Pfeiffer Balzers Oil Fluid Lubricant Felt Reservoir with O-Ring for Turbomolecular High Vacuum Pumps TPH/U 020, 040, 050, 060, 062, 065 and O71P. The lubricant reservoir should be replaced at least every three years. Where extreme operating conditions or unclean processes are involved, the replacement should occur more frequently. See AVAILABLE DOWNLOADS PDF below for replacing Oil Fluid Lubricant Reservoir. Pfeiffer Part Number PM 103 593 AT

Please Note: This item may need to be modified to fit the First Generation TPH 050 pumps. Will work with no modification for Second Generation TPH 050 pumps.