GC Unions

Union types

1. Straight through unions

2. Bulkhead unions

Material characteristics

• Available in stainless steel or glass lined (GLT) stainless steel.

Connections suitable

• Connecting tubing of the same diameter.
• Glass Lined Tubing (GLT) and plastic tubing.

Features, benefits and applications

• Low dead volume.
• Non-swaging, easy to remove fittings that will not deform tubing.
• High temperature operations - ferrules are the temperature limiting component.

Sizes available

• 1/16" to 1/4".

Union types

3. Reducing unions

4. Reducing bulkhead unions

Material characteristics

• Stainless steel.

Connections suitable

• For connecting tubing of different diameters.
• Suitable for Glass Lined Tubing (GLT), metal and plastic tubing.

Features, benefits and applications

• Non-swaging, easy to remove fittings that will not deform tubing.
• No back ferrule required. Gives greater flexibility with regards to micro-control valves. Suitable for Glass Lined Tubing (GLT), metal and plastic tubing.

Sizes available

• 1/16" to 1/8".
• 1/16" to 1/4".

Union types

5. Union tees

6. Union cross

Material characteristics

• Stainless steel.

Connections suitable

• Union tees have the ability to have different size legs for different size tubing.

Features, benefits and applications

• Allows splitting of the flow between two or more outlets.
• Suitable for Glass Lined Tubing (GLT), metal and plastic tubing.
• Non-swaging, easy to remove fittings that will not deform tubing.
• No back ferrule required.
• The male/female tees can be stacked in order to make a manifold of 1/16" tubing which can be used for drying samples or splitting sample stream to multiple outlets.

Sizes available

• Four different tee configurations:

1. All legs for 1/16".
2. One leg 1/8" and two legs 1/16".
3. One leg 1/4" and two legs 1/16".
4. The union cross is a four port union all set up to connect 1/16" tubing.

Union types

7. Glass lined mini unions

Material characteristics

• Glass lined (GLT) stainless steel.

Connections suitable

• Connecting fused silica and capillary tubing.
• Tubing of different sizes can also be connected. However, mini union ferrules for the tubing that is different than the normal usage need to be purchased separately.

Features, benefits and applications

• Inert due to glass lining.
• Smaller in size than standard 1/16" unions, less of a heat sink and do not put extra weight on fused silica tubing connections.
• Fused silica connections due to the reduced weight and thermal mass.

Sizes available

• 0.4 mm ID (for use with tubing <0.25 mm ID).
• 0.5 mm ID (for use with tubing 0.32 mm ID).
• 0.8 mm ID (for use with tubing 0.45 and 0.53 mm ID).