The Solvent Selection Valve (Ssv) - Agilent Technologies 1260 Infinity User Manual

13
Hardware Information

The Solvent Selection Valve (SSV)

The Solvent Selection Valve (SSV)

The solvent selection valve is available optionally and as an upgrade. It
allows using four different solvents for binary pumps. The available
channels are A1/A2 and B1/B2. The valve can switch between positions 1
and 2, i.e. two different solvents are available per channel. It is not
possible to switch for example between A1 and B1 for channel B, as
solvent paths A and B are completely separated. By cascading SSV
channels, for example using inlets A1 and A2 and connecting the outlet of
channel A to inlet B1, it is possible to switch between three (A1/A2/B2)
solvents for one channel (here: B) and using always the same solvent for
channel A.
Technically, the 1260 Infinity SSV uses two electromagnetic valves. If the
current is off, inlets A2 and B2 are connected to the outlet. If the current
is on, the valves switch to A1 and/or B1. This means, if the pump is
switched off physically, solvent connections use inlets A2 and B2. If the
pump is in standby (for example after using the Off button in
ChemStation), the SSV retains its previous state.
Unused channels of an SSV should always be blocked using a plug (Blank
plug (5041- 8365)) in order to avoid leaks or air entering the solvent
channels.
236 1260 Infinity Binary Pump User Manual