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vacuum pumps, liquid ring pumps - water usage and sizing6/9
we are cutting on the 5*8 cnc router a thin composite (acp), and so far we have been using 2x double stage 4kw blowers with inverters.
One option we consider is a liquid ring pump that we can buy at a relatively good price (below 500EUR) for the 15hp I get. I expect though a 8gpm (3m3/h) water consumption, which is huge. Is this what you also experience? Do you use other sources of water? What alternatives to this volume do I have?
I found also another pump that is atypical for cnc, namely one for semiconductors (dry pump). it is a combination of 2 pumps, and is doing in excess of 700cfm at very deep vacuum. Anyone tried this type?
on the rotary vane, quite a few people complain about the maintenance costs. I would stay away from them for this reason.
any recommendations are welcome.
water ring ,its best effective/cost
thank you yaakov
I took the numbers for the flow from the manual...
but I don't know what other elements would I need. No local specialist in such pumps around here (Romania) so i cannot figure out the correct parts I need. Wiring should be fine (inclusing either inverter of soft started which i have both), but for the water/air circuit it is a bit confusing.