Where buffer switching occurs in the instrument
Establish whether buffer switching occurs in preparation, loading or separation. Select the valve path for port pressures, media and shared-section volume, and validate composition and residue after displacement.
Estimate displacement from the shared volume, then use a measurable signal to confirm stability. A multiport valve selects sources; suitability for a separation branch also depends on the pressure it experiences.
Product responsibilities in this operation
Valves control the current source or destination; the associated drive performs metering or transfer. Port connections, actual positioning and shared-segment renewal must match the operation.
For protein and antibody buffer switching, confirm all ports, valve states, pressures in each state, shared volume and exchange volume.
Organize the sequence by actual architecture
- Locate buffer switching in the preparation, loading or pressurized separation branch first. Record media, pressures and target composition for each valve state separately.
- Select source-selection or high-pressure switching configurations suitable for that branch. Check port maps, interfaces and coordinated drives, and switch only in permitted states.
- Plan flushing from the shared volume, then use a method-appropriate signal to confirm arrival and stability of the new composition.
- Check residue, protein recovery and blanks after challenging switches. Evaluate low-pressure source selection and pressurized separation configurations separately.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | All ports, valve states, pressures in each state, shared volume and flushing volume |
| Acceptance target | Check unintended connections, leakage, backflow and post-switching residue in each state; measure flushing volume and arrival delay through the complete path |
| Fault localization | Misalignment, shared-segment residue or abnormal switching pressure may affect the next task |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| MRV3 multiport rotary valve | Multiple-source selection | Compare 10-, 16- and 24-port options and port diagrams; verify high-pressure suitability separately |
Validate operation results at the receiver
Check unintended connections, leakage, backflow and post-switching residue in each state; measure flushing volume and arrival delay through the complete path.
Compare recovery and blanks before and after the complete path, and check the response after buffer switching.
Locate abnormalities and restore the next operation
Misalignment, shared-segment residue or abnormal switching pressure may affect the next task.
Stop the pump, check port states and flush again after recovery.
A material name alone does not establish low adsorption. Confirm sample preparation, loading and pressurized separation branches separately.