How do I choose a mixing impeller?
To choose an impeller the volume of the mixture, the size of the
mixing vessel and the viscosity of the mixture should be known. The
diameter of the mixing blade should measure one third of the diameter of
the vessel, and be placed a distance of one third the diameter of the
vessel up from the bottom of the vessel.
For thicker mixtures, use a square or “U” shaped anchor paddle.
These paddles have more surface area to contact the thick product being
mixed. Because thicker mixtures are usually mixed more slowly a paddle
diameter closer to the full diameter of the vessel can be used so that
the product close to the edge of the vessel is mixed. (A150, A250 are
examples of square blade paddles; U022, U044, U055, U510 or A183 are
examples of anchor paddles).
The paddle I need is not listed on your website. Can you make what I need?
We are happy to make custom paddles. Email or fax a drawing
showing the specifications you need and a quotation outlining a part
number, price and delivery will be emailed or faxed back for approval.
What is electropolishing?
All stainless steel impellers and blades from Caframo are
electropolished. Electropolishing is an electrochemical treatment
performed on stainless steel to obtain a smooth, corrosion-resistant
finish. This process also passivates the stainless steel by removing
elemental iron and increasing the chromium concentration on the surface
and nickel just beneath. The result is a chemically inactive part. Note
that the process does not coat the part.
Along with the improved appearance, electropolishing provides the
Reduces stress-related cracking and metal fatigue
Increases the life span of the part
Optimizes sterilization as parts are easy and quick to clean
Electropolished parts are used in the following industries:
How do I reduce the vortexing I am experiencing with my propeller?
A baffle can be used in the vessel to reduce vortexing or the
stirrer can be rotated slightly in the clamp so that the mixing shaft is
not perpendicular. With the impeller on an angle, the vortex is broken
and the introduction of air is minimized.
What are all the parts I need to start mixing?
To start mixing the following parts are needed: stirrer motor,
clamp, stand and mixing impeller. Go to the “Products” section to find
the stirrers and accessories available. The Caframo BDC250 Petite
stirrer comes as a package. It includes the stirrer motor, integral
clamp, stand, and two mixing impellers (axial and straight blade).