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Large devices for metal processing

Metal Processing

High Functionality, Reduced Downtime

In the Iron and Steel industry, there are pronounced demands on people, materials and technology. Freudenberg Sealing Technologies provides compact sealing systems that seal reliably – even in extremely harsh conditions – to meet these challenges, as well as high operating life requirements, including temperature, stroke, speed, pressure, friction, duty cycle, radial force and lubricants.

Our seals contribute to:

  • Better output – benefitting both quantity and quality
  • Lower costs
  • Less downtime
  • Improved performance through longer maintenance cycles

Customers face unique requirements and challenges across their manufacturing operations, including steel mills, finishing lines, continuous casters and rolling mills. Learn more about our specific solutions for Stands, Gearboxes, Casters and EAFs.

For Mill Stands

Solutions for Balancing Cylinders and HAGC Cylinders

We offer solutions for maximum control of a short-stroke, high-frequency cylinder, as well as sealing systems that optimize protection for counter surfaces.

The well-matched combination of Freudenberg seals and guide bands prolongs service intervals. Our PTFE glass compound is self-lubricating and is gentle to the surface, which helps reduce maintenance costs.

Sealing Systems for Balancing Cylinders

Precice guiding – long service intervals
  • Superior adjustability and cylinder control, thanks to the advanced frictional behavior of Merkel® Omegat PTFE seals
  • The patented Merkel® Guivex geometry enables high loads, while reducing the risk of metal-to-metal contact
  • Our unique sealing arrangement helps improve performance and enables shorter housings
Download Solutions Sheet

Sealing Systems for HAGC Cylinders

Gentle to the surface – reduced maintenance costs

We have the expertise to improve the accuracy of HAGC cylinders, while boosting performance, reliability and durability.

  • Minimum wear is critical. That’s why we use a self-lubricating PTFE glass compound, which is ideal for short strokes and high frequencies
  • Our systems are also very functional, reliably handling high pressures (even above 30 MPa) due the heavy-duty design of the Merkel® Omegat seal, and, simultaneously, offering maximum service life
  • External “protective screen” in extremely dirty environments – Merkel® double wiper PT 2 offers the best protection for a long-lasting sealing system
Download Solutions Sheet

Solutions for Work Rolls and Back-up Rolls

Specially designed for work rolls, Freudenberg’s tailor-made sealing combination (RPM41 + Environmatic) provides secure and reliable sealing. For manufacturing customers, this adds up to maximum tons produced with minimal lost hours to downtime. We know how to increase service life for work rolls.

Our RPM41 + Environmatic combination offers these advantages:

  • Readiness of supply – within hours, if needed
  • Reliable protection against water ingress into lubricant
  • Gentle to the housing – easy to install and remove
  • Eliminates tension spring at the sealing lip for improved operational safety

Further Sealing System for Roller Bearings in Work Rolls

Merkel® Radiamatic R37 in tandem arrangement and cover plated, in combination with a water guard Merkel® Enviromatic EA
  • Operating speeds up to 25 m/s
  • Space-saving design utilizes integrated lubrication grooves in the sealing element
  • Precise line forces of the sealing edge yields leak-free performance and minimal wear
Download Solutions Sheet

Sealing Systems for Plain Bearings in Back-up Rolls

Merkel® Radiamatic RHS51 in combination
  • Solid performance – even up to ±3 mm shaft deflection, with speeds up to 35 m/s (40 m/s intermittent)
  • Self-retaining fit by vulcanized-in steel bands
  • Simple, housing-friendly installation
Merkel Radiamatic RPM 41 and Merkel Environmatic

Maximum Protection for Your Work Roll Bearings

Merkel® Radiamatik RPM41 + Merkel® Envirnomatic

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Merkel® Omegat OKDS-0168, Omegat OSDS-0169 in combination with a special guide band made of resin bonded fabric

Sealing Systems for Gearboxes

In addition to its original Simmerring® for Gearboxes, Freudenberg offers superior sealing systems for the demanding transitions between the spindle and drive.

Benefits include:

  • A floating cartridge for high axial movements
  • No wear issues
  • No leakage issues

Sealing Systems for Continuous Caster Segments

Simmerring® Type BAUM for Open Housings

  • High wear resistance for long service life at high temperatures
  • Standard seals are readily available
  • Simple installation for low service cost

Simmerring® BAUM with self-retaining fit in the housing. In case of heavy contamination, a protective lip or “filter fleece” is available to help optimize operating life.

Versatile U-Ring Solution for Low Speeds

  • Easy to install snap-in function
  • Material mix to meet specific requirements
  • No metallic components = no risk of corrosion

Merkel® U-ring NRSF made of NBR, HNBR, FKM or Polyurethane

When It Gets Too Hot

  • Reliable protection of the bearing against contamination by PTFE wiper
  • Suitable for high speeds and high temperatures
  • Low friction and greatly reduced wear due to Freudenberg’s self-developed, high- quality PTFE compounds that, in addition to the actual sealing function, also protect the counter surface

Both made of Carbon filled PTFE: Merkel® U-ring NRRW in combination with a Merkel® water guard WADB-9460

Sealing Systems for Electric Arc Furnaces (EAF)

The robustness of a Merkel® V-packing set is unique

For Easy Replacement

  • Long lifetime, even without bellow protection of the rod
  • Reliable sealing function, even if the rod is highly strained
  • Split version for ease of installation and reduced maintenance cost

Download Solutions Sheet  ›

Pressure relief function offers high operational reliability

For Low Friction and Long-Stroke Performance

Our products are designed to reduce friction loss.

  • Stick-slip-free operation allows precise positioning
  • Ideal sealing function for long service intervals without leakage

* Important note: The rod must be protected against sparks and similar hazards

Download Solutions Sheet  ›

Contact Us Today

Our steel and iron industry experts can address all your questions, including:

  • Flexible profiles
  • Non-standard seal sizes
  • Delivery times
  • Short- and long-stroke systems
  • Emergency services
  • On-site troubleshooting capabilities

Together with key partners, Freudenberg provides a wide range of high-quality sealing systems, including complete sealing kits to meet your needs.


    Related Documents

  • Brochures 66-plus 67-minus


    Sealing Solutions for Metal Processing

    Our products and services are renowned for their outstanding performance. It’s good to know that we can make valuable contribution to the success of major OEM‘s and after market customers in various industries.

    English | PDF | 1479 KB

  • Solutions Sheets 66-plus 67-minus


    Sealing Solution for Plain Bearings

    Freudenberg offers solid sealing performance, self-retaining fit and simple installation for plain bearings with Merkel® Radiamatic RHS 51 and Enviromatic EAX.

    English | PDF | 488 KB


    Sealing Solution for Work Rolls

    Specially designed for work rolls, Freudnberg’s tailor-made sealing combination provides secure and reliable sealing.

    English | PDF | 1026 KB


    Sealing Solution for EAF Low Friction

    Freudenberg sealing solution reduces friction loss and prevents leakage during long service intervals. Combine Double wiper PT 1, U-cup L20, Rod seal and guide band for low friction and long-stroke performance

    English | PDF | 2067 KB


    Sealing Solutions for EAF Easy Replacement

    The combination of Merkel® V-Packing set ESV and Merkel® wiper P6 offers unique robustness, easy installation and long-term reliable sealing function.

    English | PDF | 544 KB


    Solutions Sheet for Balancing Cylinders

    Our unique sealing arrangements of Merkel® Double Wiper PT2, Rod Seal and Guivex Guide Bands combined to enable high loads, reduce friction and provide shorter housings.

    English | PDF | 1547 KB


    Solutions Sheet for HAGC Cylinder

    Our sealing solution combines Merkel® Double Wiper PT2, rod seal, piston seal and Merkel® Guivex guide band to minimize wear, extend protection, improve the accuracy of HAGC cylinders, while boosting performance, reliability and durability.

    English | PDF | 1785 KB


    Merkel® V-Packing Set ES / ESV

    Merkel® V-Packing Set ES or type ESV are multi-part seal sets for sealing piston rods, comprising one pressure ring, at least three V-rings and one support ring. The V-packing sets are available in three different versions.

    English | PDF | 314 KB


    Merkel® Omegat OMS-S

    Merkel® Omegat OMS-S is a two-piece seal set for sealing piston rods, consisting of a PTFE profile ring and an elastomer profile ring as a pre-stress element.

    English | PDF | 283 KB


    Merkel® Omegat OMK-S

    Merkel® Omegat OMK-S is a two-piece seal set for sealing pistons, consisting of a PTFE profile ring and an elastomer Profile ring as a pre-stress element.

    English | PDF | 285 KB


    Merkel® Guivex SBK / KBK

    Merkel® Guivex SBK respectively the version KBK are profiled piston (SBK) and rod (KBK) guide rings made of resin bonded fabric.

    English | PDF | 1148 KB


    Merkel® Enviromatic EAX

    Merkel® Enviromatic EAX is a deflector seal made of elastomeric material featuring an axially acting sturdy sealing lip with a well-defined sealing edge.

    English | PDF | 281 KB


    Merkel® Omegat OMS-MR

    Merkel® Omegat OMS-MR is a two-piece seal set for sealing piston rods, consisting of a PTFE Profile ring and an O-ring as a prestressing element.

    English | PDF | 251 KB


    Merkel® U-Cup L20

    Merkel® U-Cup L20 is an elastomer U-Cup seal with an asymmetrical profile.

    English | PDF | 249 KB


    Merkel® Double Wiper PT 1

    Merkel® Double Wiper PT 1, consisting of a PTFE profile ring with one sealing and one wiping edge, plus two O-rings as pre-stressing elements.

    English | PDF | 242 KB


    Merkel® Radiamatic RHS 51

    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.

    English | PDF | 265 KB


    Merkel® Double Wiper PT 2

    Merkel® Double Wiper PT 2, consisting of a PTFE profile ring with one sealing edge and one wiper edge, plus two O-rings as prestress elements.

    English | PDF | 232 KB


    Merkel® wiper P 6

    Merkel® wiper P 6 is a single-acting elastomer dirt wiper with support segments to avoid twisting.

    English | PDF | 265 KB


    Merkel® Radiamatic R 37

    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.

    English | PDF | 293 KB


    Merkel® Radiamatic R 58

    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.

    English | PDF | 268 KB


    Merkel® Radiamatic RPM 41 Seal

    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.

    English | PDF | 329 KB

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