How to choose the material for the rotor and stator of a screw pump
When purchasing stators and rotors, how to choose their materials can refer to the following figure.
|
Material (Stator) |
Corrosion resistance |
Resistance to swelling |
Abrasion resistance |
Temperature range |
|
Nitrile butadiene rubber |
normal |
good |
good |
110 ℃ |
|
EPDM rubber |
good |
poor |
good |
120 ℃ |
|
Fluoro rubber |
fine |
fine |
normal |
180 ℃ |
|
Hydrogenated nitrile butadiene rubber |
fine |
good |
good |
170 ℃ |
|
Polytetra Fluoroethylene |
fine |
fine |
poor |
230 ℃ |
|
Material (Rotor) |
Corrosion resistance |
Abrasion resistance |
|
Alloy steel |
good |
fine |
|
Stainless steel SS304 |
good |
good |
|
Stainless steel SS316L |
fine |
good |
|
Stainless steel SS304+ plating |
good |
fine |
|
Stainless steel SS316L+ plating |
good |
fine |
|
Duplex stainless steel |
very good |
good |
|
Duplex stainless steel + plating |
very good |
good |
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