Tri Clover Fittings

Tri Clover Fittings

Tri Clover Fittings (the original brand name) are also commonly referred to as Tri Clamp Fittings or Clover Clamps. These are a sub-set of the Sanitary Fittings group of products. Clover Clamps are polished fittings designed for use in conditions where a smooth finish mitigates against contamination. A Tri Clover connection provides a secure connection, is leak proof and easy to clean. A further benefit of Tri Clover Fittings is they can be cleaned in place. The connection set up is also quick to assemble and take down. For these reasons Tri Clamps are used extensively in the Food and Pharmaceutical Industries. The Tri Clover range of fitting includes Tri Clover Ball Valves, also manufactured in high grade Stainless Steel 304. Tri-Clover Fittings are also available in Stainless Steel 316.

    1. Tri-Clamp Fittings

      There are 3 fittings that make up a Tri Clover connection - two tri clover fittings, the clover clamp itself and a gasket. These are supplied here in different sizes in SS304. Polished to a smooth finish for food grade requirements.

    1. Tri-Clover Valves

      The Tri Clover Valves are manufactured from high grade Stainless Steel to a polished finish. These are popularly used in Wineries, Dairies and the Brewing industry. Easy to install and keep clean.


To start with, it is important to note that the Tri Clamp connection set-up comprises 4 fittings; 2 flange-end fittings held in place by a tri clover clamp with a gasket for sealing.

      Tri Clamp or Tri Clover sizing is determined by measuring the outside diameter (OD) of the tube and not the outside diameter (OD) of the flange-end itself. The diameter of the flange-end tends to be about ½” (15mm) wider than the OD of the tube. For example, the 2” OD of a Tri-Clover tube has a flange-end size closer to 2.5”.
      Then also note the following relating to the sizing of Clover Clamps:
      • The 1/2” and 3/4” Tri Clamp fittings have the same flange-end size of almost 1"(0.984"). In Tri Clamp sizing both are 3/4" Tri Clamps.
      • The 1” and 1 1/2” Tri Clamps have the same flange-end size of almost 2"(1.984"). In Tri Clamp sizing both are 1 1/2" Tri Clamps.

For the most part the only measurement required is the outside diameter of the tube as this will be the same size of the Tri-Clamp that you require. For further clarification, please see the Tri Clamp Sizing table below:


Tube Size (OD) TC Flange End (OD) Tri-Clamp size Sanitary Size ID of Tube
1/2” 0.984” 3/4" Clamp 1/2” 0.370
3/4” 0.984” 3/4" Clamp 3/4” 0.620”
1” 1.984” 1 1/2" Clamp 1” 0.870”
1 1/2” 1.984” 1 1/2" Clamp 1 1/2" 1.370”
2” 2.516” 2" Clamp 2” 1.870”
2 1/2” 3.047” 2 1/2" Clamp 2 1/2" 2.370“
3” 3.579” 3" Clamp 3" 2.870”
4” 4.682” 4" Clamp 4" 3.834”
6” 6.570” 6” Clamp 6” 5.782”


Although a 1/2” and 3/4” Tri Clamps will connect with each other as will the 1” and 1 1/2”, it is important to note that the internal diameters will differ (see Table above). It is incumbent upon the user to determine whether the mixing and matching of sizes will be suitable for their application.

The most popular Clover Clamp sizes used by breweries and in home brewing are the 1” and 1 1/2” sizes. Both have the same flange-end sizes as indicated above and can interconnect with each other. As an example, a 1 1/2” Tri Clamp Ball Valve will connect with a 1” Ferrule.


  • Easy to use
  • Flexible system
  • Easy maintenance
  • The combined lip flange and gasket do not impede liquid flow.
  • Superior corrosion resistance, low cost and long service life.
  • Accessible for inspection and maintenance without the use of tools.