Side Entry Gear Drive Mixers: The Workhorse of Large Tank Mixing
- Jeffey Naidel
- Apr 9
- 2 min read
Overview
Side entry gear drive mixers are engineered for efficient blending and homogenization in large storage tanks where top entry solutions become impractical or cost-prohibitive. Widely used in crude oil storage, terminals, and bulk chemical tanks, these mixers deliver high flow with lower installed power by inducing horizontal circulation patterns across the tank floor.

At MIXCO-LOTUS MIXERS, side entry units are designed for reliability, ease of maintenance, and optimized hydraulic performance—critical for continuous-duty industrial applications.
How Side Entry Mixers Work
Unlike top entry mixers that drive vertical flow, side entry mixers are mounted horizontally through the tank wall. A gear-driven motor transmits torque to a shaft and impeller, generating strong axial flow across the tank diameter.
Key hydrodynamic effects:
Bulk circulation: Sweeps settled solids from the tank bottom
Stratification control: Eliminates layering in stored fluids
Thermal uniformity: Maintains consistent temperature profiles
Key Design Features of MIXCO-LOTUS MIXERS Side Entry Gear Drive Mixers
1. Heavy-Duty Gear Drive SystemRobust helical or bevel gear drives provide high torque at optimal RPM ranges, ensuring long service life under continuous operation.
2. Engineered Seal SystemsSingle or double mechanical cartridge seals are designed for hydrocarbon and chemical service, minimizing leakage and maintenance.
3. Optimized Impeller TechnologyHydraulically efficient impellers (axial flow or modified hydrofoils) maximize flow per horsepower while minimizing shear.
4. Rugged Shaft and Bearing DesignDesigned to operate below 65% of first critical speed, ensuring mechanical stability and long-term reliability.
5. Easy Installation & MaintenanceSide entry mixers can be installed without opening the tank roof—reducing downtime and improving safety.
Typical Applications
Side entry gear drive mixers are widely deployed across multiple industries:
Crude oil storage tanks (BS&W control)
Refined fuels and petrochemical storage
Asphalt and heavy hydrocarbons
Bulk chemical blending tanks
Wastewater equalization basins
Engineering Considerations
Proper selection and placement are critical to performance:
Tank diameter and fluid properties (viscosity, density)
Number of mixers required (often multiple units per tank)
Impeller type and diameter
Mounting angle and elevation
Power per unit volume (HP/1000 gal or kW/m³)

At MIXCO-LOTUS MIXERS, each application is analyzed to ensure optimal circulation patterns and mixing efficiency—not just equipment supply.
Reliability Matters
Industrial tank mixing is not just about moving fluid—it’s about uptime, consistency, and long-term cost control.
MIXCO-LOTUS MIXERS side entry gear-driven units are built with:
Proven industrial gearboxes
Precision-machined shafts
Heavy-duty seal housings
Field-tested impeller designs
This results in:
Reduced downtime
Lower maintenance costs
Extended equipment life
Why Choose MIXCO-LOTUS MIXERS
When selecting a side entry mixer, engineering expertise matters as much as the hardware. MIXCO-LOTUS MIXERS combines decades of process knowledge with proven mechanical design to deliver solutions that outperform and outlast.
Application-driven impeller selection
Heavy-duty mechanical design standards
Competitive pricing vs. SPX (Lightnin/Philadelphia) and NOV Chemineer
Fast delivery with in-stock options
Strong aftermarket support
Get Expert Help on Your Tank Mixing Application
Whether you are designing a new crude oil storage facility or optimizing an existing tank, the right side entry mixer can significantly improve performance and reduce operating costs.
Contact MIXCO-LOTUS MIXERS today:
Phone: (941) 966-1885
Email: info@lotusmixers.com
Web: www.lotusmixers.com
MIXCO-LOTUS MIXERS — The Mixer Company People You Can Trust for Proven Process Mixing Solutions.



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