L4 (L4NG / L4MG / L4HG)

Leistritz L4 modular twin-screw, double-volute, self-priming positive displacement pumps for low, medium and high-pressure duty, suitable for abrasive and non-abrasive, corrosive and non-corrosive, lubricating and non-lubricating, high or low viscosity fluids. Flow rate up to 6,000 m³/h (26,400 GPM), differential pressure up to 150 bar, viscosity up to 150,000 cSt, pumping temperature up to 350 °C. Rotors made from a single piece of bar stock, helical gear teeth, interchangeable liner, special rotor design for minimized pulsation and optimized NPSHR, dry-running capability. Also the basis of Leistritz multiphase pump systems.

Key technical parameters

• Flow rate: up to 6,000 m³/h (26,400 GPM)
• Differential pressure: up to 150 bar
• Fluid temperature: up to 350 °C
• Viscosity: up to 150,000 cSt
• Design: twin screw, double volute, self-priming; interchangeable liner
• Installation: Horizontal
• Drive: Electric motor, hydraulic motor or combustion engine, variable speed drive
• Casing material: Grey / nodular cast iron to cast steel (cast design); carbon steel to stainless steel (welded design)
• Seal: single or double-acting mechanical seal, API plans

Media handled

• Liquids: Crude oil, Fuel oil, Lubricating oil, Bitumen, Chemicals
• Media properties: Low viscosity, High viscosity, Abrasive, Corrosive

Applications and industries

• Blending, cooling / circulating, export
• Pipeline start-up and stripping
• Tank cleaning, transfer, loading / unloading
• Multiphase pump systems for oil and gas