Replacement PTFE back-up ring for the male half of PLT DN25 couplings.
PTFE back-up ring for the male half of PLT quick couplings in size DN25.
The back-up ring works next to the sealing O-ring and stops it being pushed into the clearance when the coupling is under pressure. When the coupling starts to leak or weep oil at the connection, the back-up ring and the O-ring are normally replaced together.
Before ordering, check the coupling series and size (PLT DN25) and that you need the ring for the male half.
Specific References
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