Even when the system is operated with high vibrations, the screw connection guarantees sufficient safety at high pressures or vacuum.

This is achieved through 4 effective design details:

• The back ferrule affords damping of tube circuit vibrations through a spring like action. Furthermore, it prevents a carry-over of tightening torque from the coupling nut to front ferrule.
• The front ferrule circumferentially seals the surface between the tube and coupling. Due to the inner taper the front ferrule is pressed into the tube so that a pressure-tight impression is formed.
• Silvering of the coupling nut thread prevents seizing of the stainless steel coupling. This allows multi-use of a coupling.
• A deep pipe bore, and entry taper, guarantees accurate positioning and centring of the tube.

On request, parts can also be supplied from Hastelloy, Titanium and other highly alloyd materials. Material certification according DIN ISO 10204, ANSI etc., available on reques. Special tests and approvals possible, if required.

Schwer Fittings Standard cleaning

As standard, the u2-Lok twin-ferrule fittings are supplied free of oil and grease (off) and individually packed in foil. A special multi-stage cleaning process with ultrasonic support removes oil and grease residues as well as loose particles, ensuring that the components meet the basic requirements of the industry.

When using oxygen, certain precautions must be taken to rule out the risk of fire. The cleanliness of the system plays an important role in preventing an oxygen fire. For such applications, we offer fittings in accordance with the "offO2" Schwer Fittings standard. This in-house standard defines the cleaning, assembly and packaging of stainless steel fittings in accordance with ASTM G93 Level C for all components in contact with media.

 Please refer to our more detailed information on the various cleaning standards in the data sheets listed below.

Cleaning Standard off
Cleaning Standard offO2