Polyethylene production with LEWA pumps and systems

LEWA manufactures metering pumps and metering systems for the polymerization of ethylene that meet your requirements.

The following plastics are produced in the processes of polyethylene production with the aid of LEWA products:

  • HDPE (High Density Polyethylene)
  • MDPE (Medium Density Polyethylene)
  • LLDPE (Linear Low Density Polyethylene)
  • LDPE (Low Density Polyethylene)

Solutions polymerization

LEWA pumps offer the following advantages for polyethylene production:

  • Hermetically tight
  • Pressures over 300 bar
  • High flow rates
  • Drives with electrical stroke adjustment
  • Motors for frequency converter operation
  • Wide reproducible adjustment range
  • Extremely precise flow rates
  • Sturdiness and reliability
  • Explosion proof

Areas of application in polymerization

LEWA supplies metering pumps and systems for ethylene polymerization which are used in processes including the following:

  • Radical production in high pressure reactors, e.g., autoclave reactors, tube reactors (LDPE)
  • Catalytic production in low pressure reactors (MDPE, HDPE, LLDPE)

Application examples are:

  • Packaging materials, e.g., shrink wrap, wrapping film, film for “bag-in-box” applications, food packaging film, laminated papers
  • Highly stressable containers for industrial use

Background for ethylene polymerization

Process description

Polyethylene consists of hydrogen and carbon. The properties of polyethylene can be changed through copolymerization. It is very resistant to acids, alkaline solutions and other chemicals. Its range of application is limited because it softens at temperatures above 80 °C. Polyethylene is a thermoplastic produced from the polymerization of ethylene. It belongs to the polyolefins and is produced based on ethylene gas.

LDPE (soft polyethylene) results from the high-pressure process and HDPE (hard polyethylene) from the low-pressure process. In both production methods, it appears first as a viscous fluid.

Source: Wikipedia, February 2012

Industries

Pumps and Metering Packages for the Petrochemical Industry

We have supplied durable pumps and metering systems for applications such as the hydrocracking process for over 50 years. Petrochemicals generate starting products for the manufacture of plastics, pharmaceuticals, colorants, detergents, and other products. Contact our experts and allow us to provide you with detailed information about metering and pumping solutions for the hydrocracking process!

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Chemical Pumps and Metering Packages for the Chemical Industry

When critical, environmentally hazardous, toxic, or flammable fluids and suspensions need to be reliably conveyed or metered in high-pressure processes, there is no alternative to hermetically sealed metering pumps, process diaphragm pumps, and metering systems from LEWA. Hermetically sealed LEWA pumps with pressures up to 1200 bar are the first choice for the production of chemical intermediate and end products. Contact our experts and let us advise you about your individual chemical pump or system solution!

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Pumps and Systems for the Plastics Industry

We offer you special expertise for all compounding processes in the plastics processing industry (addition of waxes, flame retardants, and lubricants). Contact our experts! We're happy to give you advice about metering and pumping solutions for the plastics industry such as in polyethylene processing.

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Products

LEWA ecoflow® diaphragm metering pump

LEWA ecoflow is the innovative and universal metering pump with DPS diaphragm protection system in a tried-and-tested modular system. Suitable for numerous applications, the ecoflow is our real all-around talent, relied on by customers from all industries.

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LEWA ecoflow® process pumps for high-pressure applications

The innovative ecoflow diaphragm process pump shows its strengths in high-pressure applications in the oil and gas, refinery and petrochemical industries as well as in the sensitive areas of pharmaceuticals, biotechnology, food and beverage production.

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LEWA triplex® process pumps for high-pressure processes

The LEWA triplex process diaphragm pump is among the world's most compact high-pressure pumps and can even be set up in the tightest spaces when space is at a premium. The power package has proven its strength in numerous high-pressure processes in a variety of industries. Oil and Gas icon Gas odor icon gray Refinery icon Petrochemicals icon Chemicals icon Plastics icon gray Cleaning icon Cosmetics icon Pharma icon Food icon Energy icon Other icon

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Sundyne-Marelli horizontal and vertical process pumps

With flow rates as high as 8000 m³/h and a wide variety of different pump models, Sundyne-Marelli has a pump that will fit your application.

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HMD Kontro sealless solenoid driven centrifugal pumps

HMD Kontro sealless solenoid driven centrifugal pumps are the first choice for handling toxic, aggressive, flammable, hazardous and high-value fluids. Protecting pumping fluid, people and the environment is particularly emphasized here.

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Sundyne & Sunflo high-speed centrifugal pumps & compressors

Sundyne process pumps in accordance with ISO-13709, API-610 (OH5 OH6) and Sunflo pumps are the best choice for applications with high heads and small flow rates. The centrifugal pumps feature a simple design and consistent performance data.

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LEWA ecofoam® Blowing Agent Metering System

Redundantly designed, absolutely leak-proof system working in combination with extruders for metering various blowing agents in plastic production.

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Customer-Specific Metering, Mixing or Filling Systems from LEWA

Customer-specific batch/continuous systems for your production process. Metering, mixing, filling, separating, controlling temperature: We work with you to develop the ideal process-related sequence and produce the system that fits your production process – right up to the end product.

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Customer-Specific Metering Systems from LEWA

Turnkey metering system in closed loop control with monitoring and plausibility testing equipment. Your individually configured metering system with an optimally designed pump for fluid metering in automated processes.

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