This Dowty Seal (Part #4088022) is a replacement part made for two popular Pfeiffer pump models: the UNO 1.5A and the DUO 1.5A . A Dowty seal is a special type of seal. It has a rubber ring bonded to a metal outer ring. This design creates a very tight, reliable seal that stops oil from leaking out and air from getting in . If you are rebuilding your small Pfeiffer pump or fixing a leak, this is exactly the part you need.
This Shaft Seal (Part #4083174) is a replacement part made for two popular Pfeiffer pump models: the UNO 1.5A and the DUO 1.5A . Its main job is to seal the rotating shaft where it enters the pump body. This stops oil from leaking out and keeps air from getting in. If you are rebuilding your small Pfeiffer pump or fixing a leak, this is the part you need. It is also known by the cross-reference number SV0004 and is included in the official repair kit for these pumps .
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