Editorial Technical Reference

Hopper and Agitator

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

Technical Definition & Core Assembly

A combined component consisting of a hopper for material storage and an agitator for mixing or preventing material settling

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Hopper and Agitator

Definition
The Hopper and Agitator is a critical component within delivery systems that handles bulk material storage and preparation. The hopper serves as a temporary storage vessel for powders, granules, or other materials, while the integrated agitator ensures consistent material flow by preventing bridging, rat-holing, or compaction. This combination is essential for maintaining uniform material properties before transfer to downstream processes. The unit is typically constructed from stainless steel, carbon steel, or food-grade polymers, depending on the application. Key parameters include hopper capacity ranging from 0.5 to 5 m³, agitator speed adjustable between 20 and 120 rpm, and motor power from 1.5 to 15 kW. Operating temperature ranges from -20 to 80 °C, and operating pressure from 0.1 to 0.6 MPa. Material of construction options include SS304 and SS316L (ASTM A240), with surface finishes from Ra 0.8 to 1.6 μm (ISO 4287). Electrical supply is typically 380–480 V AC (IEC 60038), with ingress protection ratings from IP54 to IP65 (IEC 60529). Hopper discharge diameter ranges from 150 to 400 mm, overall dimensions from 1200×1200×1800 to 2000×2000×3000 mm, and weight from 300 to 1500 kg. These values are reference ranges; verify model-specific specifications with the manufacturer.
Working Principle
Material is loaded into the hopper section where it's temporarily stored. The agitator, typically consisting of rotating blades or paddles, operates within the hopper to continuously mix the material. This agitation prevents material segregation, maintains homogeneity, and ensures consistent discharge through the hopper outlet. The system may operate continuously or intermittently based on downstream demand.
Common Materials
Stainless steel, Carbon steel, Food-grade polymers
Technical Parameters
ParameterTypical rangeNotes & selection driver
Hopper Capacity0.5–5 Select based on required batch size and material bulk density.
Agitator Speed20–120 rpmAdjustable to suit material viscosity and settling tendency.
Motor Power1.5–15 kWHigher power for high-viscosity or high-density materials.
Operating Temperature-20–80 °COutside this range, seals and bearings may fail.
Operating Pressure0.1–0.6 MPaFor pneumatic conveying systems; above 0.6 MPa requires reinforced design.
Material of ConstructionSS304, SS316LSS316L for corrosive or food-grade applications.ASTM A240
Surface FinishRa 0.8–1.6 μmLower Ra for hygienic or pharmaceutical use.ISO 4287
Electrical Supply380–480 V ACThree-phase; other voltages available on request.IEC 60038
Ingress ProtectionIP54–IP65IP65 for dusty or washdown environments.IEC 60529
Hopper Discharge Diameter150–400 mmMatch to downstream equipment inlet size.
Overall Dimensions (L×W×H)1200×1200×1800 – 2000×2000×3000 mmCustom sizes available; verify site clearance.
Weight300–1500 kgDepends on capacity and material thickness.

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
  • Hopper body
    Primary container for material storage with sloped walls to facilitate material flow
    Material: Stainless steel
  • Agitator shaft Part
    Central rotating component that supports and drives the mixing blades
    Material: Stainless steel
  • Mixing blades/paddles Part
    Attachments to the shaft that physically move and mix the material
    Material: Stainless steel or food-grade polymer
  • Drive motor
    Provides rotational power to the agitator shaft
    Material: Various metals and electrical components

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hopper and Agitator.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 2 bar
flow rate: 0.5 to 50 m³/hr
temperature: -20°C to 150°C
slurry concentration: Up to 70% solids by weight
Media Compatibility
✓ Food-grade powders ✓ Pharmaceutical granules ✓ Chemical slurries
Unsuitable: Highly corrosive acids or solvents
Sizing Data Required
  • Material bulk density
  • Required throughput capacity
  • Agitator power requirement

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Structural fatigue cracking
Cause: Cyclic loading from material flow and agitator operation leading to stress concentration at welds or transitions
Bearing/seal failure in agitator drive
Cause: Contamination ingress, improper lubrication, or misalignment causing overheating and premature wear
Maintenance Indicators
  • Unusual vibration or audible knocking from agitator assembly during operation
  • Visible material buildup or uneven discharge patterns indicating flow obstruction or agitator imbalance
Engineering Tips
  • Implement regular infrared thermography on agitator bearings and motor to detect early-stage overheating before catastrophic failure
  • Establish predictive maintenance program using vibration analysis and ultrasonic testing to monitor structural integrity and detect developing cracks

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
ANSI/ASME B73.1 - Specification for Horizontal End Suction Centrifugal Pumps for Chemical Process DIN 28015 - Agitators; mounting flanges, dimensions

Quoted from the published standard.

Manufacturing Precision
  • Shaft runout: +/-0.05mm
  • Impeller blade thickness: +/-0.5mm
Quality Inspection
  • Dimensional verification with CMM
  • Non-destructive testing (NDT) for weld integrity

Manufacturers of Hopper and Agitator

Manufacturer profiles associated with Hopper and Agitator.

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Frequently Asked Questions

What materials can be handled by this hopper and agitator?

The hopper and agitator is designed for powders, granules, and similar bulk materials. The construction materials (stainless steel, carbon steel, or food-grade polymers) should be selected based on the material's properties and application requirements.

How do I choose the correct hopper capacity?

Hopper capacity should be selected based on the required batch size and the bulk density of the material. The reference range is 0.5 to 5 m³; confirm the appropriate size with the manufacturer for your specific process.

What is the purpose of the agitator?

The agitator prevents material bridging, rat-holing, and compaction, ensuring consistent flow and homogeneity. It mixes the material to maintain uniform properties before discharge to downstream processes.

What are the operating limits for temperature and pressure?

The reference operating temperature range is -20 to 80 °C, and the operating pressure range is 0.1 to 0.6 MPa. Outside these ranges, seals and bearings may fail; verify with the manufacturer for your application.

Data Basis

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

Preliminary Technical Classification
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