BUR 13


standard active back-up ring for piston seal type PD. normally already included in seal profiles, designed for automatic pressure activation. split and non split design available.


category of profile

machined only.

operating parameters & material

material temperature
 POM2 -50 °C … +100 °C
 PA -40 °C … +100 °C
 PTFE glass -200 °C … +260 °C

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

2 POM up to ø260 mm, PA above ø260 mm

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog…

tolerance value and surface finish according to corresponding seal data sheet

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.