"Bullwinkle, that trick never works. Why don't you figure out how to make hydraulic roller lifters survive big spring pressure." Like Bullwinkle, hydraulic roller lifters get no respect. It appears ...

Mike O'Brien; Brooks, KY:I have a question on oiling systems regarding the difference between a high pressure oil pump and a high volume oil pump. Assuming the oil pump is working fine and pumping to ...

As the cost of components and pumps becomes more affordable, variable speed pumps are being used to increase the efficiency and reliability of water distribution systems in multi-story buildings.