The Volute Tongue (cut-water) is where the spiral starts. If the pattern is not precise here, it causes fluid turbulence and noise in the final pump. We use CNC-machined inserts at the tongue area to ensure the sharpest and most efficient flow transition.

We use a Multi-Piece Core Box. The core is made of hardened sand and placed inside the mold using "Core Prints" defined by the pattern. This creates the hollow spiral space where the water flows, ensuring perfectly smooth internal walls.

Not at all. We use Laminated Hardwood or Epoxy Resin, which are moisture-resistant. We also apply multiple layers of Polyurethane (PU) Lacquer, which seals the material and protects it from the damp environment of a sand foundry.

Yes. Our design features Interchangeable Flange Bosses. You can swap the flange part of the pattern to accommodate different thickness requirements or bolt-hole patterns without rebuilding the entire main casing body.

Since casings are often cast in Ductile Iron or Stainless Steel, we use material-specific Shrinkage Allowances (usually 1.2% to 2%). This ensures that after the molten metal cools and shrinks, the pump casing matches the exact design dimensions.