Electromagnetic flowmeter lining selection instructions

How to correctly choose the lining material of electromagnetic flowmeter
The lining material should be selected according to the corrosiveness, wear and temperature of the tested medium:
First, natural rubber (soft rubber)
  1, better elasticity, wear resistance and tearing force
  2, resistant to general weak acid, weak alkali corrosion
  Water measurement, sewage
Second, acid-resistant rubber (hard rubber)
  It can resist the corrosion of hydrochloric acid, acetic acid, oxalic acid, ammonia water, phosphoric acid and 50% sulfuric acid, sodium hydroxide and potassium hydroxide at room temperature, but it is not resistant to corrosion by strong oxidants.
  Measuring general acid, alkali, salt solution
Third, neoprene (Neoprene)
 1, excellent elasticity, high tearing force, good wear resistance
 2, resistant to general low concentration of acid and alkali, salt solution corrosion, but not resistant to oxidative medium rot
 <80 ° C;
Water, sewage, mud and slurry
Fourth, Polyurethane (Polyurethane)
1, excellent wear resistance
 2, poor acid and alkali resistance
 <40°C
 Measuring moderately strong wear of coal slurry, mud and slurry
Five, polytetrafluoroethylene (PTFE)
1. Boiling hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and various organic solvents
2, good wear resistance, poor bonding performance
-80 to +180 ° C;
Measuring concentration, concentrated alkali strong corrosive solution and hygienic medium