Heidolph 509-12000-00 BR 12 Stainless Steel Pivoting Blade Impeller 400mm Length, 8mm (mm) Shaft Dia , 2,000 Maximum Rpm

Blade and Half-Moon Impeller

• These impellers are recommended for applications which require average speed
• For mixing tasks with little or average viscosity
• With collapsible blade for narrow neck vessels

Precise working with an overhead stirrer depends on the right choice of the stirrer tool. When choosing a stirrer tool you have to consider its different characteristics and their effects. For example, the flow which the tool causes in the medium, the tool´s adequate field of application depending on the speed range, and the execution of the tool according to the viscosity it is destined for

Application examples:

• Gassing of liquids < 500 mPa s: Radial Flow Impeller
• Homogenizing and suspending in liquids < 500 mPa s: Propeller-Type or Blade Impeller
• Medium with a viscosity > 500 mPa s: Anchor-Type Impeller, Blade Impeller BR 13, VISCO JET®
• Stirring of gel: VISCO JET®

Please ensure that for radial flow, blade, half-moon and VISCO JET® impellers the beaker size and position of your impeller complies with the shown guideline to achieve superior mixing results

Operational guidelines

Position of the stirring tool

• In center
• Distance to the bottom (h3/d2): 0.3
• Diameter vessel (h1/d1)=1
• VISCO JET® diameter ratio (d2/d1): 0.4 - 0.6

Circumferential speed

• 3 - 15 m/sec: Radial Flow Impeller
• 2 - 5 m/sec: VISCO JET®, Blade and Anchor-Type Impeller