Pumps and Systems for the Plastics Industry

LEWA supports plant construction companies, manufacturers, and processors in the plastics industry with pumps and systems for many different processes.

We deliver high-quality pumps and custom-built systems for these applications all over the world. You get this complete service from a single source, from consultation through to commissioning.

Plastics
With LEWA Products Throughout the Production Process

LEWA supplies pumps and systems to support you in the many different production steps involved in plastics processing. We assist you in the processing of polyethylene, polypropylene, polyurethane, and polyamide. What's more, we also supply you with metering systems for compounding as well as for catalyst and foaming agent metering.

We offer you special expertise for all compounding processes in the plastics processing industry such as the addition of waxes, flame retardants, and lubricants.

LEWA metering system for the plastics industry

Areas of Application in the Plastics Processing Industry

Our experts are on hand with help and advice and will work with you to develop custom metering solutions. Our expertise in polyethylene processing in particular is in high demand worldwide.

In the following table, you can see applications for the metering of reactants and catalysts.

Examples of reactants and catalystsExamples of plastics
  • Vinyl acetate
  • Propylene
  • Butane
  • Hexane
  • Teal, T.E.A.
  • Varieties of polyethylene
    1. LDPE
    2. MDPE
    3. HDPE
    4. LLDPE
  • Donor
  • Peroxide
  • Polypropylene
  • Catalysts
  • Polyvinylchloride (PVC)
  • EPVC
  • SPVC
  • Amine
  • Vinyl acetate
  • Ethylene vinyl acetate (EVA)
  • Dinitrotoluene (DNT)
  • Raney nickel catalyst
  • Polyurethane
  • Catalysts
  • Polyacrylate
  • Caprolactam
  • Polyamide
  • Urea, liquid ammonia
  • Melamine

LEWA supports you in the further processing and refining of plastics. This includes compounding, i.e., during the addition and metering of flame retardants and lubricants, plasticizers, colors, antistatic agents, and other additives for property optimization, as well as foaming agent metering during foam extrusion.

Base plasticExamples of products
  • LDPE (examples)
  • Shrink wrap for books, bundles, and pallets
  • Wrapping film for hand towels, fabrics, PET bottles
  • Film for baked goods, meat, coffee, frozen foods
  • Packaging for applications such as milk cartons and "bag-in-box"
  • Laminated paper and highly stress-resistant containers for industrial use
  • Polystyrene foam (PS foam)
  • Insulation boards and food packaging trays
  • Polyethylene foam (PE foam)
  • Packaging films, impact sound insulation, ceiling sealants, and insulation tubes
  • Polyurethane foam (PU foam)
  • Insulation boards, insulation tubes
  • Foam granules (EPS/EPP/EPE)
  • Reusable transport packaging and molded parts for bumper cores
  • Polycarbonate
    (PC)
  • Safety helmets, visors
  • Lamp covers for the automotive industry
  • Other raw material bases
  • Plastic sheathing for cables
  • Rubber production

Solutions for Plastics Processing

Our LEWA ecofoam system provides a tested and modular metering system for your specific application in the field of physically foaming polyolefins such as polyethylene processing.

This system is used worldwide by leading manufacturers and is characterized by controlled and exact metering. Not only does this ensure that the foamed product is always of a consistently high quality, it also significantly reduces scrap.

LEWA metering system for the plastics industry

Advantages at a Glance

High end pumps, equipment and systems

We deliver high-end pumps integrated into complete systems and units for your specific applications. In doing so, we of course rely on the tried-and-tested LEWA quality.

Flexible application

High variability in operation in terms of pressure, temperature, flow rate and fluid properties with high metering accuracy guarantee a wide range of applications.

Tried and tested modular system

We design our systems and units in modular design with numerous engine and pump head combinations for different applications.

Special materials

On request, we can build systems with special materials such as Hastelloy, titanium, duplex stainless steel or further materials. If you are interested, please contact our product manager.

Heating and cooling devices

We respond flexibly to extreme requirements: Pump heads and the complete chemical pump can be equipped with a heating or cooling device, if necessary.

Patented sandwich diaphragm

Our patented diaphragm metering pumps use metal or PTFE sandwich diaphragms with Diaphragm Protection System (DPS) for maximum operational safety.

Easy to clean

An especially important advantage for pharmaceutical and food industry is that our systems can be quickly and easily cleaned with cleaning chemicals or hot steam.

Explosion protection

Safety comes first: LEWA supplies systems and units, also available with explosion-proof motors for safety of your employees.

International standards

LEWA pumps, systems and units are compliant with major international standards such as DVGW G280, WHG, PED, ISO 9001, ASME, ATEX and TA-Luft. Of course, you can also define your own standards.

Products

LEWA ecoflow diaphragm metering pump

LEWA ecoflow diaphragm metering pump

The ecoflow® diaphragm metering pump from LEWA is a true all-around talent in the field of metering and mixing and can be used in all industries.

LEWA ecoflow packed plunger metering pump

LEWA ecoflow packed plunger metering pump

The LEWA ecoflow® packed plunger metering pump is the high-performance and economical metering pump for simple pumping or metering tasks.

LEWA ecosmart

LEWA ecosmart the smart metering pump

The LEWA ecosmart® diaphragm metering pump is the inexpensive metering pump for various applications and can be ordered quickly and conveniently through the online store.

LEWA ecodos mechanical diaphragm pump

LEWA ecodos mechanical diaphragm pump

The ecodos® mechanical diaphragm metering pump from LEWA is suitable for all pumping and metering tasks in the low-pressure range.

LEWA intellidrive diaphragm metering pumps

LEWA intellidrive diaphragm metering pump

Use servomotor-controlled diaphragm metering pumps for precision metering and mixing of fluids in metering plants and systems.

LEWA FC laboratory pump

LEWA micrometering pump FC

The smallest flow rates and precise metering make LEWA micro-metering pumps of the FC series the first choice for laboratory pumps.

Nikkiso centrifugal canned motor pump

Nikkiso canned motor pump

The NIKKISO centrifugal canned motor pump is perfectly suited for transfer and circulation tasks in the chemical industry. We are happy to help you make your selection.

LEWA ecofoam

LEWA ecofoam metering system for plastics extrusion

LEWA ecofoam® is the number-one choice when it comes to manufacturing foam. Benefit from a complete metering system for foaming plastic.

Customized production units

LEWA metering and mixing system

LEWA develops complete systems for metering, mixing, and filling fluids. Contact us and let us advise you!

Customer-specific metering systems

LEWA metering system

LEWA provides you with custom-designed metering systems according to your specifications. Put your trust in the experience gained from 60 years of metering technology in various industries.

References

  • CO2 Metering of liquid CO2 (blowing agent)

    CO2 Metering of liquid CO2 (blowing agent)

    CO2 Metering of liquid CO2 (blowing agent)

    The customer’s challenge: For the manufacturing of insulation materials the metering of liquid CO2 (blowing agent) is required

    LEWA’s scope of delivery: System

    Delivery in detail: Custom-designed metering system with 1 LEWA ecoflow diaphragm metering pump, type LDB1 / M200, cooling unit, mass flow meter, DCS with control according to set point setting

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump
    LEWA ecofoam

    FluidPressure in barFlowrate in l/h
    Carbon dioxide3004.2
    MarketProcess
    Synthetic Fibers -
    Synthetic Materials / Plastics    		Blowing agents,
    Expanded foam, Extrusion
  • Metering of liquid CO2 (blowing agent)

    Metering of liquid CO2 (blowing agent)

    Metering of liquid CO2 (blowing agent)

    The customer’s challenge: For the manufacturing of insulation materials the metering of liquid CO2 (blowing agent) is required

    LEWA’s scope of delivery: Skid

    Delivery in detail: 1 Custom-designed metering system with 1 LEWA ecoflow diaphragm metering pump, type LDE3 / M200, cooling unit, mass flow meter, DCS with control according to set point setting

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump

    FluidPressure in barFlowrate in l/h
    Carbon dioxide414100
    MarketProcess
    Synthetic Fibers -
    Synthetic Materials / Plastics    		Blowing agents;
    Expanded foam, Extrusion
  • Metering of liquid butane (blowing agent)

    Metering of liquid butane (blowing agent)

    Metering of liquid butane (blowing agent)

    The customer’s challenge: For the manufacturing of insulation materials and packaging materials the metering of liquid butane (blowing agent) is required

    LEWA’s scope of delivery: System

    Delivery in detail: 1 Custom-designed metering system with 1 LEWA ecoflow diaphragm metering pump, type LDC3 / M910S, mass flow meter, piping, filter, pressure regulator and control cabinet with LEWA smart control controller

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump
    LEWA smart control

    FluidPressure in barFlowrate in l/h
    Butane34030
    MarketProcess
    Synthetic Fibers -
    Synthetic Materials / Plastics    		Blowing agents,
    Expanded foam, Extrusion
  • Metering of butane (blowing agent)

    Metering of butane (blowing agent)

    Metering of butane (blowing agent)

    The customer’s challenge: For the manufacturing of insulating material a metering system for butane (blowing agent) is needed

    LEWA’s scope of delivery: System

    Delivery in detail: Custom-designed metering system with 1 LEWA ecoflow diaphragm pump, type LDD3 / M910, cooling unit, mass flow meter, DCS with control according to set point setting

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump
    LEWA ecofoam

    FluidPressure in barFlowrate in l/h
    Butane35088
    MarketProcess
    Synthetic Fibers -
    Synthetic Materials / Plastics    		Blowing agents,
    Expanded foam, Extrusion
  • Metering of liquid butane (blowing agent)

    Metering of liquid butane (blowing agent)

    Metering of liquid butane (blowing agent)

    The customer’s challenge: For the manufacturing of insulation materials a metering system for liquid butane (blowing agent) is required

    LEWA’s scope of delivery: System

    Delivery in detail: 1 Custom-designed metering system with 1 LEWA ecoflow diaphragm metering pump, type LDE3 / M900, mass flow meter, DCS with control according to set point setting

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump
    LEWA ecofoam

    FluidPressure in barFlowrate in l/h
    Butane350100
    MarketProcess
    Synthetic Fibers -
    Synthetic Materials / Plastics    		Blowing agents,
    Expanded foam, Extrusion
  • Metering of flame retardant

    Metering of flame retardant

    Metering of flame retardant

    The customer’s challenge: In the production of plastics flame retardant has to be metered

    LEWA’s scope of delivery: System

    Delivery in detail: Custom-designed metering system completely electrical heat traced and insulated, with 1 gear wheel pump, storage tank, strainer, valves, mass flow meter and control cabinet, for operating temperature of 80 °C

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump
    LEWA ecofoam

    FluidPressure in barFlowrate in l/h
    Flame retardant13714
    MarketProcess
    Synthetic Fibers - Synthetic Materials / PlasticsPolyester
  • Metering of flame retardant (Irganox 1081)

    Metering of flame retardant (Irganox 1081)

    Metering of flame retardant (Irganox 1081)

    The customer’s challenge: In the production of plastics the metering of flame retardant is required

    LEWA’s scope of delivery: System

    Delivery in detail: Custom-designed metering system completely installed in heated cabinet, with 1 LEWA ecoflow diaphragm metering pump, type LDB1 / M900, strainer, valves, mass flow meter and control cabinet, with melting tank 50 l, for operating temperature of 100 °C.

    LEWA main product/s:
    Custom-designed metering system
    LEWA ecoflow diaphragm metering pump

    FluidPressure in barFlowrate in l/h
    Flame retardant2014
    MarketProcess
    Synthetic Fibers - Synthetic Materials / PlasticsPVC - E-PVC

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