Recent content by discreet544

Hi Folks; I am developing a series of pump performance curves for pulp slurries. I am running a closed-loop Lab-Scale pipeline facility. My question is about measuring head vs. flow rate at constant RPMs. I did it for pure water by continuously feeding the system with water, and gradually...

The discharge pressure is a few cm ahead of discharge valve ! The loop is all horizontal !

Also I changed the suction hose !

Today I spent $4000 to change all the pump impeller and plates and sealings and orings and ... But the problem is still there ! OMG ! I am getting crazy ! I can make the same velocity, but not the same pressure ! Even for pure water ! I am now in a real trouble ! I can't make any more guess ! Is...

Sure not ! I've check step by step all the line. it is completely clean and transducer's are also fine; no clogging ! Within 1 week, pressures suddenly dropped ! While the velocities are still the same. It is obviously violating Bernuli's law !

Hi Folks; I am facing a problem with a real experimental pumping case. I am running a schedule 40, commercial steel, 45m length, 2" diameter pipeline for water. Since past month, suddenly, the head of the pumped dropped by 0.3 Kpa/m, however, the velocities are the same. I wonder is it...