Tri-Clamp Union

The Clamp Union—commonly known as a Tri-Clamp—is a high-performance hygienic fitting that joins two ferrules using a clamp and joint ring. Each ferrule features a tapered flange that, when compressed by the clamp, forms a secure and sanitary seal.

Originally popular across continental Europe, Tri-Clamps are now widely adopted throughout the UK for applications requiring frequent access and inspection.

Key Features

Tool-free removal: Clamp releases easily via wing nut—no spanners required
Ideal for frequent line checks: Quick disassembly supports routine inspection and cleaning

Specifications

Size range: Stocked from ½″ OD to 10″ OD
Ferrule lengths: Available in 21.5mm and 28mm
Manufacturing standard: BS4825 Part 3
Internal surface finish: 0.8Ra to 1.6Ra for hygienic performance
Standard clamp: “BSF” type (single hinged)
Clamp types: Single or double hinged options, along with high pressure double bolted (13MHP)

Joint Ring Options