Why Swivel Side Entry Agitators Are More Efficient for Large Storage Tanks

Common Mixing Problems in Large Storage Tanks

Struggling with sedimentation or dead zones in your storage tanks? In many industrial processes, especially in oil & gas, chemical processing, and slurry handling, poor tank mixing can lead to serious operational problems.

Typical issues include uneven concentration, sludge accumulation at the bottom, and insufficient circulation across the tank. These problems not only affect product quality but also increase maintenance costs and downtime.

What Is a Swivel Side Entry Agitator?

A swivel side entry agitator is a type of industrial tank mixing equipment installed on the side of a storage tank. Unlike conventional fixed agitators, it features a manual adjustable angle of ±30°.

This design allows operators to change the flow direction based on actual process conditions. Even a small adjustment in angle can significantly improve circulation patterns and mixing coverage.

Why Swivel Side Entry Agitators Are More Efficient

1. Wider Flow Coverage

Fixed side entry agitators generate flow in a single direction, which limits their ability to cover the entire tank. In contrast, swivel agitators allow directional adjustment, enabling the flow to reach more areas.

This is especially important in large tanks where flow distribution is critical.

2. Reduced Sedimentation

Sedimentation is one of the most common challenges in tank mixing. By adjusting the mixing angle periodically, the agitator can re-suspend settled solids and prevent sludge build-up.

This makes swivel agitators highly effective in crude oil storage and slurry applications.

3. Flexible Operation

Different stages of a process may require different mixing patterns. With a manual swivel mechanism, operators can easily adjust the angle to optimize performance without changing equipment.

4. Simple and Reliable Design

Compared to automatic oscillating systems, manual swivel agitators have a simpler structure. This means fewer components, lower maintenance requirements, and higher reliability in harsh industrial environments.

5. Cost-Effective Solution

Swivel side entry agitators provide improved mixing efficiency without the added cost of complex automation systems. They offer a practical balance between performance and investment.

Fixed vs Swivel Side Entry Agitator

The difference becomes especially clear in large tank applications:

Typical Applications

• Oil & Gas (crude oil storage tanks)
• Chemical storage tanks
• Slurry mixing systems
• Water treatment tanks

How to Choose the Right Side Entry Agitator

Selecting the right agitator depends on several key factors:

• Tank size and geometry
• Liquid viscosity and density
• Solid content
• Mixing objectives (suspension, blending, heat transfer)

A proper selection ensures optimal performance and long-term operational stability.

Frequently Asked Questions

When should I use a side entry agitator?

Side entry agitators are ideal for large storage tanks where top installation is not practical or where strong horizontal circulation is required.

Is manual adjustment sufficient?

Yes. In most industrial applications, a ±30° adjustable angle is enough to significantly improve mixing coverage and reduce dead zones.

Can it handle high solid content?

Yes. Swivel side entry agitators are particularly effective in slurry or sediment-prone applications.

Does it require more maintenance?

No. Its simple structure ensures lower maintenance and higher reliability.

Get a Customized Mixing Solution

If you are facing mixing challenges such as sedimentation or uneven flow, we can help.

Tell us your tank size, medium, and working conditions — we will recommend the most suitable solution for your application.