Back-up Rings

Back-up rings increase the compressive strength of O-ring sealing systems and prevent the sealing material from being extruded into the sealing gap. Available with a rectangular or concave cross-section, as well as in continuous, slotted, or spiral designs—for reliable sealing even at high pressures.

standard dimensions

Profile

Reference

Pressure

Temperature
(°C)

Speed
(m/s)

Material

Dimensions
(mm)

Catalog

Reference

STM-metric

Pressure

500

Temperature

(°C)

-30/+110

Speed

(m/s)

–

Material

TPE Polyester
55 Sh D

Dimensions

(mm)

4 … 250

Reference

STI-inch

Pressure

500

Temperature

(°C)

−30/+110

Speed

(m/s)

–

Material

TPE Polyester
55 Sh D

Dimensions

(mm)

7 … 300

Reference

STI-NBR

Pressure

400

Temperature

(°C)

−30/+110

Speed

(m/s)

–

Material

NBR 90 Sh A

Dimensions

(mm)

4 … 660

Reference

STI-FPM

Pressure

400

Temperature

(°C)

−20/+200

Speed

(m/s)

–

Material

FPM 90 Sh A

Dimensions

(mm)

4 … 660

Reference

STS

Pressure

500

Temperature

(°C)

−200/+260

Speed

(m/s)

–

Material

PTFE

Dimensions

(mm)

3 … 400

Reference

STN

Pressure

500

Temperature

(°C)

−200/+200
−30/+100
−40/+110

Speed

(m/s)

–

Material

PTFE
PA
POM

Dimensions

(mm)

8 … 418

Reference

STNG

Pressure

500

Temperature

(°C)

−200/+200
−30/+100
−40/+110

Speed

(m/s)

–

Material

PTFE
PA
POM

Dimensions

(mm)

17 … 177

Custom-made

Profile

Reference

Pressure

Temperature
(°C)

Speed
(m/s)

Material

Dimensions
(mm)

Catalog

Reference

STE

Pressure

500

Temperature

(°C)

−200/+260

Speed

(m/s)

–

Material

PTFE-Comp., PA,
POM PU, TPE,
NBR, TNBR

Dimensions

(mm)

8 … 418

Reference

STG

Pressure

500

Temperature

(°C)

−200/+200

Speed

(m/s)

–

Material

PTFE-Comp.

Dimensions

(mm)

17 … 177

Reference

STE/kv

Pressure

400

Temperature

(°C)

−30/+110

Speed

(m/s)

–

Material

PTFE,NBR
POM,PA
PU,TPE

Dimensions

(mm)

4 … 660

Reference

STS

Pressure

500

Temperature

(°C)

−200/+260

Speed

(m/s)

–

Material

PTFE virgin

Dimensions

(mm)

3 … 400

XS Profiles

Profile

Reference

Pressure

Temperature
(°C)

Speed
(m/s)

Material

Dimensions
(mm)

Catalog

Reference

Pressure

500

Temperature

(°C)

−30/+80

Speed

(m/s)

0,5

Material

Dimensions

(mm)

3 … 400

Reference

XS-AK

Pressure

500

Temperature

(°C)

−40/+120

Speed

(m/s)

0,8

Material

Dimensions

(mm)

25 … 200