiamatic R 35 model with additional radial grooves and a circumferential groove for efficient lubrication from the exterior in a tandem arrangement.
FST Radiamatic Merkel R55

Merkel Radiamatic R 55

Based on the Radiamatic R 35 model with a large reinforced garter spring and an integrated, functionally decoupled deflector lip to protect against external contaminants. Primarily envisioned for the main bearing area in wind turbines.
FST Radiamatic Merkel R58

Merkel Radiamatic R 58

Based on the Radiamatic R 37 model. Suited to the special requirements of grease-lubricated bearings in rolling mill construction.
FST Radiamatic Merkel RH251

Merkel Radiamatic RHS 51

High-speed shaft seal ring with integrated steel strip for a firm fit in the housing. High allowable shaft offset. Primarily for rolling mills and large gearboxes.
FST Radiamatic Merkel RPM41

Merkel Radiamatic RPM 41

Innovative, self-retaining shaft seal ring without a pre-tensioning element at the seal lip. Short delivery time, including the express delivery of customized dimensions. Typically used in grease-lubricated roller bearings in roller mills, such as those in the steel industry.
FST Radiamatic Merkel RS85

Merkel Radiamatic RS 85

Self-retaining shaft seal ring with two functional elastomer components and an integrated steel strip. Conceived for shaft feedthroughs in heavy machinery construction.

Related documents

Brochures

Pdf

The Radiamatic® HTS II is a special PTFE variant of the Simmerring® product group. This high-performance radial shaft seal sets standards in the sealing of rotating shafts and spindles.

Pdf

Sealing solutions specially developed for the process industry in accordance with hygienic design and materials with industry-specific approvals.

Sales Sheets

Pdf

Rotary hydraulic seals (Rotomatic 2c) are replacing existing elastomer energized PTFE seals used in construction and agriculture transmission, and rotary actuators (swivels). Standard sealing solutions are failing to address application demands and customers want higher sealing lifetimes with easier assembly.

Pdf

Best sealing qualities under severe stresses – PTFE shaft seal for demanding applications in the food industry

Pdf

Merkel Radiamatic R35 and Merkel Radiamatic R55 radial shaft seals help ensure long-term, reliable performance of the main bearing in wind turbines. The main bearing in a wind turbine is a key component in the generation of electricity from this renewable energy source. For a zero-defect performance the bearing seal has to fulfill the highest requirements.

Pdf

The Radiamatic RPM 41 is a Simmerring® made from an elastomer material with an embedded steel body featuring radial and circumferential lubricating grooves for twin arrangement. The Radiamatic RPM 41 is typically used for sealing flange bores on working rolls in rolling mills.

Pdf

The new Radiamatic RCD is a liquid-collecting labyrinth seal. It is non-wearing, non-aging, and highly resistant to thermal and chemical wear.

Pdf

Merkel Radiamatic R 35 is a radial shaft seal consisting of a fabric reinforced section of sturdy design, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft.

Pdf

Merkel Radiamatic R 36 is a radial shaft seal consisting of a fabric reinforced section of sturdy design, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft.

Pdf

Merkel Radiamatic R 37 is a radial shaft seal consisting of a fabric reinforced section of sturdy design, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft.

Pdf

Merkel Radiamatic R 55 is a radial shaft seal consisting of a fabric reinforced section of sturdy design, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft.

Pdf

Merkel Radiamatic R 58 is a radial shaft seal consisting of a fabric reinforced section of sturdy design, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft. Radial shaft seal with a groove around the circumference to facilitate additional lubrication from the outside.

Pdf

Merkel Radiamatic RHS 51 is a radial shaft seal for high circumferential speeds, consisting of two different rubber compounds and an integrated steel band. A new spring system exerts evenly radial force over the whole circumference of the sealing lip, even at high misalignment of the shaft.

Pdf

Merkel Radiamatic RS 85 is a self-retaining shaft seal consisting of two different rubber compounds and an intergrated steel band. The tension spring supports the radial force on to the shaft.

Pdf

NOK Radiamatic SBR is a radial shaft seal consisting of an endlessly manufactured steel cage, firmly bonded to the rubber sealing lip. A helical tension spring assists radial contact pressure of the lip on the shaft.

To us, leakage is a foreign word

Radiamatic Shaft Seals for a clean world

The requirements are high. Freedom from leakage is not only a "must" for drive shafts in shipping. Cleanliness is also of utmost importance in the paper industry with its high-speed rolls. There are other key factors in addition to the required high functionality: robustness, ease of installation and above all the quick availability of shaft seal rings, for example, in the steel industry. Freudenberg Sealing Technologies has risen to these challenges and provides made-to-order shaft seal rings with the maximum leak tightness and reliability for a wide range of applications.

Made-to-order for work rolls

FST RPM 41

The newly developed Merkel Radiamatic RPM 41 (Fig. 1) is an example of a shaft seal ring made-to-order by Freudenberg Sealing Technologies. In addition to its FEM-optimized design, a special material was developed for the Radiamatic RPM 41. The seal lip made of pure elastomer requires no spring for pre-tensioning and offers minimal friction along with a maximum sealing effect. A vulcanized-in pre-tensioning element provides a tight, secure fit in the installation space. This prevents potential damage to the installation space. In addition, a special production process makes the seal’s high availability possible: All the current standard profiles with any diameter up to 1,100 mm can be delivered within 24 hours when necessary.

Maximum circumferential velocity

FST Merkel Radiamatic RHS 51

The Merkel Radiamatic RHS 51 covers an entirely different area (Fig. 2). This shaft seal ring is always used when it is imperative to deal with maximum circumferential velocities. It can be employed at speeds up to 40 m/s, even as it offsets high shaft misalignment. The Radiamatic RHS 51 owes these characteristics to a double spring acting as a pre-tensioning element for the seal lip, along with an elastomer material especially developed for this application. The spring provides a defined, uniformly distributed radial contact pressure. The paper and steel industries in particular benefit from the high performance of this shaft seal ring from Freudenberg Sealing Technologies.

Multifunctionality in an extremely small space

Merkel Radiamatic R55

Shaft seal rings with additional functions are used to seal the main bearing in wind turbines, among other uses. One example is the integration of a deflector lip to protect against external contaminants. The result is a compact installation space.

 

 

But in multifunction seals, it is essential to ensure that the individual sealing functions are operationally decoupled from one another. But that is not a matter of course in sealing systems made of elastomer materials. By contrast, the newly developed Merkel Radiamatic R 55 from Freudenberg Sealing Technologies manages this balancing act. Even at shaft deflections of ± 1.6 mm, the full functional capacity of the sealing and dust lips are maintained (Fig. 3). This is a prerequisite to meet high service life expectation of up to 20 years.

For clean processes

In the process industry, the Simmerring® Radiamatic HTS II shaft seal ring  offers diverse options for its use, such as bottling systems, food equipment, and pharmaceutical and cosmetics units, along with mixers. The key advantage of HTS II shaft seal rings is their high resistance to media since the substances only come into contact with PTFE. This makes it possible to achieve particularly hygienic processes.  For approaches based on hygienic design, Freudenberg Sealing Technologies offers dead-space-free variations, such as HTS II 9539 VL with a forward-positioned seal lip. 

Relevant market segments

Freudenberg Sealing Technologies Chemical Plant

Chemical

Aggressive, sometimes toxic media, high pressures as well as extreme temperatures and temperature fluctuations – seals face special challenges in the extraction...

Freudenberg Sealing Technologies Commercial Marine

Commercial Marine

Ships are the largest movable man-made structures. Accordingly, their requirements are substantial and multifaceted. Freudenberg Sealing Technologies provides…

Freudenberg Sealing Technologies Construction

Construction

Construction and mining machines operate in the most diverse, challenging, and demanding environments around. Freudenberg Sealing Technology offers...

Freudenberg Sealing Technologies Distribution

Distribution

Freudenberg Sealing Technologies proceeds just as systematically in the selection of its strategic distribution partners as it does with seal quality. Its global...

Freudenberg Sealing Technologies Energy

Energy

Efficient, reliable, cost-effective, resistant to environmental influences, and trouble-free during installation and maintenance: That's what wind power and solar...

Freudenberg Sealing Technologies Food and Beverage

Food & Beverage

Seals face multifaceted tests in the manufacture of foods and beverages. At the same time, hygiene and the greatest possible cleanliness are always the top...

Freudenberg Sealing Technologies Metal Processing

Metal Processing

An extremely contaminated environment, strong radiant heat or special, flame retardant media – in the iron and steel industry, there are particularly pronounce...

Freudenberg Sealing Technologies Pharmaceutical

Pharmaceutical

The bar has been set especially high for pharmaceuticals when it comes to cleanliness and hygiene. For the highly-sensitive aseptic field, Freudenberg Sealing...

Freudenberg Sealing Technologies Power Generation

Power Generation

Large diesel engines must run reliably and efficiently even under the most adverse operating conditions. This can only happen with first-class seals. Low-friction…

Freudenberg Sealing Technologies Power Transmission

Power Transmission

Industrial gears are bearing heavier loads and have to last longer. Groundbreaking sealing solutions from Freudenberg Sealing Technologies have become a key to...

Freudenberg Sealing Technologies Pulp Paper

Pulp & Paper

Seals from Freudenberg Sealing Technologies even withstand extremely high speeds and severe temperature fluctuations. For customers in the pulp and paper industry...