Agitation Mechanism for Yogurt Fermentation Tanks

Product Specifications

Technical details and manufacturing context for Agitation Mechanism

Definition

The agitation mechanism is a critical component of industrial-scale yogurt fermentation tanks, responsible for ensuring uniform distribution of starter cultures, maintaining consistent temperature and texture throughout the fermentation process, and preventing sedimentation or separation of milk solids. It operates continuously or intermittently during fermentation to achieve optimal product quality. This component is typically integrated into the tank's top or side, with a motor-driven shaft that extends into the vessel. The shaft is fitted with impellers or paddles that rotate to create fluid movement, mixing the contents thoroughly. The speed and direction of rotation are controlled to meet specific viscosity and homogeneity requirements for yogurt production. The mechanism is designed for food-grade applications, with wetted parts made of stainless steel 316L to resist corrosion and comply with hygiene standards. It is available for tank capacities ranging from 1,000 to 30,000 liters, with agitator speeds from 10 to 120 rpm, and motor power from 1.5 to 15 kW. The mixing accuracy is ±0.5%, ensuring uniform culture distribution. Operating temperature ranges from 4 to 45°C, and operating pressure from 1.0 to 1.6 MPa. The ingress protection rating is IP54 to IP65 (per IEC 60529), suitable for washdown environments. Shaft and impeller materials are typically 304 or 316L stainless steel (per ASTM A276). The weight varies from 150 to 2,000 kg, and the power supply is three-phase, 380–480 V AC (per IEC 60038). These parameters are reference ranges; actual values must be confirmed with the manufacturer for specific models and applications. The agitation mechanism is essential for achieving consistent yogurt quality, and proper selection and maintenance are crucial for reliable operation.

Working Principle

The agitation mechanism consists of a motor-driven shaft with attached impellers or paddles that rotate within the fermentation tank. The rotation creates fluid movement that mixes the contents, ensuring uniform distribution of starter cultures and preventing sedimentation. The speed and direction of rotation are controlled to achieve the desired viscosity and homogeneity for yogurt production. The mechanism operates continuously or intermittently during fermentation, with the motor power and agitator speed selected based on tank size and product viscosity. The design ensures gentle handling of the product while maintaining effective mixing.

Common Materials

Stainless Steel 316L

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tank Capacity	1000–30000 L	Select based on production batch size
Agitator Speed	10–120 rpm	Higher speed for faster mixing, lower for gentle handling
Motor Power	1.5–15 kW	Depends on tank size and viscosity
Mixing Accuracy	±0.5 %	Ensures uniform culture distribution
Operating Temperature	4–45 °C	Typical fermentation range
Ingress Protection	IP54–IP65	Higher rating for washdown environmentsIEC 60529
Shaft Material	304/316L	316L for corrosive mediaASTM A276
Impeller Material	316L	Food-grade stainless steelASTM A276
Weight	150–2000 kg	Varies with size and material
Power Supply	380–480 V AC	Three-phase, 50/60 HzIEC 60038

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Drive Motor
Provides rotational power to the agitation system

Material: Stainless Steel Housing
Agitation Shaft Part
Transmits rotational force from motor to impellers

Material: Stainless Steel 316L
Impeller/Paddle Part
Creates fluid movement and mixing action within the tank

Material: Stainless Steel 316L
Seal Assembly Part
Prevents contamination and maintains sanitary conditions at shaft entry point

Material: Food-grade elastomers and stainless steel

Manufacturers of Agitation Mechanism

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Frequently Asked Questions

What is the typical tank capacity range for this agitation mechanism?

The agitation mechanism is designed for tank capacities from 1,000 to 30,000 liters. The exact capacity must be matched to the production batch size, and the manufacturer should confirm suitability for your specific tank.

What materials are used for the wetted parts?

The wetted parts, including the shaft and impeller, are typically made of stainless steel 316L, which is food-grade and corrosion-resistant. Some models may use 304 stainless steel for the shaft, but 316L is preferred for corrosive media. Always verify the material grade with the supplier.

What is the operating temperature range?

The operating temperature range is 4 to 45°C, which covers typical yogurt fermentation temperatures. Ensure the mechanism is suitable for your process temperature, and confirm with the manufacturer for extreme conditions.

What standards are referenced for this product?

The product references, IEC 60529 for ingress protection, ASTM A276 for material grades, and IEC 60038 for power supply. These standards are for verification purposes; they do not imply certification. Always check compliance with the manufacturer.

Data Basis

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Preliminary Technical Classification

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pressure:	Atmospheric to 1.5 bar (tank head pressure)
flow rate:	0.5 to 5 m/s (impeller tip speed)
temperature:	4°C to 45°C (typical yogurt fermentation range)
slurry concentration:	Up to 40% solids (milk solids content)

Agitation Mechanism

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