Materials

The Material Graphite

The critical success factors for high quality graphite processing are: an homogeneous texture, an uniform grain structure, a perfect graphite impregnation process and consistent mechanical and thermal processing. Providing these, ensures that our products meet the most demanding requirements (e.g. cGMP capabilities).
Graphite is characterised by its wide ranging and high level of corrosion resistance. It resists nearly all acids, solvents, chlorides and other halogen compounds as well as their corresponding alloys.

The Material Silicon Carbide

Due to its hardness, its resistance against abrasion, its thermal properties and the universal corrosion resistance silicon carbide is an excellent material for the design of heat exchangers and other process equipment. Regarding its complete lack of ductility and other mechanical treatment it is very different from any metallic materials.
Crucial to the application of the pressureless and directly sintered silicon carbide SSiC used in GAB Neumann products is its excellent chemical and abrasion resistance.

The Plastic range (PTFE, PVDF, PE, PP)

PTFE is chemically inert, suitable for temperatures up to 230 °C depending on applications.
PVDF : Its thermoplasticity makes it easy to machining. It has a remarkable thermal stability from -30 °C to + 120 °C, a greater mechanical resistance than all current thermoplastics ; an excellent resistance to abrasion and to most corrosive agents, especially wet or dry chlorine, bromine and other halogens.
PP : It is a very versatile thermoplastic material. It is inert to corrosion of most acids, alkalis and some solvents. Operating limit temperatures : – 10 °C to 90 °C
PE : Very versatile thermoplastic and inert to corrosion of most acids, alkalis and some solvents. Moreover its impact strength, abrasive strength and resistance to low temperatures are excellent. It is therefore particularly suitable for the manufacture of centrifugal pumps for corrosive fluids containing suspended solids from.: -50°C to 80 °C.