Your pumping media is melted solid. It may be still hot when you are pumping.So the vapor pressure may further reduce the NPSHa. Changing the pump to a self priming type is the way to solve this issue.
Cheers,
Malith De Silva
Weir Minerals Australia Ltd
http://www.weirminerals.com
Guys, I would appreciate if someone can help on this, with the parts list including part numbers
What I require is the bearing part numbers which is the most critical as in my first post.
Net Positive Suction Head Calculation
NPSHr is the net positive suction head required by the pump which is a characteristic of the pump design. Varies from pump to pump and size. This is shown in the pump performance curve. NPSHr has to be < NPSHa for cavitation free pumping.
NPSHa is...
Looking at the damaged roller it is obvious that it failed due to spalling .. fatigue, stress under the bearing surface. Would have caused due to dynamic loads in excess of the designed loads. Manufacture of the bearing with respect to quality standard too contributes to this type of failures...
Do anyone know the OEM part numbers of the followings.
Holmes RBST-4 1020 over haul
10" Bearing Repair Kit containing :-
4 Main bearings,
2 location bearings,
4 main oil seals,
1 shaft seal,
4 Air deflector rings,
8 carrier locknuts,
2 flanged bras plugs c/w fibre washers
Many thanks...
