Editorial Technical Reference

Agitator Assembly

This page explains how Agitator Assembly is classified within Chemical Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical assembly for mixing, blending, or agitating materials in industrial systems.

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Product Specifications

Technical details and manufacturing context for Agitator Assembly

Definition
The Agitator Assembly is a critical component within industrial systems that facilitates the homogeneous mixing of liquids, slurries, or powders. It typically consists of a motor, drive mechanism, shaft, and impeller(s) mounted within a vessel or tank. Its primary role is to ensure consistent material properties, enhance chemical reactions, prevent sedimentation, and maintain uniform temperature or concentration throughout the process medium. The assembly is designed for use in chemical manufacturing, where process reliability and material compatibility are essential. Available configurations include stainless steel (e.g., 316L) or carbon steel construction, with rated power from 1.5 to 45 kW, shaft speeds from 30 to 300 rpm, impeller diameters from 200 to 1200 mm, and shaft lengths from 500 to 3000 mm. Operating temperature ranges from -20°C to 150°C, and operating pressure from 1.0 to 1.6 MPa. Shaft runout is limited to ≤0.05 mm (ISO 21940), and impeller balance grade is G6.3 (ISO 21940-11). Material grade is 316L (ASTM A240), seal type is double mechanical (API 682), voltage is 380–690 V AC (IEC 60038), ingress protection is IP55–IP65 (IEC 60529), and weight ranges from 50 to 500 kg. These parameters are reference ranges; actual values must be confirmed with the manufacturer for the specific application. The assembly is selected based on process requirements such as viscosity, tank volume, and mixing intensity. Proper installation, alignment, and maintenance are critical to ensure reliable operation and prevent premature failure. Always verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The assembly operates by converting rotational energy from a motor into mechanical motion. The motor drives a shaft, which transmits torque to one or more impellers submerged in the process medium. The impellers' rotation creates fluid dynamics—such as axial flow, radial flow, or shear—that induce turbulence, circulation, and blending of the materials. The design (e.g., impeller type, speed, placement) determines the mixing intensity and flow pattern within the vessel. For example, higher speeds are suitable for low-viscosity fluids, while lower speeds are used for high-viscosity materials. The impeller diameter and shaft length are matched to the tank dimensions to ensure effective mixing throughout the vessel. The mechanical seal prevents leakage of hazardous fluids, and the shaft runout and balance grade are controlled to minimize vibration and wear.
Common Materials
Stainless Steel (e.g., 316L), Carbon Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Power1.5–45 kWSelect based on viscosity and tank volume
Shaft Speed30–300 rpmHigher speed for low viscosity, lower for high
Impeller Diameter200–1200 mmMatch to tank diameter
Shaft Length500–3000 mmDepends on tank depth
Operating Temperature-20–150 °CAbove 150°C requires special seals
Operating Pressure1.0–1.6 MPaBelow 1.0 MPa seat load insufficientISO 5208
Shaft Runout≤0.05 mmExcessive runout causes vibrationISO 21940
Impeller Balance GradeG6.3Higher grade for high speedISO 21940-11
Material Grade316LCorrosion resistant for chemical serviceASTM A240
Seal TypeDouble mechanicalPrevents leakage of hazardous fluidsAPI 682
Voltage380–690 V ACThree-phase, 50/60 HzIEC 60038
Ingress ProtectionIP55–IP65IP65 for washdown areasIEC 60529
Weight50–500 kgIncludes motor and baseplate

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 agitator shaft
    Material: Cast iron or aluminum housing with copper windings
  • Agitator Shaft Part
    Transmits torque from the motor to the impeller(s)
    Material: Stainless steel or carbon steel
  • Impeller
    Creates fluid motion and mixing within the vessel
    Material: Stainless steel, with options for coatings (e.g., PTFE)
  • Shaft Seal Part
    Prevents leakage of process media along the rotating shaft
    Material: Elastomers (e.g., Viton, EPDM) or mechanical seal faces (carbon/silicon carbide)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Agitator Assembly.

Mixer Assembly Stirrer Assembly

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Automated Batch Crystallization System
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Central Mixing Vessel
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Sanitary Mixing Vessel
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Slurry Reservoir/Tank
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Main Hopper
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Mud Mixing Hopper
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Mixing Tank
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Chemical Reactors
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar
flow rate: 0-500 m³/h
temperature: -20°C to 150°C
slurry concentration: Up to 60% solids by weight
Media Compatibility
✓ Water-based slurries ✓ Chemical solutions ✓ Food-grade viscous liquids
Unsuitable: Highly abrasive slurries with sharp particles
Sizing Data Required
  • Tank volume and geometry
  • Required mixing intensity (RPM range)
  • Fluid viscosity and density

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue failure
Cause: Inadequate lubrication, misalignment, or excessive loading leading to spalling, brinelling, or overheating in agitator shaft bearings
Impeller wear/corrosion
Cause: Chemical attack, abrasive slurry particles, or cavitation erosion from improper operating conditions or material incompatibility
Maintenance Indicators
  • Excessive vibration or unusual noise (grinding, knocking) from the agitator housing
  • Visible leakage around shaft seals or discoloration/overheating of bearing housings
Engineering Tips
  • Implement precision alignment during installation/repair and establish a proactive lubrication program with proper grease type/quantity
  • Select impeller/shaft materials compatible with process fluids and optimize operating parameters to avoid cavitation or excessive mechanical stress

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 1940-1:2003 (Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state) ANSI/ASME B73.1-2012 (Specification for Horizontal End Suction Centrifugal Pumps for Chemical Process) DIN 28136:2012 (Agitators - Flanged connections for agitator drives)

Quoted from the published standard.

Manufacturing Precision
  • Shaft runout: ≤0.05mm per meter length
  • Impeller blade thickness: ±1.0mm
Quality Inspection
  • Dye Penetrant Testing (DPT) for surface defects on welds and castings
  • Vibration analysis during operational testing to verify dynamic balance

Manufacturers of Agitator Assembly

Manufacturer profiles associated with Agitator Assembly.

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Frequently Asked Questions

What materials are available for the agitator assembly?

The agitator assembly is available in stainless steel (e.g., 316L) or carbon steel. The material grade is specified as 316L per ASTM A240 for corrosion resistance in chemical service. Confirm the exact material with the manufacturer based on your process media.

What is the operating temperature range?

The operating temperature range is -20°C to 150°C. For temperatures above 150°C, special seals are required. Always verify the temperature limits with the manufacturer for your specific application.

What standards apply to the agitator assembly?

Relevant standards include ISO 21940 for shaft runout and balance, ASTM A240 for material grade, API 682 for seal type, IEC 60038 for voltage, and IEC 60529 for ingress protection. These are reference standards; compliance must be confirmed with the manufacturer.

How do I select the correct agitator assembly?

Selection depends on process parameters such as viscosity, tank volume, and required mixing intensity. Use the reference ranges for power, speed, impeller diameter, and shaft length as a starting point, but consult the manufacturer to ensure proper sizing and compatibility with your system.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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