Shaft seal, which way around?

[cat007]

Installing one of these onto a pump:



Do you put the side with the spring facing the water or oil, or facing the outside world?

Cheers

[iOnic]

Closed/flat side = outside world. Spring = inside.

[cat007]

Thanks!

[RunningRich]

Generally you should be able to read the text on any seal like this once installed. Generally...

Don't forget a little appropriate lubricant in the bore. These lip seals work by having the higher liquid pressures squishing the rubber down onto the shaft. Zero lube will cause wear.