Dynamic seals

Dynamic Seals

Damp & Seal

FST Damp Seal
  • the removal of two components means less work for purchasing and logistics
  • greatly reduced machining of the cylinder cover
  • less space required, thus suitability for very compact cylinders
  • mounting reliability since damping seal can only be installed in one direction 

 

Comprehensive functional tests show extremely low rebound. This reduces the overall volume load on the cylinder and adjacent parts, while also significantly minimizing the acoustic emissions.

One part replaces three components

Innovative damper seal for pneumatic cylinders

The damping seal  from Freudenberg Sealing Technologies combines the functions of what would normally be three components into a single part. This not only simplifies processes for the manufacture of pneumatic cylinders, but it also simplifies purchasing, storage and logistics as well. In addition, damping seals offer outstanding damping characteristics thanks to its specific design and highly stressable materials.

In pneumatic cylinders, the kinetic energy of the moving masses is reduced shortly before they reach the stop position, generally due to the compression of air volume and a defined throttling of the exhaust air. In today's standard designs, these distinct functions are performed by several components: the actual damping seal, the O-ring for static sealing, and an additional elastomer stop washer, for cases when the piston strikes the cover with a residual speed despite the pneumatic damping. The installation groove for the damping seal is either machined or a morticed retaining ring is required.

The 3-in-1 Damping Seal

FST Damp Seal Example

The portfolio of Freudenberg Sealing Technologies includes the new 3-in-1 damping seal (see Fig. 2), in addition to conventional solutions (see Fig. 1). This innovative rod damping seal fulfills all these functions simultaneously: dynamic sealing for the damping pin and the back pressure valve function, static sealing for the cylinder cover, and mechanical sealing at the stop position. This offers crucial advantages over conventional systems:

Relevant market segments

Freudenberg Sealing Technologies Icon Agriculture

Agriculture

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Commercial Marine

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

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Construction

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

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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...

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Fluid Handling

Where's there's liquid, there are pumps and valves. And where there are pumps and valves, there are seals—where Freudenberg Sealing Technologies performs like no other...

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Fluid Power

Our customers already know they can depend on the quality and performance they get from Freudenberg Sealing Technologies: Whether it's in their hydraulic cylinders…

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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...

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Material Handling

Maximum uptime and minimal maintenance costs are key drivers for any material handling organization. Freudenberg Sealing Technologies’ innovative polyurethane...

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Recreational

In the Recreational market, the "Mega Trends" are global in scope, driven not only by consumer preference but by legislation as well. At Freudenberg…