Introduction To The Main Lining Materials Of Fluorine-lined Valves
Lined Valve Main lining material:
Perfluoroethylene FEP (F46)
Applicable media:
Any organic solvent or reagent, dilute or concentrated inorganic acid, alkali, ketone, aromatic hydrocarbon, chlorinated hydrocarbon, etc.
Using temperature:
-85~150
Features: Mechanical, electrical properties and chemical stability are basically the same as F4, but the outstanding advantage is high dynamic toughness, excellent weather resistance and radiation.
Polytetrachloroethylene PTFE (F4)
Using medium: strong acid, strong alkali, strong oxidant, etc.
Using temperature: -200~180
Features: It has excellent chemical stability, high heat resistance, cold resistance, low friction coefficient, and is an excellent self-lubricating material, but has low mechanical properties, poor fluidity, and large thermal expansion.
Polytrifluoroethylene PCTEF (F3)
Applicable media:
Various organic solvents, inorganic corrosive liquids (oxidizing acids)
Using temperature: -195~120
Features: Heat resistance, electrical properties and chemical stability are second only to F4, mechanical strength, creep properties, and hardness are better than F4
Polypropylene: RPP
Applicable media: Aqueous solutions of inorganic salts, dilute or concentrated solutions of inorganic acids and alkalis.
Using temperature: -14~80
Features: One of the lightest plastics, its yield, tensile and compressive strength, and hardness are better than low-pressure polyethylene, with outstanding rigidity, good heat resistance, easy molding, and low cost. After modification, it has better dynamic resistance, fluidity, and bending elasticity.
Polyvinyl chloride: Rigid) PVC
Applicable media: Water resistance, concentrated alkali, non-oxidizing acid, chain hydrocarbon, oil and ozone, etc.
Use temperature: 0-55
Features: high mechanical strength, excellent chemical stability and dielectric properties, good oil resistance and aging resistance, easy to weld and bond, low price.
Polyvinylidene chloride PVDF (F2)
Use medium: resistant to most chemicals and solvents,
Use temperature: -70~100
Features: tensile strength and compression strength are better than F4, resistant to bending, weathering, radiation. Light and aging, etc., the biggest feature is good toughness and easy molding.
Polyolefin: PO
Applicable medium: various concentrations of acids, alkalis, salts and some organic solvents.
Use temperature: -58~80
Features: It is the most ideal anti-corrosion material in the world, and has been widely used in large-scale equipment and pipeline linings for rotational molding.
