Production of melamine with LEWA diaphragm pumps

Melamine is obtained by the trimerization of urea. The urea is converted into melamine, ammonia and carbon dioxide (offgas) either in a catalytic low pressure process or in a non-catalytic high pressure process.

LEWA can reliably operate pumps for melamine processes in many applications with high temperatures and simultaneous high pressure using PTFE diaphragm pumps, e.g., at 155°C and about 230 bar.

Thus urea as an industrial raw material can be conveyed as a melt with the appropriate pump heads.


LEWA metering and process diaphragm pumps meet the specific demands for urea conveying.

The important advantages are:

  • Melt conveying possible up to 155°C with PTFE diaphragm
  • Different drive sizes, even for high volume flows
  • Pressures up to 230 bar
  • Controlled diaphragm positioning to prevent unfavorable conditions
  • Strength and reliability due to LEWA technology suitable to the application

In order to keep the urea melt liquid (solidifying below 135°C), the appropriate devices, pipelines and pumps are temperature controlled.

LEWA's completely jacketed diaphragm pump head is especially suitable for this application. Both the pump head cover and the process valves are jacketed in this manner, so that the operating temperature is maintained within a specified range.

Areas of application

  • Wood processing industry
    lamination of particle board, fiberboard, and laminated panels



LEWA supplies you with individual chemical pumps and customized system solutions for various areas of application in the chemical industry.

Plastics processing

LEWA supports you in plastics processing with custom-built plants and systems. Ask our experts for more information!


LEWA ecoflow® diaphragm metering pump

LEWA ecoflow diaphragm metering pump all around talent 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® process pumps for high-pressure applications

LEWA ecoflow process pump The LEWA ecoflow process diaphragm pump is the top performer among innovative and universal process pumps for high-pressure process technology.

LEWA triplex® process pumps for high-pressure processes

LEWA triplex process pump LEWA triplex is the most compact process pump in the world for high-pressure processes in all branches of industry. Contact us, we are happy to help!

Get updates

Subscribe to our newsletter!

Get LEWA insights on products, applications and the business of metering fluids. Subscribe now for free.

Follow us

LEWA is on Linkedin LEWA is on YouTube LEWA is on Instagram
© 2020 LEWA GmbH
© 2020 LEWA GmbH