Is the behavior of the column switching valve different in Arc HPLC system than with 2695 module? - WKB224781
ENVIRONMENT
- 2695 Separations Module
- Arc HPLC System
ANSWER
In the Alliance 2695, the column switching valve (700000425 - 2 position, 10 port valve) switches position without a change in flow rate.
In Arc HPLC, the system has a higher pressure limit. The column switching valve switches position with a flow ramp to zero and returns to the set flow rate. During a valve position change, the solvent manager flow stops momentarily while the pressure decays. This prevents exposing the column to a pressure that could damage it. If the pressure does not reach the recommended pressure before the instrument times out, the valve position change proceeds and flow resumes.
ADDITIONAL INFORMATION
id224781, 2690, 2690D, 2690DUPGD, 2690UP, 2695, 2695D, 2695DE, 2695DEB, 2695DUP, 2695E, 2695EB, 2695INERT, 2695UP, A-10SSM, EMP2LIC, EMP2OPT, EMP2SW, EMP3GC, EMP3LIC, EMP3OPT, EMP3SW, EMPGC, EMPGPC, EMPLIC, EMPOWER2, EMPOWER3, EMPSW, SUP