In petrochemical and chemical process engineering, screw pumps, acting as displacement pumps, offer hydraulic characteristics which make them indispensable for the entire viscosity range. In chemical applications in particular, the high suction force and the gentle handling of the fluids to be pumped are the outstanding features of this type of pump. In general, all Leistritz pumps can be used in this field, but the most common one is the two-rotor pump.
Leistritz screw pumps are used to pump clean or slightly abrasive, low and high viscosity fluids with lubricity from poor to good, such as: additives, bitumen, resins, crude oil, greases, benzenes, adhesives, silicates, isocyanates, tar, polyols, asphalt, paints/varnishes, paraffin, polymers, and various other chemical products.
For chemical and petrochemical applications, the material and safety requirements are correspondingly high. Here, Leistritz offers process- and customer-oriented solutions which are perfectly tailored to the individual tasks.
Typical pumps for chemical applications:
L2NG Screw Pumps
Leistritz screw pumps in the L2 range are twin-screw, single-volute, self-priming positive displacement pumps for the low-pressure range. They are used to pump slightly aggressive, slightly abrasive, low to high-viscosity fluids with good to poor lubrication properties.
High efficiency > Low operating costs
Only one shaft seal > low-maintenance
Suitable for short dry runs > Maximum process reliability
Radial bearing bushes > Long service life
Space-saving installation in the tank
No suction or NPSH problems
Use as a cargo pump or primary lubricating oil pump in shipbuilding
L4HG Screw Pump
Leistritz screw pumps in the L4HG range are twin-screw, double-flow, self-priming positive displacement pumps capable of high flow and pressure ranges. They are used to pump corrosive / non-corrosive, abrasive / non-abrasive low to high-viscosity fluids with lubrication / non-lubrication properties.
Cased pumps with replaceable
Flange-mounting in accordance with DIN or ANSI available
Welded version with a variety of flange arrangements and heating system options
Single-acting or double-acting mechanical seals available (as well as cartridge seals)
Suitable for multi-phase applications to a limited extent – gas contents up to 30 %
Pumping of non-Newtonian fluids
Stainless steel version available
External heating available
High temperature version available
Metrans Makina is the only authorized Leistritz distributor and service provider in Turkey.