Sanitary Stainless Steel Unions / Couplings

Dairy Stainless Steel Unions / Couplings

Sanitary Food Grade Clamp Union

Tri Clamp Union

The tri Clamp Union is comprised of a Clamp Ring, two ferrules, and a tri clamp seal.

The Ferrule Coupling has a + shaped Gasket.

SMS Union

Sanitary Food Grade SMS Union

The SMS Union is comprised of a SMS round slotted nut, SMS male part, SMS liner, and SMS gasket.

The SMS coupling has a L shaed gasket.

DIN Union

DIN Union

The DIN Union is comprised of a DIN round slotted nut, DIN male part, DIN liner, and DIN gasket.

The DIN coupling has a D shaped gasket.

RJT Union

RJT Union

The RJT Union is comprised of a RJT round slotted nut, RJT male part, RJT liner, and RJT gasket.

The RJT coupling has an O-ring gasket.

IDF Union

IDF Union

The IDF Union is comprised of a IDF round slotted nut, IDF male part, IDF liner, and IDF gasket.

The easiest way to identify an IDF Union is its T shaped gasket.

KF Clamp (KF Coupling)

KF Clamp Union

The KF Union is comprised of a KF Clamp, two KF Flanges, and a KF Centering Ring with Seal.

The KF Coupling has an O-ring seal that is supported by a centering ring.

Hygienic Unions / Couplings come in different standards

The different unions above represent different Sanitary Standards . SMS (Swedish Milk Standards), DIN (German Standards), RJT (Ring Joint Type), IDF (International Dairy Federation, 3A (American FDA Standards).

The most important differences between these standards are 

  • Welding Outer Diameter, Inner Diameter, and Thickness, you need to use Unions from the same standards as your pipe line to make sure you can weld them together

  • Design and thread size- Different designs means Unions from different standards are incompatible with each other, you cant lock an SMS Union with a Nut from a DIN Union.

  • Tri Clamp Unions can be tightened and loosen without any special tools, while the rest require compatible spanners. 

Unsure about which Standards are suitable for your pipe line? Call us, we will show you how to determine your current pipe line standards.

NKE is a Sanitary Union supplier in Malaysia.