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Hi Iamp;#39;m Chad Wunderlich with Viking Pump and this is part three of our five part series on seals. Now last time I discussed O-Pro, Vikingamp;#39;s patented seal which offers an upgrade option to packing. But for some pumps especially small pumps like this the O-Pro seal is not an option. Today Iamp;#39;m going to talk about another simple seal option: lip seals. Youamp;#39;re watching the Pump Report. Lip seals are a simple, economical, and compact seal solution. Their narrow profile makes them easy to fit into small pumps and tight spaces. A lip seal consists of a flexible elastomeric lip in a rigid housing. The lip seal is stationary and the shaft rotates inside. An inboard spring helps to energize the lip and keep it in contact with the shaft while an outboard lip, called a wiper, prevents the ingress of contaminants from the outside environment. There are some limitations. Lip seals are not ideal for abrasive applications and they have mo