Back-Up Rings

reduce the sealing gap between two components, protect the sealing element (e.g. an O-ring) and thus increase its service life. Depending on the application, we provide different shapes and materials.

Back-Up Rings

Back-up rings reduce the sealing gap between components and thus prevent damage to the seal due to gap extrusion. They are used together with O-rings as well as other sealing elements. Their use extends the service life of the seal. Back-up rings are used for higher pressures, pulsating pressures or larger sealing gaps. They are also used in the case of vibrations and higher speeds as well as higher operating temperatures and in cyclical applications.

Back-up rings can be manufactured serially in various profile geometries in PTFE, POM, PA and, for special applications, also in PEEK, PET, PCTFE, PTFE compounds, etc. Standard and special dimensions are also available in elastomer materials. In a concave design, the O-ring is centred in its installation position, and can thus be subjected to higher loads. A trapezoidal back-up ring design is chosen for higher pressure loads and larger sealing gaps. Back-up rings can also be supplied in a slotted design to facilitate installation.

Stützring EE0

Back-Up Ring EE0

Back-up ring, one layer, continuous.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES0

Back-Up Ring ES0

Back-up ring, one layer, slotted.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE1

Back-Up Ring EE1

Back-up ring, one layer, continuous, concave. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES1

Back-Up Ring ES1

Back-up ring, one layer, slotted, concave. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE2

Back-Up Ring EE2

Back-up ring, trapezoid, one layer, continuous, for external sealing applications. Trapezoid back-up rings reduce the sealing gap with their shape and permit higher system pressures.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES2

Back-Up Ring ES2

Back-up ring, trapezoid, one layer, slotted, for external sealing applications. Trapezoid back-up rings reduce the sealing gap with their shape and permit higher system pressures.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE3

Back-Up Ring EE3

Back-up ring, trapezoid, one layer, continuous, for internal sealing applications. Trapezoid back-up rings reduce the sealing gap with their shape and permit higher system pressures.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES3

Back-Up Ring ES3

Back-up ring, trapezoid, one layer, slotted, for internal sealing applications. Trapezoid back-up rings reduce the sealing gap with their shape and permit higher system pressures.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE4

Back-Up Ring EE4

Back-up ring, one layer, continuous, inside chamfer.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES4

Back-Up Ring ES4

Back-up ring, one layer, slotted, inside chamfer.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE5

Back-Up Ring EE5

Back-up ring, one layer, continuous, outside chamfer.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES5

Back-Up Ring ES5

Back-up ring, one layer, slotted, outside chamfer.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE6

Back-Up Ring EE6

Back-up ring, one layer, continuous, concave, inside chamfer. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES6

Back-Up Ring ES6

Back-up ring, one layer, slotted, concave, inside chamfer. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EE7

Back-Up Ring EE7

Back-up ring, one layer, continuous, concave, outside chamfer. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring ES7

Back-Up Ring ES7

Back-up ring, one layer, slotted, concave, outside chamfer. The shape of the O-ring is retained approximately, as a result of which higher stresses are possible.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -50 °C / +100 °C
Standard Material: POM

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring SP1

Back-Up Ring SP1

Back-up ring, spiral shaped, for internal sealing applications.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring SP2

Back-Up Ring SP2

Back-up ring, spiral shaped, for external sealing applications.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -100 °C / +200 °C
Standard Material: PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EEP

Back-Up Ring EEP

Back-Up Ring EEP, endless, concave, measures for combination with o-rings according to ASA 568.
Depending on one-sided or alternating pressurisation, one or two back-up rings are used. For details on groove sizing (groove width L), please refer to our application catalogue or contact our application technology department.

Application Range
Temperature: -55 °C / +110 °C
Standard Material: NBR

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

Stützring EEM

Back-Up Ring EEM

Elastic, endless back-up ring with redeformation after installation at the groove bottom. For supporting o-rings in static applications. Safe against twisting and shearing.

Application Range
Temperature: -30 °C / +200 °C
Standard Material: mod. PTFE

Other materials are available for very high or very low operating temperatures. For detailled information, please look at the specific PDF catalogue or contact our application engineers.

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