The document describes different environments and construction requirements for conveyor systems. It outlines four levels of environments - dry, wipe-down, wash-down, and three levels of sanitary environments. The higher the environment level, the higher the moisture, use of cleaning chemicals, and bacteria risks. Accordingly, construction requirements become more stringent with materials changing from mild steel to stainless steel and seals and joints requiring continuous welds to prevent moisture and chemical intrusion. Electrical enclosures and components also become more corrosion resistant at higher environment levels.

1. Conveyor Construction
Levels* Sanitary
Wipe-Down * Wash-Down

2. Dry Environment Construction
Dry Environment
• Minimal or no-moisture
• No corrosive cleaning chemicals
• Low humidity

3. Dry Environment
Environment:
Minimal/No Moisture
Cleaning:
Dry Wipe Down or
Air Blow-off
Construction:
Mild Steel, Coated
Bolted, Stitch Welds
Open Top Frame
Electrical: Components:
Nema 12 Mild Steel UHMW Guide Rail
Formed Angle, Pedestal Support
Enclosures
Painted Housing, Steel Insert Bearings, Standard Lube
Painted Motors
Painted Reducers, Standard Lube

4. Wipe-Down Environment Construction
Wipe-Down Environment
• Minimal or no-moisture
• Low humidity
• No corrosive cleaning chemicals

5. Wipe-Down Environment
Environment:
Low Moisture/No use of
Corrosive Chemicals
Cleaning:
Manual Wipe Down,
Mild Detergents,
No High Spray Hoses
Construction:
Stainless Steel, Polished
Bolted, Stitch Welds Open
Top Frame
Components:
UHMW Guide Rail
Electrical: Formed Angle, Pedestal, Square Tube Support
Nema 4 Stainless Steel Painted Housing, Steel Insert Bearings, Standard Lube
Enclosures Painted Motors
Painted Reducers, Standard Lube

6. Wash-Down Environment Construction
Wash-Down Environment
• Moderate to heavy moisture
• Limited corrosive cleaning chemicals
• Base wash-down level
• Low pressure wash

7. Base Wash-Down Environment
Environment:
Moderate to High Moisture,
Moderate use of Corrosive
Chemicals
Cleaning:
Low Pressure Hose Wash
Construction:
Stainless Steel, Polished
Bolted, Stitch Welds
Open or Closed Top Frame
Components:
UHMW Guide Rail
Electrical: Formed Angle, Sanitary Channel, Square Tube Support
Nema 4X Stainless Steel Polymer Housing, Plated Insert Bearings, Food Grade
Enclosures Lube
White Epoxy Motors
Corrosion Resistant Reducers, Food Grade Lube

8. Sanitary Level I Environment Construction
Sanitary Level I Environment
• Moderate to heavy moisture
• Corrosive cleaning chemicals
• High pressure wash

9. Sanitary Level I Environment
Environment:
High Moisture, High use of
Corrosive Chemicals
Cleaning:
High Pressure Hose Wash
Construction:
Stainless Steel, Polished
Bolted, Continuous Non-Pitted
Welds
Open or Closed Top Frame
Components:
Electrical:
UHMW Flat Bar or Stainless Steel Guide Rail
Nema 4X Stainless Steel Sanitary Channel, Square Tube Support
Enclosures
Polymer Housing, Stainless Steel insert Bearings,
Food Grade Lube
Stand-offs: White Epoxy Motors
Bolted Stand-offs Corrosion Resistant Reducers, Food Grade Lube

10. Sanitary Level II Environment Construction
Caustic Wash-Down Environment
• High moisture
• High humidity
• Aggressive cleaning chemicals and processes
• Contain Bacteria Risk

11. Sanitary Level II Environment
Environment:
High Moisture, High use of
Corrosive Chemicals to minimize
Risk of Bacterial Growth
Cleaning:
High Pressure Hose Wash,
CIP and COP procedures
Construction:
Stainless Steel, Bead Blast
Welded with Continuous Non-
Pitted Welds
Open Top Frame
Components:
Electrical: UHMW Flat Bar or Stainless Steel Guide Rail
Nema 4X Stainless Steel Sanitary Channel, Square Tube Support
Enclosures Polymer Housing, Stainless Steel insert Bearings,
Food Grade Lube
Stand-offs: Stainless Steel Motors
Welded Stand-offs Stainless Steel Reducers, Food Grade Lube

12. Sanitary Level III Environment Construction
Caustic Wash-Down Environment
• High moisture
• High humidity
• Constant corrosive cleaning chemicals
• Contain Bacteria Risk

13. Sanitary Level III Environment
Environment:
High Moisture, High use of
Corrosive Chemicals to
minimize Risk of Bacterial
Growth
Cleaning:
High Pressure Hose Wash,
CIP and COP procedures
Construction:
Stainless Steel, Bead Blast
Welded with Continuous Non Components:
Pitted Welds UHMW Flat Bar or Stainless Steel Guide Rail
Tube Frame Square Tube Support
Polymer Housing, Stainless Steel insert
Electrical: Bearings, Food Grade Lube
Stainless Steel Motors
Nema 4X Stainless Steel Stainless Steel Reducers, Food Grade Lube
Enclosures

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