Agilent Technologies 1290 Infinity User Manual page 114

3
LC Injector HTC/HTS Description and Installation
Injection Valve
To specify a limit number of maximum penetrations into the Needle Seal is
not practicable. It is advised to check the tightness of the seal daily or
weekly when first using the LC Injector HTC/HTS System to gain
experience with the specific use in the laboratory related to the
application.
The following simple test provides assurance of tightness:
1 Take the Needle Seal out of the valve port.
2 Manually insert a syringe needle gauge 22 (or Gauge 22S) from top down
3 If a restriction is observed, continue to use the Needle seal. If not, replace
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into the tube, passing the sealing point of the ferrule.
the Needle Seal.
Agilent 1290 Infinity LC Injectors HTC/HTS User Manual