A Cepex U-PVC butterfly valve is a type of valve used for flow control in piping systems, particularly in applications involving corrosive or chemical fluids. It features a PVC-U (unplasticized polyvinyl chloride) body and disc, with EPDM or FPM seals, and is designed for minimal pressure drop and resistance to many inorganic chemicals. These valves are available in various sizes and can be actuated manually, with a gearbox, or with electric or pneumatic actuators. 

Here's a more detailed breakdown:

Key Features:

• Material:

  The valve body and disc are typically made from PVC-U, known for its chemical resistance and durability. 

• Seals:

  EPDM or FPM (Viton) seals are used to provide a tight seal and prevent leaks. 

• Flow Characteristics:

  They offer excellent flow characteristics with minimal pressure drop. 

• Sizes:

  Available in a range of sizes from DN40 to DN300 (and potentially others depending on the specific model). 

• Actuation:

  They can be operated manually with a handle or gear, or automated with electric or pneumatic actuators. 

• Standards:

  They are often designed according to standards like EN ISO 16136 and can be found in accordance with the 97/23/EC Directive. 

• Chemical Resistance:

  PVC-U construction makes them suitable for a wide range of chemicals. 

• Applications:

  They are suitable for various applications, including irrigation, swimming pools, and general industrial use. 

Specific types:

• Wafer: Designed to fit between flanges.
• Lug: Designed to be bolted directly to the piping system.
• Industrial: Often used in more demanding industrial applications.
• Standard: A general-purpose series with good flow characteristics and minimal pressure drop. 

Benefits:

• Corrosion Resistance: PVC-U construction provides excellent corrosion resistance against many chemicals.
• Lightweight: PVC is a lightweight material, making the valve easier to install and handle.
• Cost-Effective: PVC valves are generally more cost-effective than metal valves, especially in corrosive environments.
• Low Maintenance: They are designed for minimal maintenance requirements.
• Reliable: Cepex valves are known for their reliability and long service life.