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Top Entry Industrial Mixer Critical Speed

Critical Speed is the rotational speed at which a top entry shaft mixer vibrates dangerously and can cause serious equipment damage. Every rotating shaft has a critical speed at which the natural harmonics of the shaft begin to build and increase the shaft deflection to the point where parts of the mixer may contact the mixing vessel. The mixer critical speed is determined by the material of the shaft, shaft diameter, positions and types of impellers and the type and spacing of the bearings. Critical Speed is best determined by the mixer manufacturer and is recommended to operate at least 20% away from that speed. Most top entry industrial mixers run at 80% or less of Critical Speed although some portable mixers may actually operate above the critical speed. As long as the speed ramp up is quick enough, the critical speed may be passed through safely.

WMProcess offers assistance on mixer sizing, tank geometries, optimizing your agitator for use with/without tank baffles and/or steady bearings, and we love to help with custom mixer applications – send us any of your inquiries and questions as we are happy to help.

Get Quotes Fast Highly Rated CS GMP Applications Solution Driven Made in USA

Get Quotes Fast

Highly Rated CS

GMP Applications

Solution Driven

Made in USA

Get Quotes Fast Highly Rated CS

Get Quotes Fast

Highly Rated CS

GMP Applications Solution Driven

GMP Applications

Solution Driven

Made in USA

Made in USA

Get Quotes Fast

Get Quotes Fast

Highly Rated CS

Highly Rated CS

GMP Applications

GMP Applications

Solution Driven

Solution Driven

Made in USA

Made in USA

 FROMHUNDREDS OF TOP ENTRY MODELS TO CHOOSE FROM

  • Large Scale Turbine Agitators
  • 1 Liter Lab Mixers to 10,000gal+ Agitators
  • Top Entry Mixers for sanitary agitation, food, chemicals, biofuel blending
  • Side entry mixers for blending in large storage tanks Click here for side entry mixers
  • Open top agitators, Flanged and Tri Clamp sealed mixers, Bottom Entry Agitation Click here for Sanitary Mixers and Agitators
  • Low shear mixing to aggressive high shear homogenizing and dispersing
  • Multishaft agitation and mixing systems for viscous creams, pastes, paints
  • Tank agitators in stainless steel, Hast C, Titanium Exotic allows, and coatings available
  • True mixer duty mechanical seals in single, double, and gas seal arrangements
  • Frac tank agitators for large scale mixing
  • Tanker truck tank mixers for milk tankers and chemical transport containers

Top Entry Industrial Mixer Torque

Mixing torque is the twisting force applied to an agitator shaft and impeller assembly. Having too little torque for blending will setup poor mixing and a mechanically unstable mixing system. Motors apply Torque through a drive system, into to a rotating shaft in order to achieve rotation in Top Mount Mixers. Torque is calculated by the amount of applied Horsepower (HP) to a shaft at a rotational speed (RPM). The type of impeller and the density of the material will determine the amount of applied HP required for a particular set of conditions. When designing a gear drive mixer, an application engineer will evaluate what mixer HP, speed, impeller size/type will be used to provide the mixing process results.

Depending on the mixer output speed, a gear ratio will be picked to provide the proper mixer speed and torque to handle the mixing application. The mixture viscosity, density, solids % and volume of the tank will all be included as variables in mixer sizing.

The higher the torque required for agitation, usually means the higher cost of the industrial mixer.

Torque per unit volume is often used in scale up and scale down applications. Torque in in-lbs is equal to (mixer hp / mixer rpm) x 63025.

So Torque is a key variable used in the process and mechanical design of top entry agitators. Blender torque is also used to design the tank nozzle for the mixer mount.

carboy orbital shaker

Also available! Orbital Shakers from White Mountain Process

Our Orbital Shakers are perfect for blending buffers, proteins, chromatography slurries and a great choice for single use mixing with either carboys or single use bags.

Orbital Lab Shakers are known for their ability to provide low shear and gentle blending, to more vigorous shaking and mixing action. Shakers are heavy duty and robust, easy to use, and extremely effective at mixing very quickly and uniformly.

Orbital Shakers typical options we can provide:

  • Biopharma ready, complete documentation packages, IQ/OQ optional, FAT testing optional.
  • Heavy Duty Large Volume Mixing and Small Volume blending
  • Fixed Speed or Variable Speed / High or Low Speed
  • Variable Speed digital display with digital countdown timer
  • Temperature controlled top plate typical
  • Explosion Proof and Hazardous Duty motors available
  • Remote Control Operation available
  • All Stainless Steel Models
    Incubator High Humidity and CO2 gassed models

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We also offer single-use and carboy mixers for laboratory use

.For top-quality, single-use mixing systems, contact White Mountain Process. Our single use mixers are erfect for biotech, pharmaceutical mixing, medical and other aseptic mixing and blending applications. Our customers find this system to be flexible, reliable, sanitary and remarkably easy to use.

Our Single Use Mixers can mix from ½ liter to 200 liters – with a single mixer. If more is required, we’ve designed our systems to be flexible enough to mix up to 5,000 liters with the same mixing action, even when using traditional mixing impellers.

This offers a simpler alternative to difficult-to-manage single use bags and tank liners commonly used in the industry. However, don’t let its simplicity fool you – this is no cheap, flimsy mixer. Our engineered lab mixer and tank systems meet high industry standards, and offer mixing impellers which can scale up or down. This means our single use mixers can be used for either pilot plant or production mixing processes, and other applications.

You’ll also be glad to know that like other WMProcess products, our Poly USP VI Mixing tank may be customized to suit your specific application. Choose to include tank baffles or not; order TC fittings welded to suit, and choose between other features such as dip tubes, vent filters and outlet valves, to be included if needed.

Contact White Mountain Process to discuss your project and intended applications. We can help you design a system unique to your needs, or a mixer flexible enough to mix a variety of media for nearly any imaginable application.

WMP-Carboy-Grid
sanitary carboy mixer

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