A BS-4835 clamp fitting , also called a tri-clamp fitting or SMS fitting, is a type of sanitary connection. It is ideal for humid and chemical environments. It ensures a secure and leak-proof seal.
Used primarily in the food, pharmaceutical and biotechnology industries.
Technical specifications:
The BS-4835 Clamp joint is a sealing ring that is placed between two BS 4835 ferrules and compressed using a clamp, ensuring a leak-proof, airtight seal and meeting industrial hygiene requirements. It guarantees a leak-proof, removable, and sanitary connection in process piping systems.
Technical data sheet for the Clamp BS-4835 joint:

| DN | Ød3 | Ød5 | S |
| 1" | 22.8 | 50.5 | 5.5 |
| 1-1/2" | 35.8 | 50.5 | 5.5 |
| 2" | 48.8 | 64 | 5.5 |
| 2-1/2" | 60.5 | 77.5 | 5.5 |
| 3" | 73.1 | 91 | 5.5 |
| 4" | 97.8 | 119 | 5.5 |
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