The selection of food-grade grease in food production facilities is a critical decision for both the longevity of the equipment and the assurance of food safety. Here's a detailed guide:
1. Selection Criteria
A. Food Grade Approval
- Must have NSF H1, FDA 21 CFR 178.3570, or EU food contact approval.
- Food-grade certified grease must be used on all equipment with a risk of food contact.
B. Operating Temperature
- Normal temperature greases: Used for applications between room temperature and 120°C.
- High-temperature greases: Suitable for ovens, cooking, and filling lines between 120–250°C.
C. Material Compatibility
- Metals: Must be compatible with stainless steel, aluminum, and bronze.
- Seals and plastic parts: Should not react with materials such as silicone, nitrile, PTFE.
D. Load and Pressure Resistance
- For bearings operating under heavy load and high speed, high-pressure resistant grease should be selected.
- A lighter consistency grease is sufficient for equipment with light loads and low speeds.
E. Chemical Resistance
- Must be resistant to water, steam, and cleaning chemicals.
- Must be suitable for use in CIP (Clean-In-Place) systems.
F. Viscosity and Consistency
- The correct consistency should be chosen according to the equipment type:
- Chains and gears → more fluid, adhesive grease
- Bearings and bushings → medium consistency multi-purpose grease
- Sealed machines → soft consistency grease
2. Example Greases by Application Area
| Equipment | Grease Type | Special Feature |
|---|---|---|
| Bearings | Food-grade multi-purpose grease | General bearing protection |
| Oven/cooking lines | High-temperature food-grade grease | 200–250°C resistance |
| Chains and gears | Food-grade chain grease | Adhesive, water-resistant |
| Sealed machines | Soft food-grade grease | Seal compatible, low hardness |
| Filling machines | Food-grade piston/valve grease | NSF H1 approved, food contact safe |
3. Risks of Incorrect Grease Use
- Non-food grade grease → food contamination
- Grease not resistant to high temperatures → melting, leaking, equipment damage
- Material incompatibility → deterioration of seals or plastic parts
- Incorrect viscosity → bearing or chain wear
4. Storage and Shelf Life
- Store in a cool, dry, and dark environment.
- Unopened packaging has a shelf life of 2–5 years (varies by product).
- Consume within a short period after opening.
You can contact us for technical support regarding solutions suitable for your business.
