Selection of mechanical pumps
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Our company uses propylene oxide as a medium; the storage tank for this propylene oxide is underground, while the pumps are located above ground. We are currently using diaphragm pumps, but they keep leaking from the diaphragm. What kind of pumps do you people use? Thank you in advance
Why not consider using a leak-free pump? Are you using a diaphragm pump for accurate metering?
For pumps used to draw liquid at low heights, self-priming pumps are commonly employed; in some cases with centrifugal pumps, a check valve needs to be installed at the inlet.
Choosing a diaphragm pump of good quality seems to avoid problems as well; the main issue is the strong solubility of PO, which requires high standards for the quality of the diaphragm.
Using a sliding vane pump, it has strong self-priming capability; the tank can be emptied without the need for a bilge pump
A pneumatic diaphragm pump with an integrated diaphragm can be considered.