Piston Seals

It is usually the main active sealing element. It transfers pressure caused by the medium to the reciprocating movement of the piston rod and other connected machine parts. It is mounted on the piston and seals movement on the outer lip, within the cylinder.

Profiles We Manufacture

DK101
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK102
Pressure
700 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK102R
Pressure
700 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK103
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 0.5 m/s
DK104
Pressure
700 bar
Temperature
-30 / 110 °C
Speed
max 0.5 m/s
DK104R
Pressure
700 bar
Temperature
-30 / 110 °C
Speed
max 0.5 m/s
DK105
Pressure
25 bar
Temperature
-20 / 115 °C
Speed
max 1 m/s
DK106
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK107
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK108
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK109
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK109D
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK109H
Pressure
1500 bar
Temperature
-20 / 115 °C
Speed
max 0.3 m/s
DK109N
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK110 - 112
Pressure
500 bar
Temperature
-20 / 115 °C
Speed
max 0.7 m/s
DK116
Pressure
160 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK117
Pressure
250 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK118
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK119
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK120
Pressure
700 bar
Temperature
-30 / 110 °C
Speed
max 0.5 m/s
DK122
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK123
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK123D
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK123H
Pressure
1500 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK123N
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK124
Pressure
500 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK125
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK126
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK127
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.4 m/s
DK128
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK129
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK138
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK139
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK140
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 1 m/s
DK141
Pressure
400 bar
Temperature
20 / 115 °C
Speed
max 1 m/s
DK142
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK143
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s
DK144
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 2 m/s
DK145
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 3 m/s
DK150
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK151
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK153
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK154
Pressure
160 bar
Temperature
-200 / 260 °C
Speed
max 15 m/s
DK199
Pressure
400 bar
Temperature
-20 / 115 °C
Speed
max 0.4 m/s
DK205
Pressure
25 bar
Temperature
-20 / 115 °C
Speed
max 1 m/s
DK216
Pressure
160 bar
Temperature
-20 / 115 °C
Speed
max 0.5 m/s
DK222
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 1.5 m/s
DK238
Pressure
400 bar
Temperature
-30 / 110 °C
Speed
max 10 m/s

Standard Seals

The offer of standard rod seals (produced by injection molding) includes 16 more types. You can find their overview in the catalog below. For detailed technical information on individual types (maximum operating pressure, temperature, speed, etc.), please contact us.

Download Catalog

Housings and Designs

The installation space for piston seals typically takes the form of a wider groove. For so-called omega seals, which combine PTFE+Bronze and NBR, the installation takes the form of a deep and narrow groove.

When designing and creating installation spaces for piston seals, it is necessary to follow recommendations that are generally valid for the construction of sealing elements. In particular, it is necessary to maintain the surface roughness of the sealing groove at Ra ≤ 1.6μm and Rt ≤ 6.3 μm and to check before assembly that the sealing groove is cleaned of possible impurities and that there are no sharp edges, burrs, or other surface imperfections in the given place. It is also necessary to maintain the recommended size of the lead-in edge in the cylinder. Otherwise, the sealing lips may be damaged during assembly.

Installation space for standard piston seals.
Higher installation for PTFE + NBR combined sealing elements.

Our Manufacturing Capabilities

Thanks to our technological equipment, we can manufacture sealing elements (and more) up to an outer diameter of 505 mm. However, in cooperation with verified international partners, we can also offer seals of significantly larger diameters.

We maintain a large stock of basic materials, from the smallest sizes up to diameters exceeding 500 mm. This enables us to respond flexibly to urgent requests. We typically manufacture seals within a few days, but in case of need (e.g., breakdowns, urgent repairs of hydraulic equipment), we can produce seals virtually on demand.

We manufacture sealing elements starting from a single piece. However, thanks to the automation elements we utilize in production, we can also efficiently produce large series. We use a wide range of machining tools specifically developed for manufacturing seals and machining specific sealing materials. This enables us to produce many non-standard profiles and shapes, or to perform shape and dimensional modifications of standard profiles.

Manufacturing Materials

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Our Quality Guarantee

In all areas of our operations, we place great emphasis on maximum quality of products and services, responsible approach to the environment, and work safety. We believe that these values are the foundation for long-term development and for building stable relationships with our customers. The confirmation of the quality of our work is the fact that we hold the ČSN EN ISO 9001:2016, ISO 14001:2016, and ISO 45001:2018 certifications.

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