Static seals

Static Seals

Cover seals


Our products in detail

FST Cover Seals Merkel Cover Seal PU 82

Merkel Cover Seal PU 82

One-piece, dual-action compact seal made of polyurethane. Internal sealing. High operating reliability and extrusion stability. Suited to existing O-ring installation spaces as well as those for O-rings with a back ring.

FST Cover Seals Merkel Cover Seal PU 83

Merkel Cover Seal PU 83

One-piece, dual-action compact seal made of polyurethane. Internal sealing. High operating reliability and extrusion stability. Suited to existing O-ring installation spaces as well as those for O-rings with a back ring.

FST Cover Seals Merkel Pinmatic

Merkel Pinmatic

One-piece, dual-action compact seal made of polyurethane to seal joint bolts. Internal sealing. Insensitive to pressure peaks.

FST Cover Seals Merkel Stircomatic

Merkel Stircomatic SRC

One-piece compact seal made of polyurethane for high operating pressures up to 80 MPa. High operating reliability and extrusion stability. Simple, secure mounting.

FST Cover Seals O-Ringe O-rings

O-Rings

Usage mainly for sealing stationary machine parts against liquid and gaseous media. Under certain conditions, their use as a dynamic sealing element is possible when the movements are axial, rotating and oscillating.

Related documents

Sales Sheets

Pdf

Merkel CoverSeal PU 82 is a single-piece, double-acting compact seal made of polyurethane for static sealing, internal sealing.

Pdf

Merkel CoverSeal PU 83 is a single-piece, double-acting compact seal made of polyurethane for static sealing, internal sealing.

Pdf

Merkel O-rings are widely used seals, preferably as static sealing elements.

Pdf

Merkel Stircomatic SRC is a single-piece compact seal made of polyurethane for static sealing, axially sealing component.

Operating pressure always looks for a way out

Cover seals from Freudenberg Sealing Technologies

Even if machine elements under pressure are firmly bolted to one another, there is still a so-called static seal gap that must be sealed. O-Rings – or O-Rings with back rings for improved extrusion stability – are most commonly used. If the requirements are more specialized, one-piece sealing elements made of polyurethane come into use. For example, the requirements may involve gaps for breathing due to major pipe expansion, short pressure rise times or alternating operating pressures. Freudenberg Sealing Technologies offers the most suitable cover seal for any application. They stand for the highest possible operating security and extrusion stability.

Simple and secure mounting

FST Merkel Cover Seals Deckeldichtungen PU 83
Polyurethane material offers outstanding characteristics relating to robustness and form stability – above all, to resist extrusion. As a result, even complex geometries can be manufactured with injection molding or even with turning technologies if a quick delivery is needed. This characteristic makes it possible to use one-piece seals. This especially offers an advantage during mounting since any potential inverted position – as in an O-rings/back ring combination – can be precluded. The profile rings are designed in such a way that they can even be substituted in existing installation spaces for O-ring/back ring systems (Fig. 1).
FST Merkel Pinmatic

The high linear force on the seal edges of polyurethane seals also enables their use in related applications. Merkel Pinmatic is produced with only slight changes in its geometry. It provides the best possible performance in virtually static applications such as knee lever systems or the bearing or joint bolts of injection molding machines (Fig. 2).

Relevant market segments

Freudenberg Sealing Technologies Icon Agriculture

Agriculture

Agricultural equipment is operated in extremely harsh conditions. Freudenberg Sealing Technology offers a wide range of sealing solutions such as cassette technology...

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 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 Fluid Power

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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Forming Machines

Strong forces with moderate movements, extremely variable forward and return stroke speeds, extremely short strokes at a high number of cycles – the operating...

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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 Mining

Mining

Safety is the highest priority when it comes to working underground. At the same time, operating efficiency plays a key role in this industry as well...

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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 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...