Sealing technology

Profile overview

Selection from our standard programme

Below you will find a selection from our range of sealing technology.

Elastomer seals

Durable solutions with manageable maintenance requirements and the lowest possible follow-up costs. Elastomers are characterised by their soft character.

Ramie yarn

High strength (high swelling and absorption resistance)
Resistant to abrasive media
Version: with a PTFE impregnation or as a version with PTFE-graphite compound; diameter: 4-25 mm (or on request); square or rectangular

PTFE Graphite yarn

Pressure resistant
Structurally strong and high section density
Non-combustible
Low coefficient of friction
Design: round, square or rectangular; diameter: 3-25 mm (or on request)

Novoloid

Good sliding properties
Heat conductive and pressure resistant
Resistant to cold and hot water
Design: rectangular or square shape; PTFE impregnation; diameter 4-30 mm
(or on request)

Aramid-PTFE-Graphite

Good sliding properties
Heat conductive and pressure resistant
Sensitive to UV radiation
Design: PTFE filled with graphite, core and edges are made out of arami; PTFE filled with graphite and aramid in rotation (zebra-meshwork)

Cellulose

Easy to maintain
High durability and absorbency
Resistant to cold and hot water, seawater, waste water, fats and oils
Design: rectangular or square, diameter 4-25 mm (or on request)

Graphite with Inconel reinforcement

Impregnation with corrosion inhibitor
Suitable as chambering ring
Wear resistant and gentle to shafts
Very flexible and adaptable
Design: rectangular or square, diameter: 4-25 mm (or on request)

Graphite gaskets

Oxidation resistant. Soft, particularly adaptable. Good chemical resistance
Long-term stable compression and recovery behaviour. Resistant to ageing.

Asbestos-free fibre quality

Asbestos-free plastic fibre. Extremely strong, almost unbreakable, and very resistant to acids or alkalis. Particularly heat and fire resistant, as fibres carbonise.

Individual production

Customised flat gaskets according to measurements/drawings. Possible manufacturing processes: Laser cutting
water jet cutting
plotting.

Silicone seals

Resistant to weathering, ozone and other external influences. Food-safe quality. Perfect for various seals and covers in different industries.

Sponge rubber seals

Weather-resistant quality seals and moulded parts made of sponge rubber. Made of EPDM in foamed quality with excellent sealing properties.

U-Cups

Can be used as rod or piston seals, depending on the design. In the symmetrical U-Cup design, can be used as rod and piston seals.

Wiper

Reliable protection against dirt, dust, moisture and other environmental influences.

Moulded parts

When the standard product is not sufficient or the application requires individual sealing solutions.

X-rings

When O-rings are no longer sufficient to seal dynamic connections, X-rings are used. The square profile of the ring-shaped seal prevents twisting and turning within the groove. Advantage: less wear.

Speedy Sleeve

Use: For repairing worn radial shaft seal running surfaces. Cost-effective alternative to replacing or reconditioning the used shaft. Used as a counterface to the rotary shaft seal.

Metal gaskets

Application wherever the use of plastic seals is not suitable. Materials: Soft iron, non-ferrous metals (copper, aluminium, brass, bronze), stainless steel, special grades.

V-rings

Elastic seals to prevent contamination of shaft seals or bearings.

Round cords

Round cords are also known as joint fillers or backfill cords. Static sealing. Various materials. High pressure elasticity. Temperature resistant.

Rotary shaft seals

Rotary shaft seals reliably seal rotating shafts. Due to the high demands on the condition of the seal, there are various versions, including a stainless steel spring or PTFE sealing lip, with an elastomer outer edge or metal housing.

Gammaring

For the external sealing of rotating shafts. Seals reliably against dust, grease, oil and other foreign bodies. Two functions: non-contact flinger ring as gap seal and rubber boot seal.

Moulded parts

Caps

For stable, secure and individual sealing of bores, bearings and shafts. Available in various designs and sizes.

O-rings

For a variety of applications: axial and/or radial sealing. Can be used for sealing very high pressures. Various materials, colours and sizes available.

Sealing materials

Depending on the application and mode of operation, different materials are used for the seals. Here is a list of the most common materials and their functions:

• HPU/PU (polyurethane) - Seals made of this material are very durable in terms of mechanical load, elasticity and gas tightness.
• NBR (acrylonitrile butadiene rubber) - Resistant to hydraulic oil and acid. Resistant to the effects of grease and petrol.
• FPM/FKM (Fluorocarbon rubber) - Resistant to mineral oils, acid, aromatic hydrocarbons.
• EPDM (ethylene propylene diene rubber) - Resistant to hot water and steam.
• Silicone - Robust against alcohols and ketones. Temperature resistant. 
• PTFE (Polytetrafluoroethylene) - Temperature resistant, low wear, robust. Little elasticity.
• POM (Polyoxymethylene) - High stiffness, low friction values, very good dimensional stability.
• PA (PA6 G) - Resistant to mineral oils, acids and diluted alkalis. Used in support and guide rings.
• Metal seals: In case of high or low temperatures, long service life, high radiation exposure, metal seals must be used instead of elastomer seals. In addition to the wire form, there are spring-elastic, metal-encased seals.

Materials: copper, aluminium, silver, gold, indium, stainless steel.