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Specialty Impellers
Prop R Mix now offers a wide range of mixing impeller designs for laboratory, pilot plant and production blending.
Sizes range from 3" diameter propellers to 100" diameter special purpose impellers.
Prop R Mix can provide four bladed axial, radial, or custom turbine designs along with high efficiency hydrofoils. All are available with either welded or bolted blade construction. Shaft sizes from 1/2" to 2 1/2" diameter can be accommodated.
Materials of construction include 304 or 316 L grade stainless steel, carbon steel, Carpenter 20, and Hastelloy C. PVC, rubber, and Teflon coatings are also offered.
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4 Blade Axial
Impeller
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High Efficiency
Hydrofoil Impeller
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6 Blade Ruston
Impeller (Adjustable)
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4 Blade
Radial Impeller
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Folding
Propeller
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Saw Tooth
Propeller
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TERMINOLOGY
The following are often used terms in describing Propellers.
Pitch- This defines the angle of the blade and its relationship to the diameter of the propeller. For industrial applications either a square pitch or steep pitch (sometimes refered to as "super pitch") is used. In terms of pitch ratios, the above are often refered to as 1.0 and 1.5 pitch respectively.
Hand- Propellers are either "Left Hand" or "Right Hand". When the propeller is viewed from the blade edge or its side, the blade is angled upward to the left (Left Hand) or upward to the right (Right Hand).
See illustration.
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Generally a 1.5 or steep pitch prop will produce 50 to 75% higher flow than a square pitch. However, it requires twice the horsepower for a given shaft speed.
In 95% of industrial mixing applications, a left handed propeller is used in conjunction with the mixer shaft turning clockwise (viewed from the motor end). This creates a downward flow to produce optimal tank turnover or mixing. If the motor is wired to run counter clockwise the pumping direction is upward. In a limited number of applications, such as draft tubes, this is desirable. A right hand propeller performs just the opposite - upward for clockwise rotation and downward for counter-clockwise rotation.
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