If you are in the market for a new sludge pump, it is time to consider an alternative positive displacement pump design.
Are you in the market for a new sludge pump because your current positive displacement pump has leaky seals, runs dry then breaks down, clogs often, needs frequent maintenance or is too complicated to repair? If so, then it is time to consider an alternative positive displacement pump design.
This article in WaterWorld discusses pros and cons of various pumps designs as well as application examples.