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Twin-Screw Pumps

Twin-Screw Pumps are self-priming, double ended positive displacement pumps with external timing gears and bearings. Manufactured in over 80 sizes, their design provides complete axial balancing of the rotating elements and eliminates all metal-to-metal contact within the pump.

They can handle virtually any non-homogeneous fluid, regardless of viscosity, lubricity or abrasiveness e. g. seawater, bitumen, molasses, lime, acid, caustic solution or hydrocarbon.

Principle

While pumping there is no metal-to-metal contact within the pump housing. This allows good pumping performance even with non-lubricating and corrosive and contaminated fluids.

As the pump rotates, the intermeshing of the two screws along with the pump housing form chambers. These chambers fill with the pumped fluid and move it from the suction side of the pump to the higher pressure discharge side of the pump.

The pump is designed to allow for reverse flow by simply changing the shaft direction. The suction becomes the dis-charge and vice versa, all without any modifications to the pump.

Advantages

• Wide range of applications
• Self-priming
• Pumped capacity proportional to speed
• Compact construction
• Direct drive without speed-reducer possible
• Change of pumping direction - simple
• Pumping elements - simple to replace
• Easy maintenance
• For almost all media and fluids
• High viscosities possible
• Low pulsations
• Low noise level
• Dry running possible
• Constant flow on varying pressures and volumes
• Very good suction performance up to NPSH 1 - 1,5 m/3 - 5 feet
• Engineered 2-piece shaft and screw construction

Scopes of Application

• Up- and Midstream
• Downstream
• Marine
• Offshore
• Industry
• Food and Pharma

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