Originally Posted by
Gaspar
From my experience having got the "leaking" issue over the years in diferent customers, there is one detail that no one commented, and it is that the 4mm tube and 5/32 tube are apparently similar, same 1/4" tube and 6mm tube. I have seen festos "leaking" just because the customer mixed imperial and metric sizes. This, plus the badly cut ends, plus some brands of fast fittings or tubing that degrade quickly when used in Kero, have created the "urban mith". Festo brand with quality Festo tube, installed correctly is OK, other brands not.
Gaspar
Spot on Gaspar, and with respect I did mention the issue of correct tubing in an earlier post. Festo tubing for Festo QS and QSM fittings,or there may be a slight mismatch.
The doubters should read page 9 of the Festo data sheets for QS and QSM push in connectors, all are rated at MINUS .95 bar.
Incidentaly my Merlin 100 is running just superbly, including the Festo on the suction side of the fuel system, brilliant engine!
David.