Static mixer with precision cast elements

A static mixer comprising:

• precision cast static mixer elements (1) arranged along a central axis (10), each precision cast static mixer element having a circumferential reinforcement region (4);
• intermediate elements (2) abutting the circumferential reinforcement region (4) and forming in combination with the precision cast static mixer elements a static mixer body of a preselected length with a periphery defined by the reinforcement region and the intermediate elements;
• and
• joints between the reinforcement region (4) and the intermediate elements (2) defining first and second continuous joint surfaces (40a, 40b and 20a, 20b) and mutually defining a seal formed between the first and second continuous joint surfaces between the reinforcement regions (4) and the intermediate elements (2);
• a first continuous entirely planar, circumferential joint surface defining at least one cut-out having an upwardly extending cavity;
• a second continuous entirely planar, circumferential joint surface adjacent a protrusion for extending into the at least one cut-out of the first continuous entirely planar, circumferential joint surface for positioning the reinforcement region and the intermediate elements at the seal of the first and second continuous entirely planar, circumferential joint surfaces with respect to each other;
• the first continuous entirely planar, circumferential joint surface defining the at least one cut-out having an upwardly extending cavity of sufficient dimension for receiving the protrusion adjacent the second continuous entirely planar, circumferential surface without obstruction within the cavity while permitting the first and second continuous entirely planar, circumferential joint surfaces to define the seal,
• whereby the first continuous entirely planar, circumferential joint surface defines an unobstructed planar surface to enable machining access for adjusting the length of the static mixer.