9
Installation Appendix: Utilization of Used Fittings and Nuts
Fitting Manufacturing Warning
During the fi rst make-up of a fi tting the front ferrule is coined or seated with the fi tting body. Coining is a
cold working process where a moderate amount of force is applied from the front ferrule to the body causing
slight plastic deformation which generates the sealing action of the ferrule and the body. During subsequent
remakes of the original body and ferrule; the ferrule re-seats and seals the connection to create a leak tight
connection. Therefore; if attempting to install a used fi tting body with new ferrules it may compromise the leak
tight integrity of the fi tting since the body was previously coined. Also, the nut and rear ferrule coin with each
other to create optimal driving force to seat the ferrules to the tube and create a leak tight connection. The
installation of used fi ttings and bodies may cause unintended leakage due to the installation of used hardware;
CIRCOR assumes no responsibility of the installation when used fi ttings are utilized, all warranties are voided.
All responsibility and liability for leakage and product failure remains solely with the installer.
Fittings up to and Including ½”/12mm – All Alloys
When using previously installed nuts and fi ttings with new ferrule sets (sizes ≤ ½” / 12mm) , the ferrules must
be set with new tubing using a manual pre-setting tool (PST). Refer to the “Manual Installation” instructions
above.
Over ½” / 12mm –All Alloys
When using previously installed nuts and fi ttings with new ferrule sets / (sizes > than ½” / 12mm), the ferrules
must be set with new tubing using the Hydraulic Pre-Setting Tool (HPST). Refer to the “HPST Installation”
instructions above.
