Seals,
sealing elements for hydraulics
and pneumatics

Gaskets – Standardized elements and custom CNC production

We offer a complete range of sealing components that are primarily used in hydraulic and pneumatic equipment, but we can also address the need for sealing in many other applications. In addition to a wide range of gaskets in standardized designs and dimensions, we are also engaged in CNC manufacturing and can produce custom gaskets exactly according to the requirement in a very short time.

SEALS FOR HYDRAULICS AND PNEUMATICS

Standard sealing elements

Seals used in hydraulics and pneumatics that are manufactured in standardized size ranges and materials. The advantage is the lower price due to the large-scale production. The disadvantage is often a lower availability of pieces and also a limited area of use.

To ensure maximum availability, we work closely with several leading European manufacturers and keep the most commonly used types and sizes in stock.

  • wiper rings, piston rings, piston seals, guide rings, static, rotary, pneumatic elements, bearings, o-rings, v-rings and many other sealing elements

  • we keep a large number of standard parts in stock for immediate collection

  • production according to UNI EN ISO 9001:2015 and IATF 16949, production process control according to DIN ISO 2859-1 AQL 1,5

  • we offer quantity discounts, customized warehouse and other benefits

SEALS – CUSTOM SEALING ELEMENTS

Our CNC seal production

In practice, there are cases when a standardized solution cannot be used for various reasons. For these situations we offer the possibility of our own CNC production. Production is possible from 1 piece without the need for mould costs etc. However, thanks to the automation features, we can also produce large series efficiently.

We keep a range of basic materials in stock to ensure that we are able to respond flexibly to urgent requirements or the need for piece quantities only.

  • production on a CNC machine up to a diameter of 500 mm (larger diameters in cooperation)

  • production of all hydraulic, pneumatic seals including atypical profiles and shapes

  • design of custom technical and material solutions according to application requirements

  • flexible and short delivery times thanks to our extensive stock of semi-finished products

  • production from rubbers, polyurethanes, PTFE (including filled variants) and plastics – more than 75 material variants on offer

OUR OTHER SERVICES, NOT ONLY IN THE FIELD OF HYDRAULIC SEALING

Hydraulic sealing elements – other services

Other services in the field of sealing elements for industrial applications are also an integral part of our offer

MEASUREMENT OF BUILDING SPACES, DESIGN OF SOLUTIONS

  • We will measure the necessary installation dimensions for the correct choice of seals and design the most suitable solution based on the operational requirements.

  • If it is not possible to use a standardized type, we will design and subsequently manufacture a custom element from a suitably selected material.

  • We carry out the measurement of buildings in our plant, but also directly at the customer’s plant

  • Recommendations for the design of sealing grooves and other functional surfaces

INSTALLATION OF HYDRAULIC AND OTHER SEALS

  • Installation and fitting of hydraulic sealing elements into the equipment

  • Recommendations for installation

  • Assistance in the installation of atypical solutions directly at the customer’s site

  • We also offer mounting kits, gauges and other accessories

HYDRAULIC CYLINDER OVERHAUL

  • We perform complete overhauls of hydraulic cylinders and other hydraulic equipment

  • In addition to the fitting or custom manufacturing of a new seal, we also (if the equipment is heavily worn) machine the metal parts of the equipment to ensure full functionality and service life.

  • We offer complete metalworking services, locksmithing, weldment fabrication and other related operations

SEALING ELEMENTS FOR OTHER INDUSTRIAL APPLICATIONS

  • Design and manufacture of sealing elements for other industrial applications

  • Sealing elements for water works

  • Sealing sleeves for flap and ball valves

  • Sealing of flanges, lids, caps, expansion joints and other elements

  • Atypical applications and custom solutions

HYDRAULIC SEALS – OUR PRODUCTION

Seal production – product demonstrations and our CNC production

Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
Těsnění hydraulika výroba
ISO 9001
Our quality guarantee

Our company has obtained the EN ISO 9001:2016 certificate . Not only in the production of seals for hydraulics we follow the principles of this certification
and thanks to this we can bring our customers a level of products and services that meets the strictest quality requirements.

SEALS IN THE HYDRAULIC CYLINDER

Seals for hydraulic applications – a basic overview of our offer

Těsnění - Hydraulický válec
WIPER RINGS

  • The wiper ring protects the inner part of the hydraulic cylinder from dirt, dust and moisture from the outside environment.

  • An important sealing element that significantly increases the life of other sealing and guiding elements.

PROFILES MANUFACTURED BY US
Wiper ring
DA101
Wiper ring
DA102
Wiper ring
DA103
Wiper ring
DA104
Wiper ring
DA105
Wiper ring
DA106
Wiper ring
DA107
Wiper ring
DA108
Wiper ring
DA109
Wiper ring
DA109B
Wiper ring
DA211
Wiper ring
DA212
Wiper ring
DA113
Wiper ring
DA213
Wiper ring
DA114
Wiper ring
DA115
Wiper ring
DA116
Wiper ring
DA117
Wiper ring
DA118
Wiper ring
DA119
STANDARD SEALS

In the offer of the so-called standard seals (production by injection moulding) you can find 14 other types, including wiper rings made of metal.

Please contact us for detailed technical information on each type (maximum operating pressure, temperature, speed, etc.).

PISTON ROD SEAL

  • The seal that closes the cylinder. Its purpose is to prevent leakage of the medium from the device into the open space or into another part of the device.

  • Primarily designed for sliding movements or in combination with slight rotation. It is located in the cylinder head and seals the movement of the piston rod on the inner blade.

PROFILES MANUFACTURED BY US
Wiper ring
DS101
Wiper ring
DS102
Wiper ring
DS102R
Wiper ring
DS103
Wiper ring
DS104
Wiper ring
DS105
Wiper ring
DS106
Wiper ring
DS107
Wiper ring
DS109
Wiper ring
DS110-112
Wiper ring
DS116
Wiper ring
DS117
Wiper ring
DS117R
Wiper ring
DS118
Wiper ring
DS119
Wiper ring
DS120
Wiper ring
DS121
Wiper ring
DS124
Wiper ring
DS125
Wiper ring
DS126-128
Wiper ring
DS129
Wiper ring
DS130
Wiper ring
DS131
Wiper ring
DS138
Wiper ring
DS139
Wiper ring
DS141
Wiper ring
DS142
Wiper ring
DS151
Wiper ring
DS154
Wiper ring
DS199
Wiper ring
DS205
Wiper ring
DS216
Wiper ring
DS238
STANDARD SEALS

The range of standard piston rod seals (injection moulding) comprises a further 17 types. An overview of these can be found in the catalogue below.

Please contact us for detailed technical information on each type (maximum operating pressure, temperature, speed, etc.).

THE FIST’S FATHER

  • This is usually the main active sealing element. Transmits the pressure caused by the used media to the sliding motion of the piston rod and other downstream parts of the machine

  • It is mounted on the piston and seals the movement on the outer edge, in the cylinder.

PROFILES MANUFACTURED BY US
Wiper ring
DK101
Wiper ring
DK102
Wiper ring
DK102R
Wiper ring
DK103
Wiper ring
DK104
Wiper ring
DK104R
Wiper ring
DK105
Wiper ring
DK106
Wiper ring
DK107
Wiper ring
DK108
Wiper ring
DK109
Wiper ring
DK109D
Wiper ring
DK109H
Wiper ring
DK109N
Wiper ring
DK110-112
Wiper ring
DK116
Wiper ring
DK117
Wiper ring
DK118
Wiper ring
DK119
Wiper ring
DK120
Wiper ring
DK122
Wiper ring
DK123
Wiper ring
DK123D
Wiper ring
DK123H
Wiper ring
DK123N
Wiper ring
DK124
Wiper ring
DK125
Wiper ring
DK126
Wiper ring
DK127
Wiper ring
DK128
Wiper ring
DK129
Wiper ring
DK138
Wiper ring
DK139
Wiper ring
DK140
Wiper ring
DK141
Wiper ring
DK142
Wiper ring
DK143
Wiper ring
DK144
Wiper ring
DK145
Wiper ring
DK150
Wiper ring
DK151
Wiper ring
DK153
Wiper ring
DK154
Wiper ring
DK199
Wiper ring
DK205
Wiper ring
DK216
Wiper ring
DK222
Wiper ring
DK238
STANDARD SEALS

The range of standard piston rod seals (injection moulding) comprises a further 16 types. An overview of these can be found in the catalogue below.

Please contact us for detailed technical information on each type (maximum operating pressure, temperature, speed, etc.).

LEADING CIRCLES

  • Their purpose is to define the clearance between the piston and cylinder or piston rod and head.

  • They increase the mechanical resistance of the seals, prevent abrasion of the seals and reduce friction in the equipment.

PROFILES MANUFACTURED BY US
Wiper ring
DF101
Wiper ring
DF102
Wiper ring
DF103
Wiper ring
DF104
Wiper ring
DF105
Wiper ring
DF106
Wiper ring
DF107
Wiper ring
DF108
Wiper ring
DFB102
STANDARD SEALS

The following types of standard seals (injection moulding) are available:

Please contact us for detailed technical information on each type (maximum operating pressure, temperature, speed, etc.).

BACK RINGS

  • The retaining rings (usually made of plastic) act as reinforcements that increase the pressure and mechanical resistance of O-rings and other seals.

  • They also prevent the seal from entering the joint at larger clearances in the device.

PROFILES MANUFACTURED BY US
Wiper ring
DST108
Wiper ring
DST109
Wiper ring
DST110
Wiper ring
DST111
Wiper ring
DST112
Wiper ring
DST113
Wiper ring
DST114

Please contact us for detailed technical information on each type (maximum operating pressure, temperature, speed, etc.).

STATIC SEALING
  • Static sealing elements designed to seal non-moving parts.

  • They are primarily used for sealing flanges and cylinder heads.

PROFILES MANUFACTURED BY US
Wiper ring
DFL101
Wiper ring
DFL102
Wiper ring
DFL103
Wiper ring
DFL104
Wiper ring
DFL105
Wiper ring
DFL106
Wiper ring
DFL107
Wiper ring
DFL108
Wiper ring
DFL109
Wiper ring
DFL110
Wiper ring
DFL111
Wiper ring
DFL112
STANDARD SEALS

The following types of standard seals (injection moulding) are available:

O-CIRCLES

  • Circular sealing elements used for a wide range of static and, to a limited extent, dynamic applications.

  • They are designed to prevent unwanted permeation or loss of liquid or gas.

  • Materials offered: NBR, FPM, MVQ, CR, EPDM

  • Metric and inch sizes according to PN 02 9280, PN 02 9281, PN 02 9282 and PN 02 9283 standards .

  • We custom manufacture atypical and non-standard dimensions.

  • Download a detailed catalogue of our O-rings offer HERE

FEP/PFA SHEATHED O-RINGS

  • Sheathed O-rings are a special type of classic O-ring.

  • They consist of an elastic core made of FPM (Viton) or MVQ (Silicone) and an outer sheath made of FEP or PFA.

  • Use wherever high chemical and temperature resistance is required and an O-ring made of conventional elastomers cannot be used.
  • FEP Teflon outer jacket can be used for applications in the temperature range -60°C to +205°C

  • Temperature resistance up to -60°C to +260°C using PFA core

  • Download a detailed catalogue of our O-rings offer HERE

FFKM O-rings

  • The most durable material for the manufacture of O-rings and other sealing elements

  • It combines the elastic properties of rubber with exceptional chemical and temperature resistance.

  • FFKM is designed for wherever the most demanding requirements are placed on the material.

  • The material exhibits excellent resistance to acids, amines, alkalis, as well as chlorine- and solvent-containing media.

  • At the same time, it has excellent temperature resistance, where the standard compound can be used up to 270°C. The most thermally resistant compound available can be applied for temperatures up to 330°C (short term up to 350°C).

  • Elastomer is available in more than 20 different variants in hardnesses from 60 to 90 Sh.A.

  • Detailed catalogue of our O-rings from FFKM can be found here

OTHER TYPES OF STATIC SEALS

ROTARY SEALS
  • Sealing elements designed to seal rotary motion

  • These are mainly various motors, rotary converters, distributors, joints and similar devices.

PROFILES MANUFACTURED BY US
Wiper ring
DR101
Wiper ring
DR102
Wiper ring
DR103
Wiper ring
DR104
Wiper ring
DR105
Wiper ring
DR106
Wiper ring
DR107
Wiper ring
DR108
Wiper ring
DR109
Wiper ring
DR110
Wiper ring
DR111
Wiper ring
DR112
Wiper ring
DR113
Wiper ring
DR115
Wiper ring
DR116
Wiper ring
DR117
Wiper ring
DR118
Wiper ring
DR119
Wiper ring
DR121
Wiper ring
DR201
Wiper ring
DR202
Wiper ring
DR203
Wiper ring
DR204
Wiper ring
DR205
Wiper ring
DR206
Wiper ring
DR207
STANDARD SEALS

The following types of standard seals are available:

SHAFT SEALS – SHAFT SEALING ELEMENTS

  • designed for sealing rotating shafts and other machine parts.

  • They provide a tight separation of two environments of the same or different nature with a small pressure gradient.

  • The degree of sealing depends on the operating conditions of the component to be sealed and the lifetime requirements of the seal.

  • The bearings are standardized according to PN 02 9403 or DIN 3760, DIN 3761.

  • We offer a large number of types and variants

  • A detailed catalogue of our offer can be downloaded HERE

How does CNC seal production work?

The video shows the production of a 330 mm diameter sealing sleeve made of H-PU 95 Sh.A Polyurethane.

HYDRAULIC SEALS
Materials used for production

We use a wide range of materials to produce seals.
These include H-PU, NBR, FPM, EPDM, POM, PTFE and others.

Below you will find an overview and basic properties of a few selected materials. However, we offer more than 80 material variants. We select the material according to the requirements of the application, taking into account operating temperature, pressure, chemical environment and other parameters. We also offer materials with FDA approvals and certifications that can be used in e.g. in the food or pharmaceutical industry.

Detailed technical data sheets for all materials are available on request.

MateriálTvrdostTeplotaPopis a použití
H-PUPolyuretan HPU, FDA
červený		95 ± 2 °Sh.A-20 ÷ 115 °CUniverzální materiál, který vyniká svými mechanickými vlastnostmi, odolností vůči opotřebení, teplotám a výbornou obrobitelností.
Ve vodě odolný hydrolýze. Vhodný pro minerální oleje a tlakový vzduch.
H-PU žlutéPolyuretan HPU 55D
žlutý		55 ± 3 °Sh.D-20 ÷ 115 °CUniverzální materiál, který vyniká svými mechanickými vlastnostmi,
zvýšenou odolností vůči opotřebení, teplotám a výbornou obrobitelností.
Ve vodě odolný hydrolýze. Vhodný pro minerální oleje a tlakový vzduch.
NBRPolyuretan SL-PU
černý		96 ± 2 °Sh.A-20 ÷ 110 °CMazivy plněný polyuretan s výbornými mechanickými vlastnostmi a odolností vůči opotřebení. Díky obsahu maziva je zvláště vhodný pro aplikace s omezením mazáním (např. suché pneumatické použití)
NBRPryž NBR 85
černá		85 ± 5 °Sh.A-30 ÷ 110 °CPryž odolná minerálním olejům, palivům, rostlinným a živočisným tukům, HFA, HFB a HFC-kapalinám. Disponuje výbornými elastickými vlastnostmi. Není dlouhodě odolná povětrnostním vlivům a ozonu.
FDAPryž NBR 85 FDA
bílá		85 ± 5 °Sh.A-30 ÷ 110 °CPryž NBR bílé barvy s atestem FDA pro použití např. v potravinářství.
Odolná minerálním olejům, palivům, rostlinným a živočisným tukům, HFA, HFB a HFC-kapalinám. Výborné elastické vlastnosti.
HNBRPryž H-NBR 85
zelená		85 ± 5 °Sh.A-20 ÷ 150 °CPryž NBR se zvýšenou odolností vysokým teplotám a navýšenou otěruvzdorností. Odolná minerálním olejům, palivům, rostlinným a živočisným tukům, HFA, HFB a HFC-kapalinám. Výborné elastické vlastnosti.
NBRPryž EPDM 85
černá		85 ± 5 °Sh.A-45 ÷ 130 °CPryžový materiál s výbornou odolností záporným teplotám, stárnutí a povětrnostním vlivům. Odolný alkoholům, alkáliím, kyselinám a dalším látkám. Nevhodný pro ropné produkty, tuky a oleje.
FDAPryž EPDM 82 FDA
bílá		82 ± 5 °Sh.A-45 ÷ 130 °CPryž EPDM bílé barvy s atestem FDA pro použití např. v potravinářství. Materiál s výbornou odolností záporným teplotám, stárnutí a povětrnostním vlivům. Odolný alkoholům, alkáliím, kyselinám a dalším látkám.
FPMPryž FPM
hnědá		82 ± 5 °Sh.A-20 ÷ 220 °CMateriál s velmi vysokou teplotní odolností a výbornou chemickou odolností i proti agresivním chemikáliím. Nevhodná pro použití u horké vody.
VMQPryž Silikon
modrá		85 ± 5 °Sh.A-60 ÷ 200 °CPryžový materiál s výbornou teplotní odolností, vysokou flexibilitou i při nízkých teplotách a odolností vůči atmosferickým vlivům a stárnutí. Nulový vliv na chuť i vůni média - často využíván v potravinářství.
FDAPryž Silikon FDA
bílá		85 ± 5 °Sh.A-60 ÷ 200 °CSilikonová pryž v bílé barvě s atestem FDA. Pryžový materiál s výbornou teplotní odolností, vysokou flexibilitou i při nízkých teplotách a odolností vůči atmosferickým vlivům a stárnutí. Nulový vliv na chuť i vůni média.
FDAPTFE virgin
bílá		55 ± 3 °Sh.D-200 ÷ 260 °CMateriál s výjimečnou chemickou a teplotní odolností a výbornými kluznými vlastnostmi. Má atest FDA a lze tak použít v potravinářství. Nejčastěji je využíván pro vodící a opěrné kroužky.
PTFE + 40% bronz
hnědá		60 ± 3 °Sh.D-200 ÷ 260 °CPTFE plněný ze 40% bronzem. Díky této přímesi je dosaženo zvýšené pevnosti tlaku, tepelné vodivosti a vyšší odolnosti extruzi. Jde o nejčastěji používanou PTFE směs pro výrobu hydraulického těsnění.
PTFE + uhlikPTFE + 25% uhlík
šedá		65 ± 3 °Sh.D-200 ÷ 260 °CPTFE plněný z 25% uhlíkem. Příměs uhlíku zvyšuje tvrdost, odolnost proti tečení, otěruvzdornost a tepelnou vodivost materiálu.
Částečně samomazný.
PTFE PEEK
béžová		60 ± 3 °Sh.D-200 ÷ 260 °CPTFE plněný z 10% PEEK. Výborná odolnost otěru a extruzi, zvláště v aplikacích s minimem maziva. Materiál má FDA atest.
FDAPOM
bílá		81 ± 3 °Sh.D-45 ÷ 100 °CMateriál s výbornými mechanickými vlastnostmi, vysokou tvrdostí, tvarovou stálostí a velkou odolností otěru.
Využíván především pro výrobu opěrných a vodících kroužků.
FDAPA
bílá		79 ± 3 °Sh.D-40 ÷ 110 °CPolyamid PA vyniká mechanickými vlastnostmi, otěruvzdorností a kluznými vlastnostmi. Nevýhodou je poměrně vysoká nasákavost vodou.
FDAPE-UHMW
bílá		61 ± 3 °Sh.D-200 ÷ 80 °CVysokomolekulární polyetylen je materiál s vysokou odolností otěru, opotřebení a dobrými kluznými vlastnostmi. Výborná odolnost záporným teplotám.
SEALS FOR HYDRAULICS AND PNEUMATICS
Seal design and mechanics

When designing a solution, several factors must be taken into account to determine the ideal choice of profile and material.

These include pressure, temperature, velocity, chemical environment, friction, the way the functional surfaces are treated and other factors.
Based on these factors, we select the sealing element that ideally meets the requirements of the application and guarantees a high sealing effect and durability.

Requirements for the quality of functional areas

Particular attention should be paid to the surface design of the functional surfaces.

The purpose is to ensure a surface quality that minimizes abrasion and wear on the seal.

The piston rod seal, which seals against the moving surface, can be damaged by fine abrasive particles which may adhere to the rough surface. Therefore, the bars should have a low surface roughness value, and the surface should be similar to hard chrome and rust-proof. The ideal surface roughness is somewhere around 0.3 µm (Ra) or 2.3 µm (Rt).

The piston seal, which seals against the inner surface of the cylinder, is not exposed to the same range of abrasive particles entering from the atmosphere and can therefore handle rougher surfaces. The ideal surface roughness is somewhere around 0.5 µm (Ra) or 3.7 µm (Rt). The operating pressure must be taken into account when assessing the surface properties. At higher operating pressures, the film between the seal and the sealing surface is thinner and friction is greater. Under such operating conditions, the smallest possible surface roughness should be selected.
The surface quality for static sealing should be around 1 µm (Ra) or 7 µm (Rt).

Detailed information on construction, design and other technical information can be found in our catalogue.

For more information on hydraulic seals, see, for example, this source.
For general information on the function of the hydraulic cylinder and how to solve its sealing, see, for example, this link or this video.

CONTACT

Are you interested in our offer?

If you have any requirement for technical plastic or a product made from it, we would be happy to be contacted.
We will be happy to discuss everything with you and prepare a non-binding quotation based on the documents.

If you are interested, please contact us at one of the contacts listed here or via the contact form.