This section describes how to connect Viper™ capillaries. The following Viper fittings are available:

  • Viper fitting with torque toothing

  • Viper fitting with knurl

Viper fittings (examples)
Figure: Viper fittings (examples)

No.

Description

1

Viper fitting, torque toothing

2

Viper fitting, knurl

When tightening or loosening a Viper capillary, observe the handling instructions for the respective fitting.

Connecting Viper Fittings with Torque Toothing

To connect Viper fittings with torque toothing, follow these steps:

NOTICE

  • Tighten or loosen Viper capillaries only with your fingers and the special torque tool. Do not use tools others than those provided by Thermo Fisher Scientific for this purpose. Use the tool only for the connections for which it is intended.
  • To avoid damage to the capillary or connection, tighten and loosen the Viper capillaries only when the system pressure is down to zero.
  • Mind the correct orientation of the tool when tightening or loosening connections (see pictures).
Viper fitting with torque toothing
Figure: Viper fitting with torque toothing

No.

Description

1

Capillary

2

Torque toothing

  1. Insert the Viper capillary into the connection port.

  2. Tighten the connection with your fingers.

  3. Use the installation tool to tighten the connection further.

  4. Tool on torque toothing for tightening connections
    Figure: Tool on torque toothing for tightening connections
  5. Tighten the connection until the torque limitation has been reached, which is indicated by a clicking sound.

  6. Check whether the connection leaks. If leakage exists, follow the steps further down.

Resolving Leakage with Viper Fittings with Torque Toothing

  1. Remove the capillary.

  2. Clean the capillary ends carefully by using a lint-free tissue wetted with isopropanol.

  3. Reinstall the capillary.

  4. If the connection continues to leak, install a new Viper capillary.

To loosen a connection, use this side of the installation tool.

Tool on torque toothing for loosening connections
Figure: Tool on torque toothing for loosening connections

Connecting Viper Fittings with Knurls

To connect Viper capillaries with knurls, follow these steps:

NOTICE

  • Tighten or loosen Viper capillaries only with your fingers. Do not use tools other than the knurl that comes with the capillary.
  • To avoid damage to the capillary or connection, tighten and loosen the Viper capillaries only when the system pressure is down to zero.
Viper fitting with knurl
Figure: Viper fitting with knurl

No.

Description

1

Knurl

2

Capillary

3

Slot

  1. Insert the Viper capillary into the connection port.

  2. Tighten the connection by the knurl.

  3. TIP

    Note the slot in the knurl. You can easily remove the knurl from the capillaries through this slot if space is limited.

  4. Check whether the connection leaks. If leakage exists, follow the steps further down.

Resolving Leakage of Viper Fittings with Knurls

  1. Tighten the connection a little more.

  2. If leakage continues, remove the capillary.

  3. Clean the capillary ends carefully by using a lint-free tissue wetted with isopropanol.

  4. Reinstall the capillary.

  5. If the connection continues to leak, install a new Viper capillary.