A Schedule 80 PVC Van Stone Flange is a type of pipe flange used in plumbing and industrial applications. Unlike traditional flanges, a Van Stone flange is a two-piece design, consisting of a rotating ring (the actual flange) and a stub-end that is glued to the pipe. The key feature of a Van Stone flange is that the ring can rotate independently around the stub-end, making it easier to align the bolt holes when connecting to another flange or fitting.

Characteristics of a Schedule 80 PVC Van Stone Flange:

  • Material: Made from Schedule 80 PVC, which is thicker and stronger than Schedule 40 PVC, making it suitable for higher pressure applications.
  • Two-Piece Design: Includes a rotating ring (flange) and a stub-end. The ring is not glued to the pipe, allowing it to move freely.
  • Chemical Resistance: Like other PVC materials, it offers excellent resistance to chemicals, making it ideal for corrosive environments.
  • Temperature Range: Suitable for temperatures up to about 140°F (60°C).

How to Use a Schedule 80 PVC Van Stone Flange:

  1. Preparation:
    • Ensure that the pipe and flange are clean and free of debris.
    • Apply PVC primer and cement to the stub-end of the flange and the pipe.
  2. Assembly:
    • Insert the pipe into the stub-end of the flange and allow the cement to cure. The rotating ring should remain free to move.
    • Align the flange with the mating flange or fitting, rotating the ring to line up the bolt holes.
  3. Installation:
    • Place a gasket between the two flanges to ensure a leak-proof seal.
    • Insert the bolts through the aligned holes and tighten them evenly in a crisscross pattern to ensure an even seal.
  4. Final Inspection:
    • Check for any leaks after the system is pressurized. If necessary, adjust the bolts to ensure a proper seal.

Applications:

  • Chemical Processing: Ideal for systems transporting corrosive chemicals.
  • Water Treatment: Commonly used in systems that require easy assembly and disassembly.
  • Irrigation Systems: Used where higher pressure ratings are required.

Van Stone flanges are particularly useful in situations where you need to frequently disassemble and reassemble piping systems without worrying about misalignment of bolt holes.

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