The PERMAFLEXX flat gasket
- the PERMAFLEXX seal is permanently elastic
- In contrast to conventional foam rubber seals, the PERMAFLEXX seal only has a very small loss of restoring force – even after years
- it has the fastest recovery properties to compensate for the impulses of a pulsating cleaning and the associated load changes
We measured it:
Test of an EPDM seal
- the seal is compressed
- the back pressure rises to -94N
- Compression is maintained, over time the back pressure of the seal drops from -94N to -21N
- when the compression is released, the seal loses contact with the pressure plate
Test of the PERMAFLEXX seal
- the seal is compressed
- the back pressure rises to -142N
- Compression is maintained, over time the back pressure of the seal drops from -142N to -122N
- when the compression is released, the seal maintains contact with the pressure plate
This is how it was measured:
- A) the seal is placed in the testing device
- B) the upper punch moves down, the measurement starts with contact between the upper punch and the seal
- C) the upper punch compresses the seal at a defined distance from the lower punch for a fixed period of time. As a rule, the seal loses its restoring force during this compression period
- D) the upper punch moves up and releases the compression