PVDF
PVDF (polyvinylidene fluoride) is a fluoropolymer with excellent resistance to acids, halogens, UV and high-purity requirements, usable up to about 140 °C. It is used for chemical process piping, valves, pumps, tank linings and semiconductor equipment.
What it is
PVDF combines the chemical resistance of fluoropolymers with good mechanical strength and easy processing: it can be machined, welded and extruded. It is very pure, with low extractables, which suits ultrapure water and pharma systems.
It is stiffer and stronger than PTFE, but has less chemical resistance to strong bases and some solvents.
Typical applications
- Chemical process pipes and fittings
- Valves and pump components
- Tank linings
- Ultrapure water and semiconductor systems
- Electrical insulation
Materials & grades
- PVDF sheet, rod and pipe
- PVDF copolymers
Points to consider
- Not suitable for strong bases (e.g. hot caustic) and some ketones.
- Weldable for fabricated equipment.
- Higher cost than PP or PVC but much wider chemical range.
- Excellent UV resistance for outdoor use.
Frequently asked questions
What is PVDF used for?
Chemical process piping, valves, pumps and linings, and ultrapure water systems.
PVDF or PTFE, which should I use?
PTFE has the widest chemical and temperature range; PVDF is stronger, stiffer and easier to machine and weld.
What temperature can PVDF handle?
Continuous service up to about 140 °C, with good strength retained across that range; above it, PTFE or PFA is usually chosen.