Design and Working Principle

The Besan Grinding System follows a staged, controlled size-reduction process to achieve 100–500 microns (Gargara, Fine & Super-Fine) with hygienic operation and minimal product loss.

Stage 1: Feed Hopper + Feed RAL (Rotary Air Lock)

• Chana Dal / pre-crushed material is loaded into the Feed Hopper.
• A Feed Rotary Air Lock ensures controlled, uniform material dosing into the system.
• It also maintains air sealing, preventing false air entry into the mill and ensuring stable airflow.

Stage 2: ACM Mill (Grinding + Classification)

The ACM Mill is the heart of the Besan system and carries out both fine grinding and particle classification in a single pass.

Grinding Action

• Material enters the grinding chamber where a high-speed rotor impacts and pulverizes the product.
• The high velocity of air through the chamber maintains cool grinding (<10°C rise), preserving besan colour and aroma.

Integrated Classification

• A dynamic classifier wheel rotates at controlled speed to determine the cut-point.
• Fine particles pass through the classifier.
• Coarse particles are rejected and re-circulated for further grinding, giving uniform mesh output.

Output Mesh Range

• Suitable for Gargara, Fine, and Super-Fine Besan (100–500 Microns).

Stage 3: Interconnecting Ducting

• Carries the air-material mixture from ACM to Bag Filter.
• Designed for smooth airflow, minimum pressure drop, and hygienic transfer.
• Fabricated in SS/MS as required for food safety.

Stage 4: Bag Filter (Dust Collection + Fine Product Recovery)

• The air-material stream enters the Pulse Jet Bag Filter where the fine besan powder is separated.
• Filter bags ensure >99% collection efficiency with negligible dust emission.
• Pulse Jet cleaning maintains stable differential pressure and consistent airflow.

Stage 5: Discharge RAL

• The collected besan is discharged through a Rotary Air Lock into the product bin/packing system.
• Prevents air leakage from the Bag Filter and maintains proper suction in the system.

Stage 6: Centrifugal Fan (C-Fan)

• The C-Fan provides the required airflow through the mill, ducts, and bag filter.
• Ensures:
• Efficient transportation of fines
• Stable classification performance

Stage 7: Control Panel (MCC/PLC Based)

• Houses starters, drives, automation logic, and safety interlocks.
• Functions include:
• Feed RAL speed control
• Classifier RPM control (VFD driven).
• Fan airflow control.
• Bag filter pulse sequencing.
• Temperature and motor load monitoring.
• Safety interlocks for airflow, doors, and overload.
• Optional HMI/PLC enables recipe-based operation and real-time monitoring.

Model Description

Variant	Mill Model	Total Power in HP	Capacity
BS-15-MS	ACM 15 MS	25	100-150 kg/hr
BS-15-SS	ACM 15 SS 304CP	25	100-150 kg/hr
BS-30-MS	ACM 30 MS	59	300-500 kg/hr
BS-30-SS	ACM 30 SS 304CP	59	300-500 kg/hr
BS-60-MS	ACM 60 MS	127	660-1000 kg/hr
BS-60-SS	ACM 60 SS 304CP	127	660-1000 kg/hr

Key Components

Component	Function	Key Technical Features
Feed Hopper + Feed RAL (Rotary Air Lock)	Hold material and ensures controlled, uniform feeding into the mill	Maintains air sealing, prevents false air entry, supports consistent feed rate
ACM Mill (Air Classifying Mill)	Performs fine grinding and internal air-classification in a single pass	Cool grinding (<10°C rise), screen-less design, adjustable classifier RPM for mesh control
Bag Filter (Pulse Jet Type)	Separates fine besan powder from conveying air and ensures dust-free operation	>99% collection efficiency, food-grade filter bags, automatic pulse cleaning
Discharge Hopper + RAL	Collects finished besan and discharges it to packing or downstream equipment	Provides airlock, ensures dust-free discharge and maintains suction in system
Centrifugal Fan (C-Fan)	Generates required airflow through ACM, ducting, and bag filter	Ensures cooling during grinding, stable classification
Control Panel (MCC/PLC Based)	Controls and synchronizes all equipment for smooth and safe operation	Classifier speed control, feed control, bag filter pulse logic, safety interlocks, overload protection

System Characteristics

Capacity Range	100 - 5000 Kg/hr
Output Finess	100 - 500 Microns
Besan Grade	Gargara, Fine & super fine

Features & Benefits

Process Benefits

• Uniform particle size with exact mesh control
• Low heat generation → preserves aroma, color & nutritional value
• Screen-less operation → no choking or frequent stoppages
• Higher yield & low wastage

Hygiene & Safety Benefits

• SS304/316 contact parts available
• Dust-free environment with >99% collection efficiency

Operational Benefits

• Fast changeover between grades (Gargara / Fine / Super Fine)
• Lower power consumption vs. traditional pulverizer
• Stable performance with automated controls

Applications

• Besan(Gram Flour)
• Sattu
• Ladu Besan
• Premium Fine Besan for FMCG