Mechanical shaft seal for R-FL.NU pump – works in FLYGT submersible pumps of the following models: Grindex MAXI 5154, 8107 H&N, MAXI 8107 LOW, FLYGT 2201-010, 2201-011 HT and MT, 2201-011 LT, 2201-080, -320, -430, -480, -590, -690, 3140 (except -980), 3152, 5540.