Raindrop Leather Windmill Buckets 3inch Range

Leather Windmill Buckets Pack of Two

The seals used in brass windmill pumps and differential compensators are called either Cups or Buckets.
They are therefore, either Pump Cups or Pump Buckets, or Diff Cups or Diff Buckets. They are available in Leather or Neoprene. The Pump Cups are sometimes referred to as having a large hole; while the Diff Cups are with a small hole

• A good pump and differential bucket should be:
  • exactly the same size as the pump (or differential) cylinder
  • shaped to suit the pump Plunger (the Alderdice Pump has a scalloped seat on the Plunger Block and Spacer)
  • permeable (so water can penetrate through the material and therefore lubricate the sliding surface)
  • highly frictionous
  • with built in lubricant.
  • expandable for its own wear.
• It is only leather that satisfies all these requirements.
• Neoprene (which are actually made from nitrile) buckets will last longer, but they tend to cause the windmill to operate under an increased load.

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