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Screw pumps : Pumps for cooling lubrication

Hydraulic pumps

“ For water soluble coolant you will be able to use the advantages of a screw pump. Customer-specific designs are possible. ”
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Water soluble machine tool coolant can be a very difficult pumping service to handle. The fluids have a very low viscosity of only about 1 mm²/s, must by delivered at high pressure and contain abrasives, mostly metal residues.

It is due to the innovative design, and especially the casing coating, that the advantages of the KRAL screw pump can be successfully applied to machine tool coolants. KRAL coats the running casing with a resistant polymer. This synthetic material can absorb particles. According to specifics of the application other materials can also be used.

Water soluble machine tool coolants are pumped at high pressures of up to 120 bar. Only at such high pressure is sufficient cooling and flushing of the chips accomplished. The balancing cylinder of the pump has orifice insertions to reduce the leakage rate, therefore efficiency remains high.

The screw material and the casing coating have been designed for improved sliding properties in such a way that low viscosity fluids is pumped with no problem. The KRAL machine tool coolant pump can be supplied for dry or wet installation. A mounting flange has already been provided for vertical wet installation.

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See also

Accumulators Hydraulic filters Industrial valves Conditioning Hydraulic jacks Hydraulic motors Hydraulic power units Pressure regulators

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