PTFE diaphragm pumps to handle solids?
PTFE diaphragm pumps to handle solids?
(OP)
Gents,
We are planning to select a PTFE single diapfragm metring pump to pump gasoline. The pump will opertate at 50 meters diff. head and 1.2 m3/h flow. It pumps from the tank buttom and the stream contains solid particles, does this pump type fit the requirmentrs? Does PTFE handles such a process? the vendor (LEWA) guarantees 20,000 hours of opeartins as i questioned the realibilty of the diaphrgm. The NPSHA is very low (0.4 meters), can you pls. advice
upm
We are planning to select a PTFE single diapfragm metring pump to pump gasoline. The pump will opertate at 50 meters diff. head and 1.2 m3/h flow. It pumps from the tank buttom and the stream contains solid particles, does this pump type fit the requirmentrs? Does PTFE handles such a process? the vendor (LEWA) guarantees 20,000 hours of opeartins as i questioned the realibilty of the diaphrgm. The NPSHA is very low (0.4 meters), can you pls. advice
upm





RE: PTFE diaphragm pumps to handle solids?
RGS
RE: PTFE diaphragm pumps to handle solids?
Cheers
Steve
RE: PTFE diaphragm pumps to handle solids?
The diaphrams can be subject to fatigue failure if there are pulsation problems in either the suction or discharge. Another problem can occur in the suction and discharge check valves if the particulate is sticky or fiberous (makes the valves hang up). Lewa is a reputable man'f. with many years of experience. If the proper process medium spec. was supplied, as well as flow and head requirements and Lewa did the spec'ing, the pumps should perform as intended.
Hope this helps.
saxon
RE: PTFE diaphragm pumps to handle solids?
We are buying the pump from Lewa its self .
They confirmed the low NPSHA and the performance chart shows that this pump can handle such a low NPSH. However, what worries me is the solids, our process guyes could not estimate the soilds size and therfore, it is unknown for Lewa if the pump will nadle it..
Do you advice to ask for doube diaphragms????
upm
RE: PTFE diaphragm pumps to handle solids?