Philadelphia

Side-Entry Mixers

The Belt Side Entry Mixer (BSER) mixer enables operators to improve efficiency, blend product or oils more rapidly, and allow for timely and economical maintenance in the field. The BSER includes the Advanced Pitch Propeller that creates a stronger collimated flow across the tank for up to a 40% improvement in efficiency.

• High-torque toothed belt drives provide long and trouble-free mixer operation
• Rigid motor mounting for better reliability and extended drive belt life
• Cartridge seal for easy replacement in the field
• Positive-locking, corrosion-resistant shut-off device prevents leaks
• Swivel angle mixers available

Top-Entry Mixers

PVE 12-16 Mixer Drive: This mixer drive reliably handles extreme shock loads without any compromise in performance. Featuring precision-ground, surface-hardened helical gearing, the PVE 12-16 delivers a smooth, strong torque flow. The unit’s solid alloy steel shaft is larger in diameter than standard designs that provides stiffness and strength. The output shaft bearings easily withstand high impeller loads with a minimum L-10.

PVE 01/03 Series Mixer Drive: The compact PVE 01/03 Series Mixer Drive is ideal for applications requiring a limited footprint. It is constructed to withstand corrosive or caustic environments, high temperatures and harsh weather.

• Sloped one-piece cast cover keeps rainwater out of the housing
• Dry-well integrated into the lower housing prevents oil leakage and product contamination
• Parallel output shaft connections handle overhung and fluctuating loads
• Gear housings are reinforced and stress relieved to withstand all static and dynamic loading
• Gears are designed to AGMA standards
• Piloted motor adapters eliminate shimming at installation
• All drives can incorporate vessel lip seals, packed glands or single/double mechanical seals
• Can be supplied as ATEX approved for categories 1, 2, and 3

UniFirst 4000 Series Mixer Drive: The UniFirst mixers’ gearbox effectively handles demanding mixing applications in a reduced size without sacrificing torque capacity. It is constructed to withstand corrosive or caustic environments, high temperatures and harsh weather.

• Sloped one-piece cast cover keeps rainwater out of the housing
• Dry-well integrated into the lower housing prevents oil leakage
• All gears and bearings are designed to handle overhung and fluctuating loads
• Closed grain cast iron housing includes open tank mounting configurations
• Input and intermediate shaft design reduce deflections
• Oversized shoulder eyebolts facilitate safe lifting
• Highly efficient and durable C-Face motors with piloted motor adapters eliminate shimming at installation

Raven 3800 Series Mixer Drive: Engineered to handle even the most rigorous processes, the Raven Mixer Drive withstands high temperatures, harsh conditions and fluctuating loads.

• Carburized and ground helical gears provide many years of quiet operation
• Features piloted C-face motor mount design
• Self-lubricating at theoretical zero RPM
• End cover is engineered to prevent leaks and minimize motor vibrations
• Features tapered roller bearings throughout gearboxes
• Mixer housing inspection windows allow convenient internal inspection
• Extra gusseting provides rigidity
• Drywell designs prevent oil leaks from the output shaft
• Optional Guardian Package provides simple, fast, accurate oil sampling

Impellers

Philadelphia axial flow and radial flow impellers are engineered to serve the demanding mixing needs of oil and gas, chemical and water and wastewater treatment applications.

Axial Flow:

Flue Gas Desulfurization Impeller – FGD (APII):

• The next generation of side-entry gas dispersion and solid suspension for flue gas desulfurization applications
• New design combines flow enhancing geometry with blade tiplets to provide a long impeller life
• Excellent gas dispersion performance

Anti-Ragging Anoxic Impellers (ARI-2):

• Specifically designed for the water and wastewater treatment industry
• Achieve equivalent mixing performance to standard hydrofoil impellers at a lower power draw with increased cost savings
• Blades feature a swept back design to prevent accumulation of fibrous rags found in wastewater basins
• The impeller provides superior mixing in the anoxic and anaerobic selector zones as well as flocculation applications where gentle mixing is required

Advanced Pitch Propeller:

• Side-entry propeller produces the most efficient flow profile resembling a fluid jet
• The discharge dynamics of the propeller resemble a free jet so closely that the same physics can be applied to describe performance (other side entering propellers fail at producing a completely axial jet)
• Patented circular rake and corresponding fluid flow characteristics results in lower mixer horsepower draw for a similar performance when compared to marine-style propellers

High Solidity Axial Flow Hydrofoil (MHS):

• Used for solids suspension applications when the solids concentration reaches a point where the particles influence the slurry viscosity and require an impeller designed for slightly viscous mixing applications
• The MHS Hydrofoil agitator impeller shares efficiency benefits with the LSV in terms of hydraulic efficiency, low power number, and solid suspension performance when compared to a Pitched Blade Turbine (PBT)
• Wider blades and slightly higher power number (compared to the LSV) enable it to operate in low viscosity shear thinning slurries and fluids
• For operation in gas dispersion applications utilizing up-pumping configurations, the MHS serves as a secondary dispersing/blending impeller to compliment the lower primary gas dispersing impeller in high gas load applications such as fermenters
• In addition, the impeller can be used in three-phase, solid-liquid-gas, mineral applications where relatively low gassing duty and relatively high solids concentration are present

Low Solidity Axial Flow Hydrofoil (MHE):

• Features a robust mixer design
• Can be located lower in the vessel to accommodate both low and high liquid level operation, thereby reducing mechanical loads and not sacrificing good mixing characteristics

Low Solidity Axial Flow Hydrofoil (LSV):

• A simply constructed impeller, the LSV or low solidity hydrofoil delivers a high pumping capacity for fast blending or solid suspension in water-like or low viscosity systems
• Hydrodynamically efficient, the LSV produces a higher degree of axial flow discharge compared to a conventional Pitch Blade Turbine (PBT)
• Suspends solids for less energy than a PBT making it an ideal solution for energy saving upgrades

Non-Newtonian/High Viscosity:

• Ideal for blending of different viscosities and processes where the rheology or viscosity evolves over time (such as transitions from laminar to turbulent flow in polymerization, or food applications)
• Used for transitional and laminar blending applications
• Provides minimal blend times and excellent product homogeneity
• Specially designed mixing solutions utilizing the CounterFlow Impeller are capable of carrying the process through any viscosity swings and upsets while maintaining optimal blending performance
• Also performs well in deep laminar flow often reserved for technologies such as helical ribbons and anchor impellers
• In specific applications where wall scraping is not required, the mixer will feature a smaller gearbox and lower power input for superior mixing results
• Reynolds numbers on the order of 0.1 have been successfully mixed demonstrating superior performance to ribbons
• Laboratory testing of client’s samples is available

Radial Flow:

Anti-Ragging GDX – Submerged Turbine Aerator:

• Intended for submerged turbine aeration in water and wastewater treatment plants
• The three-blade version of the GDX turbine aerator combined with a sparge ring supplied by a blower disperses gas and feeds oxygen to the biology
• The superior design of the anti-ragging GDX impeller optimizes the process requirements with the impeller performance
• Gassing rates decrease in these types of biological processes
• By removing three of the blades, the impeller cost is optimized with the process requirement
• The blade profile sweeps back to prevent the impeller from collecting fibrous rags found in wastewater treatment plants which cause the mixing system to fail
• The submerged turbine aeration system functions as a hybrid between a diffusor/compressor-only aeration system and a mixer-only low speed surface aerator system
• Especially suited for swing zones that need to operate with both the air on and off

Low Speed Surface Aerator:

• Specifically designed for low-speed aeration to provide optimum surface turbulence and oxygen transfer
• Optimum liquid phase mixing ensures oxygen-depleted liquid is recirculated to the mass transfer dispersion area in the most efficient manner, maximizing aeration efficiency or oxygen transferred for a specific energy input

Pitched Blade Radial Flow Turbine (PBT):

• As the first evolution of the flat blade turbine, the Pitched Blade Turbine or PBT was designed to angle the blades to promote more axial than radial flow
• Depending on the angle of the blade pitch, 45 degrees being the most common, the impeller axial to radial flow ratio can be tuned for the specific process
• The 45-degree PBT is most commonly and efficiently applied in blending and dispersion operations where higher power and turbulence is required, such as powder incorporation, heat transfer and rapid mixing
• A 32-degree blade pitch is also available

Curved Blade Radial Flow Turbine (CBT):

• Features an original impeller design
• Facilitates batch solid suspension applications where the need to remove all solids from the tank during a draining phase is imperative, and axial flow turbines mix the bulk of the tank until the liquid level falls below the lowest axial turbine
• To mix the lower portion of the tank, the shaft can be extended to the bottom of the tank and a smaller radial flow CBT called a tickler turbine can be installed. This impeller continues to mix the remaining volume until draining completes.
• The swept back blade profile permits start-up in settled bed

Vertical Flat Blade Turbine (VFBT) Radial Flow Impeller:

• An early impeller design for stirred tank applications
• Simple geometry of the Flat Blade Turbine impeller facilitates radial stirring and blending
• Can create zonal mixing flow patterns to turn a stirred tank into an approximated plug flow reactor
• By installing horizontal baffles, back mixing can be reduced between stages and reactor designs can be optimized
• Suitable for heat transfer applications

Super Low Shear Sentinel Radial Flow Impeller (SLS):

• Provides minimum fluid shear while maintaining a good blending characteristic in low viscosity applications such as flocculation
• Produces more power compared to other impellers, reducing the necessary impeller speed required for mixing
• A lower impeller speed with a larger pumping rate provides good vessel circulation and reduces local velocity gradients that cause damage to sensitive crystallizations and flocculation

Gas Foil (GDX) Radial Flow Impeller:

• The most advanced gas dispersing radial flow turbine on the market
• Features the lowest reduction in impeller power draw under gassed conditions, eliminating the need for a VFD or two-speed motor
• The parabolic blade shape provides the most hydrodynamically advanced geometry to handle the highest of gassing duties
• Ideal for aerobic fermenters and mass transfer limited gas-liquid reactors

Smith Turbine (ST) Radial Flow Disk Blade Turbine:

• The next evolution of the radial flow disc turbine, the Smith Turbine, was designed to reduce the power decrease of the impeller under gassed conditions
• Can handle a larger gassing duty than the Rushton before flooding

Rushton (RT) Radial Flow Disk Blade Turbine:

• The original disc blade turbine invented in the 1950s, the standard Rushton Turbine model features 6 flat vertical blades (4 and 8 blade options are common)
• In low- to medium-duty gas dispersion applications, the Rushton power input will drop due to the gas presence up to 60% requiring a variable frequency drive or two-speed motor
• Should not be utilized for solid-liquid mixing applications
• Rushton Turbines are essential to successful processing in which gas dispersion demand is critical, such as three-phase reactors with both a high gassing duty and solids suspension requirement