LEWA supports you in plastics processing with custom-built plants and systems. Ask our experts for more information!
When producing plastics, numerous manufacturers rely on the ecofoam system from LEWA for the precise and fast metering of blowing agents in the extruder.
The metered flow of the blowing agent is regulated according to the extruder output. The system – which features an integrated flow measurement system and a control unit – is tested and available as a turnkey system with multiple output ratings. LEWA ecofoam relies on tried-and-tested LEWA diaphragm pump technology.
This means that precise, reliable, and low-maintenance operation is guaranteed for the non-lubricating blowing agent, even at a high vapor pressure level.
The LEWA ecofoam metering system is a complete blowing agent system based on our tried-and-tested diaphragm pump technology.
We are happy to provide you with a pilot plant for process optimization. The LEWA ecofoam pilot plant has been designed for all common blowing agents, including a cooling device for CO₂ and an explosion-proof design for combustible blowing agents. You will be happy with the quality of the ecofoam pilot plant and the uniformly accurate metering of various blowing agents. The plant can be leased for up to six weeks for a low flat fee, or longer following consultation.
Precise, rapid control of the metered flow when changes are made to the extruder output or the extruder pressure ensures that the end product is always of top quality. This is achieved by a control system developed by LEWA, which continuously monitors the plausibility of set values and actual values. The control system, metering pump, and Coriolis flow meter are all adapted to the specific application.
LEWA ecofoam meters all known blowing agents – from halogenated hydrocarbons (Freon 11, 12, etc.), butane, pentane, and propane through to CO2. We have also delivered pilot systems with water injection technology to customers. You can rely on our decades of experience in various blowing agents. Not only that, but we can even provide further assistance during conversion to CO2.
We work with you during the project stage to clarify all the key process parameters, such as suction pressure, any cooling that may be required, pressurization, and so on. LEWA ecofoam is delivered as a turnkey system and comes completely assembled – including piping and wiring – on a base frame, ready for operation.
For CO2 applications, we provide suction-side heat exchangers in the pipeline for cooling the CO2 upstream of the pump inlet and a cooling jacket on each pump head. We also provide a flow cooler for cooling the cooling medium, including the cooling circuit.
It goes without saying that our ecofoam system relies on our tried-and-tested LEWA diaphragm technology that features maximum efficiency, complete sealing, integrated protection, and monitoring.
We supply ecofoam metering systems with a wide range of additional components: a suction-side strainer, two contact pressure gauges for monitoring pressure in the suction-side and discharge-side pipeline, and a type-tested and function-tested safety valve for protecting the metering system against overpressure.
Thanks to the tried-and-tested module system of our diaphragm metering pumps, we are able to customize the ecofoam metering system to meet your individual requirements.
|Discharge pressure, min. [bar]||Discharge pressure, max. [bar]||Flow rate, min. [kg/h]||Flow rate, max. [kg/h]||Operation, min. [°C]||Operation, max. [°C]||Viscosity [mPa∙s]|
|50||500||0.5||250||-40||+40||< 1 (liquid gases)|
|L [mm]||W [mm]||H [mm]|
*Installation dimensions are approximate and may vary