Dave Dickey

Latest Posts

• Re: (Last post: 8 years ago)
• Re: (Last post: 8 years ago)
• Re: Solid particle size distribution(Last post: 7 years ago)
• Re: Formula for position of impeller(Last post: 7 years ago)
• Re: Recommendation for small pilot plant batch mixer(Last post: 7 years ago)
• Re: (Last post: 7 years ago)
• Re: Suspending salt mixtures in a PVC solution(Last post: 7 years ago)
• Re: Calculating unbalanced hydraulic force(Last post: 7 years ago)
• Re: Service factor for an unbalanced hydraulic load(Last post: 7 years ago)
• Re: Calculating torque exerted by liquid(Last post: 7 years ago)
• Re: Mix throttled liquid/flash gas and hot gas(Last post: 7 years ago)
• Re: Hydraulic load calculations(Last post: 7 years ago)
• Re: Agitator force(Last post: 6 years ago)
• Re: Liquid mixing equation(Last post: 6 years ago)
• Re: Hydraulic load factor for water, oil mix(Last post: 6 years ago)
• Re: Design for an off-centered agitator shaft(Last post: 6 years ago)
• Re: Suspension agitation(Last post: 6 years ago)
• Re: Agitator design(Last post: 6 years ago)
• Re: Pitched-blade impeller direction(Last post: 6 years ago)
• Re: Agitator efficiency equation(Last post: 6 years ago)
• Re: Agitator speeds for different fluids(Last post: 6 years ago)
• Re: Agitator design(Last post: 6 years ago)
• Re: Calculating rpm power(Last post: 6 years ago)
• Re: Power consumption equation(Last post: 6 years ago)
• Re: Follow-up to previously answered impeller diameter question(Last post: 6 years ago)
• Re: Agitator type for batch reactor(Last post: 6 years ago)
• Re: Power requirement for a gearbox(Last post: 6 years ago)
• Re: Power requirement for a constant stirring vessel(Last post: 6 years ago)
• Re: Agitator capable of dispersing air through the shaft/blades(Last post: 6 years ago)
• Re: Suitable reactor capacity(Last post: 6 years ago)
• Re: Motor requirements for varying fluid viscosity(Last post: 6 years ago)
• Re: Sizing mixers(Last post: 6 years ago)
• Re: Agitator design procedures(Last post: 6 years ago)
• Re: Blended viscosity and stirred tank content relation(Last post: 6 years ago)
• Re: Calculate "downward force" on an impeller(Last post: 6 years ago)
• Re: Baffle fabrication(Last post: 6 years ago)
• Re: Horsepower calculations for a specific viscosity(Last post: 6 years ago)
• Re: Mixing Time and Multipropeller(Last post: 5 years ago)
• Re: (Last post: 5 years ago)
• Re: (Last post: 5 years ago)
• Re: Designing a Mixing Tank(Last post: 5 years ago)
• Re: Efficient Impeller Blade or Mixer(Last post: 5 years ago)
• Re: Input power of electromotor, power of gearbox and the safety factor(Last post: 5 years ago)
• Re: Jet Mixers vs. Mechanical Mixers(Last post: 5 years ago)
• Re: Pilot plant digester mixing(Last post: 5 years ago)
• Re: Designing a Support Bracket for a Baffle(Last post: 5 years ago)
• Re: HP Motor Size Requirements(Last post: 5 years ago)
• Re: Proposing a suitable tank volume for a specific viscosity(Last post: 5 years ago)
• Re: Power estimation for turbulent and laminar mixing(Last post: 5 years ago)
• Re: Reducing dissolving time(Last post: 5 years ago)
• Re: Redesigning the impeller blade for a batch polyurethane tank(Last post: 5 years ago)
• Re: Making an agitator for a composting unit(Last post: 5 years ago)
• Re: Shaft and gearbox size(Last post: 5 years ago)
• Re: Achieve good top to bottom slurry suspension(Last post: 5 years ago)
• Re: Calculating the Effect of Baffles on Power Calculations(Last post: 5 years ago)
• Re: What are the power numbers for standard agitator impellers?(Last post: 5 years ago)
• Re: Mixing thixotropic fluid(Last post: 5 years ago)
• Re: Finding The Right Agitator Design for PVC Production(Last post: 5 years ago)
• Re: Mixing Time and Residence Time(Last post: 5 years ago)
• Re: Calculating the Power Requirement for Mixing(Last post: 5 years ago)
• Re: Merging Two Gas Streams(Last post: 5 years ago)
• Re: Calculating The Bending Moment on a Mixer Shaft(Last post: 5 years ago)
• Re: Determining the Agitator Shaft Loading and Power(Last post: 5 years ago)
• Re: Understanding The Baffle Effect(Last post: 5 years ago)
• Re: Specifications for Agitating Hot Water(Last post: 5 years ago)
• Re: Can you predict the vortex depth?(Last post: 4 years ago)
• Re: Finding the Hydraulic Load(Last post: 4 years ago)
• Re: What is a suitable mixer for square tanks?(Last post: 4 years ago)
• Re: What type of impeller ensures good dispersion?(Last post: 4 years ago)
• Re: Why are identical product units drawing different electric current?(Last post: 4 years ago)
• Re: What is the formula for laminar mixing?(Last post: 4 years ago)
• Re: Planning the Perfect Mixing Tank(Last post: 4 years ago)
• Re: What is a suitable mixer design for liquid detergents?(Last post: 4 years ago)
• Re: How do we calculate unbalanced horizontal load, amplitude and mass movement?(Last post: 4 years ago)
• Re: Calculating the Agitator Torque For Adhesive Production(Last post: 4 years ago)
• Re: Can I simplify mixing calculations for a bottom-mounted impeller?(Last post: 4 years ago)
• Re: Are there limitations to the Zwietering correlation for suspending solids in liquids?(Last post: 4 years ago)
• Re: How much horsepower is required to mix this specific material?(Last post: 4 years ago)
• Re: Which agitator seal will work best for outlet piping?(Last post: 4 years ago)
• Re: What are the power requirements for turbulent mixing?(Last post: 4 years ago)
• Re: Are power requirements for multiple impellers additive?(Last post: 4 years ago)
• Re: Mixing: What's causing the blades to bend?(Last post: 4 years ago)
• Re: When is it appropriate to use a recirculation loop?(Last post: 4 years ago)
• Re: How do you calculate the power number of an impeller?(Last post: 4 years ago)
• Re: How do I calculate the kLa of a mixed gas system using 75% air and 25% O₂?(Last post: 4 years ago)
• Re: Why does the motor trip on the anchor impeller with wall baffles?(Last post: 4 years ago)
• Re: Can you provide the power number for anchor-type impeller and Cowles disc impeller?(Last post: 4 years ago)
• Re: How can I update the efficiency of very old mixers?(Last post: 4 years ago)
• Re: How do I determine the mixer design size of the impeller, the baffle plates and motor?(Last post: 4 years ago)
• Re: Is chemical "Injection" used anywhere other than the carwash industry?(Last post: 4 years ago)
• Re: How do I determine torque?(Last post: 3 years ago)
• Re: What are the problems with running a mixer in air?(Last post: 3 years ago)
• Re: Can you recommend an agitator that will fully suspend and dissolve salt?(Last post: 3 years ago)
• Re: What is the best indicator of performance and efficiency of a mixer?(Last post: 3 years ago)
• Re: For mixing, how do I convert from hydraulic power to an electric motor?(Last post: 3 years ago)
• Re: Is my mixer size too large?(Last post: 3 years ago)
• Re: How do you determine the power number for a mixing system?(Last post: 3 years ago)
• Re: What is the general formula of agitator flow capacity?(Last post: 3 years ago)
• Re: What is the torque required for speed reducer and what horsepower is required to run it smoothly?(Last post: 3 years ago)
• Re: What are the specs to construct a computer controlled Agitation Experimental Module?(Last post: 3 years ago)
• Re: How do you calculate the power required for helical impeller mixer?(Last post: 3 years ago)
• Re: How do I design a multi-concentric shaft for a fixed tank unit?(Last post: 3 years ago)
• Re: Are there conditions when the agitation system cannot suspend a catalyst?(Last post: 3 years ago)
• Re: How do you estimate the torque needed for a small chopper/blender assembly?(Last post: 3 years ago)
• Re: How do you determine the liquid force on the baffle?(Last post: 3 years ago)
• Re: Is there a means to accurately have the deflection measured and to check center of shaft relative to bottom bearing?(Last post: 3 years ago)
• Re: Can you help me determine impeller diameter and torque?(Last post: 3 years ago)
• Re: Can you provide a guide to baffles?(Last post: 3 years ago)
• Re: Can I estimate how much I need blend using the recirculation loop?(Last post: 3 years ago)
• Re: What size impeller will disperse fine carbon powder in ethanol/water mixture?(Last post: 3 years ago)
• Re: Can you suggest motor speed and RPM for a viscosity index improver kettle?(Last post: 3 years ago)
• Re: What is the maximum viscosity of fluid I can mix with a certain agitator?(Last post: 3 years ago)
• Re: Can you tell me how to design a simple mixer for mixing solids and liquids?(Last post: 3 years ago)
• Re: Can you suggest a motor horse power and gearbox torque?(Last post: 3 years ago)
• Re: How do I calculate the size of the dissolution vessel?(Last post: 3 years ago)
• Re: How can I size a dissolution unit?(Last post: 3 years ago)
• Re: Can you suggest a mixer for minimal suspension of slowly settling particles?(Last post: 3 years ago)
• Re: How do I calculate the agitator power in terms of increasing volume?(Last post: 3 years ago)
• Re: How do I calculate the agitator power in terms of volume increasing?(Last post: 3 years ago)
• Re: Can you help me size a mixer?(Last post: 3 years ago)
• Re: What speed should I target for maximum agitation?(Last post: 3 years ago)
• Re: Is my mixer sizing correct?(Last post: 3 years ago)
• Re: How do we determine residence time in the dissolution tank?(Last post: 3 years ago)
• Re: Is there any formula for calculating the height of an anchor agitator?(Last post: 3 years ago)
• Re: Can you offer an equation to determine mixer torque based on a viscosity?(Last post: 3 years ago)
• Re: Is my mixer design correct?(Last post: 3 years ago)
• Re: Is my motor the appropriate size for the mixing intensity I need?(Last post: 3 years ago)
• Re: Is my mixer design correct?(Last post: 3 years ago)
• Re: How can I stop fluctuations at the fluid surface?(Last post: 3 years ago)
• Re: Is there a formula to calculate axial thrust?(Last post: 3 years ago)
• Re: What could cause drag to where the rpm output isn't constant?(Last post: 3 years ago)
• Re: For mixing solids application what is the recommended baffles length?(Last post: 3 years ago)
• Re: Will a change occur in impeller power number if we change the blade angle?(Last post: 3 years ago)
• Re: Is there a formula available for the Reynolds number, power number and correction factor?(Last post: 3 years ago)
• Re: How do I determine the thermal energy introduced into the system by dispersion blades?(Last post: 3 years ago)
• Re: Can you offer advice for impeller diameter and speed?(Last post: 3 years ago)
• Re: How would you design an agitator for equalization tank of wastewater treatment plant?(Last post: 2 years ago)
• Re: What is the best way to minimize air bubbles?(Last post: 2 years ago)
• Re: How do you calculate pipe diameter, mixer size and type, and other design parameters?(Last post: 2 years ago)
• Re: What are the required changes for re-rating a mixer?(Last post: 2 years ago)
• Re: How do you scale a flat-blade mixer for a small container?(Last post: 2 years ago)
• Re: How would I determine a dimensionless mixing coefficient?(Last post: 2 years ago)
• Re: How do I calculate the Reynolds Number of a multiple-blade agitated vessel?(Last post: 2 years ago)
• Re: How do I calculate the dynamic force on the agitator?(Last post: 2 years ago)
• Re: What are the motor powers and shaft diameters for these agitators?(Last post: 2 years ago)
• Re: What is causing the mechanical problems with agitators?(Last post: 2 years ago)
• Re: What is the best mixer for solids and liquids?(Last post: 2 years ago)
• Re: What type of impeller and engine power should I use for the following service?(Last post: 2 years ago)
• Re: Why is the mixer getting stuck?(Last post: 2 years ago)
• Re: How do you create an emulsion?(Last post: 2 years ago)
• Re: Is creating a vortex the best way to achieve the greatest amount of composition and temperature uniformity?(Last post: 2 years ago)
• Re: Can you calculate the power required by an anchor impeller to mix a fluid of known viscosity and density?(Last post: 2 years ago)
• Re: Can you provide guidance on mixer design for an agitator mounted on a tank with these dimensions?(Last post: 2 years ago)
• Re: What is the type of blade to be used for mixing slurries of high viscosity?(Last post: 2 years ago)
• Re: What's the best way to check mixing design?(Last post: 2 years ago)
• Re: How can we estimate the Reynolds number?(Last post: 2 years ago)
• Re: What is the ideal diameter-to-length ratio for a vessel?(Last post: 2 years ago)
• Re: How do we modify a holding container to a mixing container?(Last post: 2 years ago)
• Re: How do we mix a solid slurry and solvent for best results?(Last post: 2 years ago)
• Re: Can you suggest proper mixing design?(Last post: 2 years ago)
• Re: How can we improve our mixing?(Last post: 2 years ago)
• Re: How do I calculate the power required by a motor?(Last post: 2 years ago)
• Re: What if we can't use a top-mounted mixer?(Last post: 2 years ago)
• Re: Can you offer advice on a horizontal ribbon impeller?(Last post: 2 years ago)
• Re: What's the easiest way to do impeller power calculations?(Last post: 2 years ago)
• Re: Can you offer guidance on polymer mixing and wastewater?(Last post: 2 years ago)
• Re: Is there a science for sizing submersible mixers?(Last post: 2 years ago)
• Re: Is there a science for sizing submersible mixers?(Last post: 2 years ago)
• Re: Is there a textbook that I can purchase that works through mixing calculations?(Last post: 2 years ago)
• Re: Can you offer specifications regarding the ideal RPM required for optimum mixing of lime slurry?(Last post: 2 years ago)
• Re: Where should the impellers be located?(Last post: 2 years ago)
• Re: How can we ensure a successful scale-up?(Last post: 2 years ago)
• Re: How do I calculate agitator shaft size?(Last post: 2 years ago)
• Re: Can we thoroughly mix without breakage of the CPGs?(Last post: 2 years ago)
• Re: Is there a calculation to determine the difference in mixing when I change an agitator?(Last post: 2 years ago)
• Re: During scale-up, which dimensionless number should match?(Last post: 2 years ago)
• Re: How do I build a mixer for a wide range of liquid detergents?(Last post: 2 years ago)
• Re: Does a method exist for determining blade angle when the use of a bevel protractor is not possible?(Last post: 2 years ago)
• Re: How can I calculate the power number and mixing time?(Last post: 2 years ago)
• Re: How do we select tank size and agitators?(Last post: 2 years ago)
• Re: Is there some correlation to estimate the Np and Power consumption for anchor and helical ribbon impellers for non-newtonian fluids?(Last post: 2 years ago)
• Re: I want to make a portable stirrer for mixing various types of liquid soaps. Can I use an electric drill?(Last post: 2 years ago)
• Re: What would be the optimum blade size, speed, motor power required for a power stirrer?(Last post: 2 years ago)
• Re: Can I use any correlation factor of liquid mixing for solid suspension?(Last post: 2 years ago)
• Re: How can I calculate my power number and power required for two different impellers?(Last post: 2 years ago)
• Re: How do I design my agitation system?(Last post: 2 years ago)
• Re: Do plastic mixing shafts and propellers exist?(Last post: 1 year ago)
• Re: What's the best way to mix in a horizontal, cylindrical vessel?(Last post: 1 year ago)
• Re: We would like to have a general idea of pumping number for our reactors. Can you help us with blend-time calculations?(Last post: 1 year ago)
• Re: What is the best way to approach gas-gas mixing?(Last post: 1 year ago)
• Re: What kind of agitator is suitable for a range of viscosities?(Last post: 1 year ago)
• Re: Is a UDIF impeller suitable?(Last post: 1 year ago)
• Re: How do I select the optimal location for an impeller inside a tank?(Last post: 1 year ago)
• Re: How can we ensure mixing efficiency at different scales?(Last post: 1 year ago)
• Re: How can we achieve an optimum mixing system?(Last post: 1 year ago)
• Re: How much does stirring torque need to increase if viscosity doubles?(Last post: 1 year ago)
• Re: What are the differences between top-mounted and side-entry mixers?(Last post: 1 year ago)
• Re: How can we ensure mixing efficiency in non-geometric scale-up?(Last post: 1 year ago)
• Re: What size motor is required for various mixing vessels?(Last post: 1 year ago)
• Re: Which is better, a propeller mixer or a jet nozzle?(Last post: 1 year ago)
• Re: What are the key parameters when scaling up sonication?(Last post: 1 year ago)
• Re: What is the suggested rpm and motor speed for an anchor impeller?(Last post: 1 year ago)
• Re: What is the required power for an anchor agitator?(Last post: 1 year ago)
• Re: How fast should the agitator be in a mix tank?(Last post: 1 year ago)
• Re: What is your advice on a helical ribbon mixer/transport device?(Last post: 1 year ago)
• Re: What is a good design for a stirred tank mixer?(Last post: 1 year ago)
• Re: What's the best way to calculate mixing time and volume turnover with multiple impellers?(Last post: 1 year ago)
• Re: Is blending wax with a solvent a bad idea?(Last post: 1 year ago)
• Re: How do I improve mixing in the drum?(Last post: 1 year ago)
• Re: How do we ensure two liquids at different temperatures are mixed properly?(Last post: 1 year ago)
• Re: How can I account for the multiple impeller difference when scaling?(Last post: 11 months ago)
• Re: What are the HP/Torque requirements for a vertically agitated tank?(Last post: 11 months ago)
• Re: Will light components be able to settle out if the tank sits? (Last post: 11 months ago)
• Re: How do I calculate the forces on a baffle? (Last post: 11 months ago)
• Re: How do I minimize chunks that build up on my impellers?(Last post: 11 months ago)
• Re: Is there a formula for mixer speed?(Last post: 10 months ago)
• Re: What are the advantages/disadvantages of a parallel-shaft vs. right-angle gear drive?(Last post: 10 months ago)
• Re: Is there a general formula to apply to a ribbon blender?(Last post: 10 months ago)
• Re: How do I improve the particle size reduction while minimizing the heating?(Last post: 10 months ago)
• Re: Can you calculate the power required by an anchor impeller to mix a fluid of known viscosity and density?(Last post: 10 months ago)
• Re: How do I calculate agitator power?(Last post: 8 months ago)
• Re: Is our mixer design efficient?(Last post: 8 months ago)
• Re: Is there a formula for outer and inner ribbon pitch for a ribbon mixer?(Last post: 8 months ago)
• Re: Can you help me sort out the power consumption of the impeller?(Last post: 7 months ago)
• Re: Can you offer an agitator blade design?(Last post: 7 months ago)
• Re: What are the HP/Torque requirements for a vertically agitated tank?(Last post: 11 months ago)
• Re: Will light components be able to settle out if the tank sits?(Last post: 11 months ago)
• Re: Is there a formula for mixer speed?(Last post: 10 months ago)
• Re: What are the advantages/disadvantages of a parallel-shaft vs. right-angle gear drive?(Last post: 10 months ago)
• Re: Can you suggest a mortar mixer?(Last post: 6 months ago)
• Re: How do I calculate Reynolds Number?(Last post: 5 months ago)
• Re: Can we use helical blades for mixing liquid of viscosity 100,000 cP?(Last post: 5 months ago)
• Re: How Do I Estimate The Torque For An Impeller Agitator?(Last post: 4 months ago)
• Re: How can we best achieve homogeneity with our blend time?(Last post: 4 months ago)
• Re: How Do I Estimate The Torque For An Impeller Agitator?(Last post: 4 months ago)
• Re: How can we best achieve homogeneity with our blend time?(Last post: 4 months ago)
• Re: What is the recommended vessel design for a rotor-stator impeller for particle size reduction?(Last post: 3 months ago)
• Re: Where can I find information on a simple paddle in an unbaffled system?(Last post: 3 months ago)
• Re: What is the recommended vessel design for a rotor-stator impeller for particle size reduction?(Last post: 3 months ago)
• Re: Will prior densification of components affect the homogeneity of mixing?(Last post: 3 months ago)
• Re: What is the power number for 3-blade segment impeller?(Last post: 2 months ago)
• Re: What is the power number for 3-blade segment impeller?(Last post: 2 months ago)
• Re: Can you suggest a suitable anchor, shaft size and motor power for my reactor?(Last post: 2 months ago)
• Re: Can you suggest a suitable anchor, shaft size and motor power for my reactor?(Last post: 2 months ago)
• Re: Is there a way to calculate flow out of a rotor stator mixer?(Last post: 2 months ago)
• Re: Is there any method to calculate required mixing hours for the effects of API gravity difference?(Last post: 26 days ago)
• Re: Do I need to calculate the Froude number for a paddle blender?(Last post: 9 days ago)
• Re: Can you help me design a mixer for liquid soap?(Last post: 9 days ago)