What Are Single Wall Mixing Tanks
Single Wall Mixing Tanks are sanitary stainless steel vessels built with just one shell layer, without the additional jacket used for heating or cooling. They are designed for processes that only require blending, dissolving, or holding a product at ambient temperature, making them a straightforward and cost-effective choice compared to jacketed alternatives. Despite the simpler construction, single wall tanks still meet the same hygienic standards as other sanitary equipment, with polished interior surfaces, crevice-free welds, and easy-to-clean geometry.
These tanks are widely used across food, beverage, cosmetics, and chemical facilities wherever temperature control is not part of the mixing step—such as blending pre-heated liquids, dissolving powders in room-temperature water, or holding a finished product before packaging.
Advantages of Choosing a Single Wall Design
- Lower upfront cost, since eliminating the jacket layer reduces material usage and fabrication time.
- Lighter overall weight, which simplifies installation, floor loading requirements, and transport logistics.
- Simpler maintenance, as there is no jacket cavity, heat transfer medium, or associated piping to inspect and service.
- Faster fabrication lead time, making single wall tanks a practical option for tight project schedules or budget-conscious expansions.
- Flexible mounting options, including portable caster-mounted units for smaller batch sizes that need to move between work areas.
Tank Body and Agitator
The tank body is fabricated from a single layer of SUS304 or SUS316L stainless steel plate, formed into a cylindrical shape with a flat, dish, or conical bottom depending on drainage needs. A top-mounted or side-mounted agitator—fitted with paddle, propeller, or anchor blades—drives the mixing action, with motor power and blade design selected based on product viscosity and batch size.
Inlet, Outlet, and Access Points
Ingredients are typically loaded through a top manway or inlet port, while a bottom or side outlet valve allows the finished product to be discharged by gravity or pump transfer. Sight glasses and level indicators help operators monitor batch volume and mixing progress without opening the tank.
Cleaning and Sanitation
Because the interior surface has no jacket-related welds or fittings, single wall tanks are often easier and faster to clean than jacketed units. A spray ball connected to a CIP system, or manual washdown for smaller tanks, is generally sufficient to maintain hygienic conditions between batches.
Single Wall vs. Jacketed Tanks: Choosing the Right Fit
Comparison between single wall and jacketed mixing tanks for common process needs
| Factor |
Single Wall Tank |
Jacketed Tank |
| Temperature control |
Not available |
Built-in heating/cooling |
| Initial cost |
Lower |
Higher |
| Tank weight |
Lighter |
Heavier |
| Best use case |
Ambient blending, holding |
Heat-sensitive or temperature-critical processes |
In practice, many facilities operate a mix of both types—using single wall tanks for straightforward blending or holding steps, and reserving jacketed tanks for stages where precise temperature control is essential, such as cooking or dissolving heat-sensitive ingredients.
Selecting the Right Capacity and Fittings
Single wall mixing tanks are available across a wide capacity range, from small 50–200 liter lab and pilot units to large production vessels exceeding 10,000 liters. Choosing the correct agitator speed, blade type, and port configuration—such as sanitary tri-clamp fittings—ensures the tank integrates smoothly with existing pumps, piping, and CIP systems already installed on the line.
YME Equipment Co., Ltd, a China-based OEM/ODM fluid process equipment manufacturer and brewery equipment supplier with over 20 years of experience, produces single wall mixing tanks alongside its broader range of stainless steel processing equipment, including brewhouse, fermentation, and CIP systems. Its equipment has been exported to customers across Europe, North America, Australia, and Asia, built on long-term partnerships and a consistent focus on quality.
Frequently Asked Questions
Q1: Can a single wall mixing tank be upgraded with a jacket later?
Retrofitting a jacket onto an existing single wall tank is possible in some cases, but it typically requires significant rework of the tank shell, so it is usually more practical to specify jacketed construction upfront if temperature control may be needed in the future.
Q2: Are single wall tanks suitable for food-grade applications?
Yes, when built from SUS304 or SUS316L stainless steel with a polished sanitary finish, single wall tanks fully meet food-grade hygiene requirements for blending and holding applications.
Q3: What agitator types work best in a single wall tank?
Paddle and propeller agitators suit low to medium viscosity liquids, while anchor agitators are better suited for thicker products that need continuous wall-scraping to prevent settling.
Q4: How do single wall tanks fit into an existing production line?
They are commonly installed as intermediate holding or blending vessels between upstream heating and downstream filling or packaging stages, connected through standard sanitary tri-clamp piping.