Air Breather for housing vent.
Air Breather for housing vent.
(OP)
Hi guys,
I would like to know what is the significance of having an Air breather for pump (OH1) bearing housing vent? The means of lubrication is flooded. The pump vendor deviates to this requirement.
Appreciate all your input.
Thanks and Regards,
V.
I would like to know what is the significance of having an Air breather for pump (OH1) bearing housing vent? The means of lubrication is flooded. The pump vendor deviates to this requirement.
Appreciate all your input.
Thanks and Regards,
V.





RE: Air Breather for housing vent.
Johnny Pellin
RE: Air Breather for housing vent.
Is this "constant level bottle oiler" needed for an equalized oiler design?
Regards,
V
RE: Air Breather for housing vent.
Johnny Pellin
RE: Air Breather for housing vent.
Regardless of whether an oiler is fitted , the housing will "breath" as it heats up and cools down from start/stop operations. This breathing can pull in dust and moisture depending on where the pump is situated. Typically this will take the path of least resistance which is via the lip seal or labyrinth seal where the shaft exits the housing
There are 4 schools of thought about how to handle this.
1st school is that it doesn't matter much and I'll replace the bearings at every outage to compensate for the introduction of dust/moisture
2nd school is that I'll fit a breather to be the path of least resistance and filter out dust. In some cases people will fit combined breather/driers to handle moisture and dust.
3rd school is to hermetically seal the housing with mag based face seals (aka isomag or equivalent) and an expansion chamber to prevent over pressure.
4th school is the Heinz Bloch view that oil bath is evil and everything should be oil mist ;)
YMMV