Merkel® V-packing Set V 1000 is used for sealing piston rods, plungers and, in exceptional cases, pistons in highly demanding heavy industry applications. Each set comprises of one pressure ring, three or four V-packing rings and one support ring. V 1000 sets are supplied either without back rings or with one or alternatively with two back rings at the support ring for enhanced extrusion resistance.

State-of-the-art pneumatic rod sealing systems use combined wiping/sealing elements as their operating pressures are lower than those of hydraulic systems. In combination with special materials, these sealing systems are high-performing and an outstanding value for the money.

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So-called wipers are used as a third element in the rod sealing system, in addition to the guide elements that prevent the contact of the incoming and outgoing rod with the housing. Their task is to protect the systems’s primary and secondary seals from external contamination and influences. In addition, Static Seals are needed for the cover/cylinder housing intersection.

The sealing of piston rods poses challenges that are difficult to resolve. To reliably retain the hydraulic fluid, the seal material must be relatively soft and resistant to abrasion, while at the same time, the material must have the hardness needed to prevent gap extrusion at high operating pressures and temperatures. Freudenberg Sealing Technologies combines these contradictory requirement profiles in a single component, the HDR-2C.

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For use in environments that require exceptionally high temperature resistance, stability, and carbonization resistance.

Multi-piece rod seal, consisting of a thrust ring made of a PTFE-bronze compound, fabric sleeves and a rubber-sprung backup ring. For harsh operating conditions and large seal gaps.

Two-piece rod seal, consisting of a PTFE profile ring as well as an O-ring as a pre-tensioning element. Among other purposes, for use as the primary seal in a sealing system.

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Multi-piece rod seal, consisting of a polyethylene thrust ring, polyethylene sleeves and an elastomer back-up ring. Suited to harsh operating conditions and ceramic counter surfaces.

Two-piece rod seal, consisting of a PTFE profile ring with a pressure relief function as well as an O-ring as a pre-tensioning element. For use as the primary seal for long strokes or major speed differences in the incoming and outgoing rod.

BestHighTemp bearinggrease

Turned version of the Merkel® T 20 rod seal with a press-fit at the outer diameter. Among other purposes, suited for use as a secondary seal in a sealing system or as a single seal for pressures up to 40 MPa.

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Single-acting, two-piece rod seal suited for use in hydraulic and pneumatic applications. Shortened fabric reinforcement on the running surface.

Tried-and-tested, one-piece rod seal for use as secondary seal in a seal system or as a single seal in pressures up to 40 MPa, among other purposes.

One-piece rod seal with asymmetrical elastomer U-ring and shortened interior lip. Preferably to be used as a secondary seal in a seal system with water and water emulsion operating media.

Steering seals for rotational and reciprocating applications including hydraulic pump and valve seals and dust seals for electric steering systems.

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LPS® 2.0 products are formulated for superior performance with an emphasis on the safety of the user. Each product within the line offers an alternative chemistry compared to the original LPS® product with an improved health and safety profile.

Two-piece rod seal, consisting of a PTFE profile ring with retaining flange to secure against co-rotation and an O-ring as a pre-tensioning element. Suited for rotary and swivel movements.

High Temperature Grease400 degrees

Two-piece rod seal, consisting of a profile ring made of PTFE or PE, a support runner, and an elastomer profile ring as a pre-tensioning element. Usable a single seal in combination with a double wiper. For short strokes up to 10 mm.

Freudenberg Sealing Technologies has been developing innovative brand products at the highest level for decades. We will find a customized solution for you.

Premium Freudenberg brand products meet the highest quality requirements and are suitable for all segments and applications. Complementing this, Dichtomatik brand products are a good solution for moderately demanding, non-safety-critical applications.

Rod Seals from Freudenberg Sealing Technologies are used in state-of-the-art sealing systems for cylinders of all kinds. They are specially adapted to the respective conditions of use and tasks while meeting customers’ high expectations for maximum reliability, service life and functionality. State-of-the-art hydraulic rod sealing systems generally consist of several individual seals (see example in Fig. 1). The so-called primary seal faces the cylinder’s working space and reliably seals against the high operating pressure within the cylinder.

Cat® Valve Stem Seal for cylinder head preventing oil from entering the combustion chamber and ensuring proper lubrication of the valve.

High temperature grease500 degrees

The secondary Rod Seal fitted behind it takes over the main sealing function. It is above all designed to reduce the residual oil film on the rod to a minimum during its extension. Seals constructed of polyurethane are preferably used for this task. With their defined sealing lip, they ensure the finely tuned wiping of the medium, guaranteeing the leak tightness of the cylinder toward the exterior.

HightempGrease forwheelbearings

Two-piece rod seal, consisting of a PTFE profile ring and an elastomer profile ring as a pre-tensioning element. Especially for large diameters and heavy hydraulic applications.

3313

Two-piece rod seal with asymmetric polyurethane profile ring and back-up ring. Among other purposes, usable as a single seal in pressures up to 50 MPa and for bridging major seal gaps.

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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.

Two-piece rod seal, consisting of a PTFE profile ring with a pressure relief function and a support runner as well as an elastomer profile ring as a pre-tensioning element. For use in heavy hydraulic applications as a primary seal for long strokes and major speed differences in the incoming and outgoing rod.

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Two-piece rod seal with a polyurethane profile ring and a backup ring. Especially designed for the sealing of piston rods in rams, advancing cylinders, and secondary cylinders in progressive extension.

Whatever the conditions, sealing systems from Freudenberg Sealing Technologies stand for excellent long-term performance.

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.

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Single-acting, two-piece rod seal suited for use in hydraulic and pneumatic applications. With fabric reinforcement on the running surface.

Hightempgrease600 Degrees

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.

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Smart sealing solutions for nearly every sector, technology trends and exclusive interviews – Find them in our company magazine ESSENTIAL with a print subscription and digitally. Take a look inside!

Single-acting rod seal made of abrasion-resistant polyurethane. For heavy-duty, pneumatic demands and high operating requirements.

Rod Seals are primarily used in pneumatic and hydraulic cylinders and have the task of sealing the incoming and outgoing cylinder rod. The goal is to prevent the escape of the pressurized operating medium from the cylinder. At the same time, it must be protected against external contaminants. Freudenberg Sealing Technologies offers the right Rod Seal for every kind of cylinder and application.

High temperature grease300 degrees

For the sealing of piston rods and plungers – in special cases for pistons as well. Thanks to its robust design, it is extremely well suited to highly demanding, heavy and even lying presses.

High temperature greaseskf

The Freudenberg-NOK PERFECT CYLINDER program for hydraulic seals optimizes sealing technology to help customers reduce their costs and improve the performance of their machinery.

Special single-acting U-ring for sealing severely soiled slewing bearings with a press-fit at the outer diameter. For pivoting motions or slow rotating movements at low to medium pressures.

Two-piece primary rod seal that is basically used within a seal system in combination with a U-ring (e.g. Merkel® U-ring T 20).

Multi-piece rod seal made of a rilled thrust ring made of polyurethane, fabric sleeves and a rubber-sprung back-up ring. Suited to existing designs and short-term underpressure.

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Merkel® V-Packing Set VPS40 is a multi-part seal set for sealing piston rods, comprising one polyurethane pressure ring, one polyurethane V-ring and one elastomeric support ring as energizer.

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This rod seal consists of two high-performance polyurethane compounds with different hardnesses, which Freudenberg chemically combines into a single seal. This removes the need for a back ring and so facilitates easier installation.

High temperature Grease1000 degrees

The HDR-2C is thus the ideal solution for harsh operating conditions. It stays dynamically sealed under low and high pressure loads in a broad range of temperatures, from -50 to + 110°C. When compared to conventional one-component rod seals, extrusion gaps that are twice the normal allowable size are possible.

With the "easy to find" fluid power seal poster, it only takes a second to pre-select the right seal for your application.

Two-piece rod seal, consisting of a polyurethane profile ring with a pressure relief function and an O-ring as a pre-tensioning element. Usable as a single seal in combination with a double wiper.

Freudenberg Sealing Technologies has continued to develop its rod sealing systems and to equip them with additional functions. For example, in addition to storage modules to take in drag oil, pressure discharge functions are used when special requirements arise, including long strokes or great differences in a rod’s incoming and outgoing speed. They effectively prevent an excessive system-related buildup of pressure within the sealing system and protect against the premature failure of the primary and secondary seals.