Agitation Assembly for Chemical Crystallization Units

Product Specifications

Technical details and manufacturing context for Agitation Assembly

Definition

The Agitation Assembly is a component of an industrial chemical crystallization unit. Its primary function is to provide controlled mechanical agitation to the chemical solution (mother liquor) within the crystallizer vessel. This agitation prevents localized concentration gradients, ensures uniform temperature distribution, promotes nucleation and crystal growth, and prevents crystal settling or caking on vessel surfaces. It is essential for achieving consistent crystal size distribution, purity, and yield in chemical manufacturing processes. The assembly typically consists of a motor-driven shaft connected to one or more impellers (e.g., pitched blade, turbine, anchor). The motor provides rotational energy, which is transmitted via the shaft to the impeller(s) submerged in the process fluid. The impeller design creates fluid flow patterns (axial, radial, or tangential) that induce mixing, shear, and circulation throughout the vessel. Speed and torque are controlled to optimize mixing intensity for the specific crystallization kinetics and slurry properties. The assembly is available in materials such as stainless steel (e.g., 316L), Hastelloy, and titanium, selected based on corrosion resistance and process compatibility. Key parameters include rated power (1.5–7.5 kW), shaft speed (30–150 r/min), impeller diameter (200–800 mm), shaft length (500–3000 mm), operating temperature (-20 to 150 °C), operating pressure (0.1–1.6 MPa), shaft runout (≤0.05 mm), material grade (316L), ingress protection (IP54–IP65), and weight (50–500 kg). These values are reference ranges and must be confirmed for the specific model and application. Standards such as IEC 60034, ISO 21940, ASTM A240, and IEC 60529 are referenced for verification. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The assembly uses a motor to rotate a shaft with impellers submerged in the process fluid. Impeller geometry creates axial, radial, or tangential flow patterns, inducing mixing, shear, and circulation. Speed and torque are controlled to achieve the desired mixing intensity for crystallization kinetics and slurry properties. The design prevents concentration gradients and ensures uniform temperature, promoting nucleation and crystal growth while preventing settling.

Common Materials

Stainless Steel (e.g., 316L), Hastelloy, Titanium

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Power	1.5–7.5 kW	Select based on viscosity and tank volumeIEC 60034
Shaft Speed	30–150 r/min	Higher speed for low-viscosity fluids
Impeller Diameter	200–800 mm	Typically 1/3 of tank diameter
Shaft Length	500–3000 mm	Depends on tank depth
Operating Temperature	-20–150 °C	Seal material limits apply
Operating Pressure	0.1–1.6 MPa	Above 1.6 MPa requires special seal design
Shaft Runout	≤0.05 mm	Critical for seal longevityISO 21940
Material Grade	316L	Corrosion-resistant for chemical serviceASTM A240
Ingress Protection	IP54–IP65	IP65 for washdown environmentsIEC 60529
Weight	50–500 kg	Includes motor and agitator

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 the rotational power to turn the agitator shaft.

Material: Cast Iron / Aluminum Housing
Agitator Shaft Part
Transmits torque from the motor to the impeller(s) submerged in the process fluid.

Material: Stainless Steel
Impeller(s) Part
Blades attached to the shaft that create fluid motion and mixing within the vessel.

Material: Stainless Steel
Shaft Seal Part
Prevents leakage of process fluid along the rotating shaft where it penetrates the vessel.

Material: PTFE / Graphite / Ceramic
Support Bearing Part
Supports the agitator shaft, minimizing deflection and vibration.

Material: Stainless Steel / Ceramic
Speed Control
Sets agitator speed, which fixes the shear and circulation the crystallization needs.

Manufacturers of Agitation Assembly

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Frequently Asked Questions

What materials are available for the agitation assembly?

The assembly can be made from stainless steel (e.g., 316L), Hastelloy, or titanium, depending on corrosion resistance and process compatibility. Confirm the exact material grade with the supplier.

What is the typical operating temperature range?

The reference range is -20 to 150 °C, but seal material limits apply. Always verify the maximum and minimum temperatures for your specific application with the manufacturer.

How is shaft runout specified?

Shaft runout is specified as ≤0.05 mm, which is critical for seal longevity. This value should be verified against ISO 21940 and the manufacturer's specifications.

What standards are relevant for this component?

Relevant standards include IEC 60034 for motor power, ISO 21940 for balancing, ASTM A240 for material grade, and IEC 60529 for ingress protection. These are references for verification, not certifications.

Data Basis

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

Preliminary Technical Classification

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pressure:	0 to 10 bar
flow rate:	Up to 500 L/min
temperature:	-20°C to 150°C
slurry concentration:	Up to 40% solids by weight

Agitation Assembly

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards