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


Robust metering solutions for the use in the Chemical industry
Chemicals  industry

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!

More Details
Metering and dosing additives in the plastics industry
Plastics industry

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.

More Details


LEWA ecoflow diaphragm metering pump all around talent

LEWA ecoflow®: The Leading Diaphragm Metering Pump for Precision Fluid Management

LEWA ecoflow: The Innovative Universal Metering Pump with DPS Diaphragm Protection. Trusted across all industries, this modular system pump excels in a wide range of applications. Experience unparalleled versatility and reliability with our ecoflow, the ultimate choice in metering pump technology.

More Details
LEWA ecoflow process pump

LEWA ecoflow®: The Leading Process Pumps for High-Pressure Applications

The innovative ecoflow diaphragm process pump excels in high-pressure applications across industries including oil and gas, refinery, petrochemicals, pharmaceuticals, biotechnology, and food and beverage production.

More Details
LEWA triplex process pump

LEWA triplex®: Compact Process Pumps for High-Pressure Applications

The LEWA triplex process diaphragm pump stands out as one of the world's most compact high-pressure pumps, ideal for installation in confined spaces. Renowned for its robustness, it has demonstrated exceptional performance across various high-pressure processes in multiple industries.

More Details

Keep in touch with us

Get insights into our products and applications for liquid metering. You will also receive all the latest news about LEWA as well as invitations to our exclusive events.

Social Media

LEWA is on LinkedinLEWA is on YouTubeLEWA is on Instagram
©2024 LEWA GmbH  Terms & Conditions Privacy Imprint