PFA Lined And PTFE Lined Butterly Valve BFV Flanged Type Wafer Butterfly Valves Pneumatic On Off Valve

PFA-Lined Butterfly Valves

PFA (Perfluoroalkoxy) Lining:

• Material Properties:

  • PFA is a type of fluoropolymer with properties similar to PTFE but with improved mechanical strength and higher thermal stability.
  • It offers excellent resistance to a wide range of chemicals, including strong acids, bases, and solvents.
  • PFA has a high melting point and can withstand temperatures up to around 260°C (500°F).

• Applications:

  • These valves are commonly used in chemical processing, petrochemical industries, pharmaceuticals, and any applications where highly corrosive substances are handled.
  • They are suitable for high-purity applications due to their non-reactive nature and low extractables.

• Advantages:

  • Superior chemical resistance.
  • High temperature tolerance.
  • Smooth, non-stick surface which helps in preventing build-up and contamination.
  • Good mechanical strength and durability.

PTFE-Lined Butterfly Valves

PTFE (Polytetrafluoroethylene) Lining:

• Material Properties:

  • PTFE is a well-known fluoropolymer known for its exceptional chemical resistance and low friction surface.
  • It is highly non-reactive, making it ideal for handling aggressive chemicals.
  • PTFE can operate at temperatures up to approximately 204°C (400°F).

• Applications:

  • Used extensively in chemical processing, food and beverage industries, pharmaceuticals, and water treatment plants.
  • Ideal for applications requiring clean and sterile conditions due to its non-stick, non-contaminating properties.

• Advantages:

  • Excellent resistance to a wide range of chemicals.
  • Non-stick surface, reducing the risk of clogging and build-up.
  • Low coefficient of friction.
  • Good thermal stability within its operational temperature range.

Comparison and Selection

• Chemical Resistance:

  • Both PFA and PTFE offer excellent chemical resistance, but PFA can handle slightly more aggressive conditions and higher temperatures than PTFE.

• Temperature Range:

  • PFA can withstand higher temperatures (up to 260°C) compared to PTFE (up to 204°C).

• Mechanical Strength:

  • PFA generally offers better mechanical strength and is less likely to deform under pressure or high temperatures compared to PTFE.

• Cost:

  • PFA-lined valves tend to be more expensive than PTFE-lined valves due to the material costs and the complexity of the lining process