Regarding the issue of installing a filter screen at the inlet of metering pumps for transporting media with high viscosity
Thread Content
What I would like to ask is whether the pre-filter on diaphragm metering pumps used with transfer media whose viscosity is greater than 1000 can cause problems such as easy clogging at the inlet or inaccurate flow rates.
With such high viscosity, why not use a gear pump? If that’s not feasible, then use a filter with fewer mesh counts. Personally, I think using a diaphragm metering pump should be no problem
What medium has such high viscosity? Both metering pumps and gear pumps are excellent choices; compared to centrifugal pumps, their flow rate is less affected by the viscosity of the medium. However, it is important to ensure that the pipelines are unobstructed first.
Only the viscosity is provided; nothing is said about the material – are there any particles? It is recommended to use a gear pump with variable frequency control
Agree with what was said above; it’s a gear pump.
Due to the high viscosity, gear pumps are more suitable than diaphragm pumps; the check valves in high-viscosity diaphragm pumps present a problem.
Reply to 6# lxn_663: I fully agree with suggestion 6#. At a viscosity of 1000 CPS, it will be difficult to open and close the valve balls of diaphragm pumps; it is recommended to use gear pumps instead!
With a viscosity of 1000 CPS, the valve ball in diaphragm pumps does indeed experience some issues when opening and closing; however, the valve ball can be made of other materials (I’ve seen this in practice: when the viscosity is too high, the valve ball cannot return to its original position in time)； It is recommended to use a self-cleaning filter, which can promptly remove impurities adhering to the surface of the filter screen