L4 Series Screw Pumps – Superior technology & intelligent design

L4 Pumps are self-priming screw pumps with two screws in double volute and hydraulically balanced design. The drive torque is transmitted from the double helix drive screw to the likewise double helix idler screw via herringbone gears.The screws rotate closely meshing but without contact in the spindle bore of the interchangeable pump casing insert. As a result of the special profile geometry sealed cavities are formed which transport the pumped liquid continuously with low shear and without turbulences from both suction chambers axially to the discharge chamber. For optimum strength and low shaft deflection, both drive screw and idler screw are manufactured from single piece bar stock. 

Technical Advantages L4 Series Screw Pumps

Some outstanding technical parameters of the L4 Leistritz screw pump are as follows:The intelligent design of the Leistritz screw pumps offers enormous advantages over other pump technologies, like: ↗ low-pulsation pumping of the fluid ↗ extremely low vibration and noise ↗ high flow rates ↗ pumping a wide range of viscosities ↗ low-wear operation ↗ long service life

Detailed specifications of each model of L4 screw pump (L4NG, L4MG, L4HG) Leistritz.

L4NG, L4MG, L4HG MODULAR PUMP

GENERAL USELeistritz Screw Pumps L4NG/MG/HG are self-priming rotary positive displacement pumps for pressure ranges of 16 bar (232 psi), 40 bar (580 psi) and 150 bar (2175 psi) suitable for the transport of lubricating and non-lubricating, low and high viscous liquids with abrasive particles.USER ADVANTAGES↗Maximum allowable rotor deflection limited to 50% of radial clearance between rotor housing and rotor → highest process safety ↗Interchangeable liner → easy maintenance, low costs ↗Special rotor design available → Minimized pulsation → Optimized NPSHR ↗Low axial flow velocity → excellent priming ↗Suitable for dry running → maximized process safety

L4NC

GENERAL USEThe new compact screw pump design for the oil & gas industry! With focus on tank farm applications such as transfer, stripping, loading and unloading pumps. Developed for low capital expenditure (CAPEX) combined with highest efficiency and reliability for optimized operational expenditure (OPEX) USER ADVANTAGESPump casing: ↗ Economic and slim design for reduced weight Spindles: ↗ Single bar stock for maximum stiffness Timing gears: ↗ External double-helical gear for efficient power transmission Mechanical seal: ↗ Single acting seals Bearings: ↗ Self-aligning roller bearings on DE and NDE side 

Specification of L4 Series Screw Pumps

Performance Data

• Flow: 10-10,000 gpm
• Diff. Pressure: 1,500 psi (max)
• Viscosity: 0.1-20,000 cSt
• Temperature: 5-600° F

Scope of Supply

 Applications L4 Series Screw Pumps

The L4 Leistritz screw pumps are designed to serve a wide variety of applications in industrial environments. The most typical can be mentioned as: To get advice more suitable for your needs, contact TKP immediately to choose the right L4 Leistritz screw pump that you need!

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