BS ISO 21630:2007

Foreword
Introduction
1 Scope
2 Terms and definitions
3 Symbols and abbreviated terms
4 Guarantees
  4.1 Subjects of guarantees
  4.2 Conditions of guarantees
5 Execution of tests
  5.1 Subjects of tests
  5.2 Organization of tests
  5.3 Test arrangements
  5.4 Test conditions
6 Analysis of test results
  6.1 Translation of the test results to the guarantee
      conditions
  6.2 Measurement uncertainties
  6.3 Values of tolerance factors
  6.4 Verification of guarantees
7 Measurement of thrust
  7.1 Flow conditions of mixer thrust measurement
  7.2 Mixer thrust measurement method
  7.3 Uncertainty of measurement
8 Measurement of mixer electric power uptake
Annex A (informative) Checklist
Bibliography

Describes acceptance test methods for submersible mixers (hereafter "SM" or "mixer") used for mixing in wastewater and other applications where at least one system component is a liquid.

This International Standard prescribes acceptance test methods for submersible mixers (hereafter “SM” or “mixer”) used for mixing in wastewater and other applications where at least one system component is a liquid.

“Submersible mixer” is taken to mean a fully submersible aggregate consisting of a drive unit and an axial flow type impeller, and optional parts, such as shrouds, supporting the basic functions.

“Liquid” is taken to mean a body without capacity to accommodate shear stresses when at rest. This includes suspensions and dispersions (liquid/solid, gas/liquid and gas/liquid/solid), and non-Newtonian liquids, provided that a possible small yield stress does not prevent the liquid from flowing when agitated.