This is an alternative method to using a torque wrench to install a SECO SEALS conical seal. With this method you are able to determine the contact sealing surface of the fitting and flare tube. Remember SECO SEALS conical seals are only good for one-time use only. Upon disassembly of fitting, replace with a new SECO SEALS conical seal.
How Much Torque is Enough Video
This video shows the alternative method to install a SECO SEALS conical seal when a torque wrench is not available.