Polyurethane mixing process

Polyurethane, also known as PU or PUR, is a foam plastic that offers a wide range of applications. The foam is formed due to a chemical reaction in which isocyanate and polyol, as well as a blowing agent are mixed together. The reaction starts immediately after mixing and thus forms the foam plastic. Depending on the intended use, the foam is used in blocks or sheets, which are then shaped.

Pump for polyol

Polyol is an organic compound, a so-called polyalcohol. These are polyhydric alcohols that are produced, for example, for the plastics industry in petrochemical or oleochemical processes. Compared to isocyanates, polyols have good lubricating properties, which can be used in this application for the design of the pump. The main advantage of these good lubricating properties is that the pump can be designed cost-effectively and reliably. At the same time, costly material combinations such as ceramic friction bearings and coated gear shafts can be dispensed with.

Polyol has properties that are not critical for the environment and process safety, allowing the use of a low-cost, simple mechanical seal.

Series used: CHEM

Advantages:

  •     Very good metering properties for well-lubricating, viscous media
  •     High metering accuracy
  •     High-quality materials as standard equipment, thus durable and low-maintenance

Operating parameters

Pump type
CHEM 4,7
Flowrate l/min
0,5 up to 5
Possible seals for this application
Simple, internal mechanical seal, optionally buffered mechanical seal or magnetic coupling
Heating
not required - optional: electric or hydraulic possible