S Type Mixers A range of standard design static mixers, pre-manufactured with flanged ends and one injection nozzle. Three or four elements are supplied depending on flow regime. Available in uPVC and stainless steel. Please see our downloads section for the S-Type mixer data sheets. The S-Type range. Available in stainless steel and uPVC construction. All mixers have flanged end connections and 1 threaded injection boss.