NSF H1 and NSF H2 certifications are international standards that determine the safety of lubricants used in the food industry, but their areas of use and food contact permissions differ. Here's a detailed explanation:
1. NSF H1
- Certification for lubricants with incidental food contact.
- Dosage limit: Safe in small amounts if it comes into contact with food surfaces (typically <10 ppm).
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Areas of use:
- Bearings
- Chains
- Gears
- Sealed machinery
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Features:
- NSF H1 approved greases and oils are safe even if accidentally ingested.
- Widely used in industrial kitchens and food production lines.
2. NSF H2
- Certification for lubricants with no food contact.
- No dosage limit: Does not pose a safety risk for food contact, as its use is in areas where there is no risk of food contact.
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Areas of use:
- Motor, pump, or ventilation systems
- Closed gears
- Moving parts of the food line that do not come into contact
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Features:
- Should not be used in areas where food contact is possible.
- Generally preferred for "auxiliary" parts of machinery.
3. Summary Comparison
| Feature | NSF H1 | NSF H2 |
|---|---|---|
| Food contact | May contact (safe) | Should not contact |
| Area of use | Bearings, chains, gears, sealed machinery | Closed gears, motors, ventilation, parts not in contact with food |
| Dosage limit | Yes (<10 ppm) | No |
| Safety | Food safe | Safe if no food contact |
| Example product | Food-grade grease and oil | Industrial oils, motor oils |
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