What do these products do in this instrument?
Tubing pinch-off solutions: flexible-branch isolation and drainage control
Control pinch-operated gas or liquid branches according to vacuum, discharge cycles and maintenance needs. Match tubing and fittings to inlet media, and check closed-state leakage and open-state resistance.
Discuss tubing pinch-off for the specific project. Tubing and fittings define the liquid-contact path. Validate tubing material, wall thickness, pinch seal and replacement procedure together, and assess cleaning or sterilization across the complete path.
Match the pinch location to tubing condition
Confirm pinch-off and release conditions for the actual tubing material, ID/OD, wall thickness and operating pressure. Identify isolation locations and permitted flow states, and check that actuator motion and tubing reopening are compatible.
Check pinch sealing and recovery after replacement
Measure leakage when clamped and flow when released, including actual cycles and post-maintenance checks. After replacing tubing, reconfirm positioning, sealing and restart performance. Validate cleanliness of the complete section together with its connections, assembly and cleaning procedure.
Translate actual branch conditions into configuration requirements
| Condition | To confirm |
|---|---|
| Tubing conditions | Confirm material, inner and outer diameters, wall thickness and actual pressure. |
| Pinch-off and power-loss states | Check pinch location, action timing and the acceptable state after power loss. |
| Maintenance recovery | Check leakage when pinched, flow when released and repeatability after tubing replacement. |
| Operation | Specific operating conditions |
|---|---|
| Flexible-tube control | Tubing material, OD/wall thickness, pressure/vacuum, pinch-off and cycle count |
Compare product configurations by the roles on this page
Confirm this tubing-pinch option against the actual medium, pressure, connections and operating procedure. This page describes application roles and validation conditions; discuss specific product configurations for the project.
Explore specific operating and validation tasks
Flexible-tube control
Tube bore, wall thickness and material affect aspiration and pinch reliability. After replacement, test leakage and repeated actions in the installed arrangement.
Confirm product roles in actual operation
| Operation | Measurements and observations | Priority checks |
|---|---|---|
| Flexible-tube control | Measure closed-state leakage, open-state resistance and tubing condition after cycling. Check complete-path sealing and contamination-control boundaries after maintenance. | Tube fatigue, incorrect installation or differential pressure outside configuration limits may prevent closure |
Check actual drainage/aspiration, gas tightness and effects on sample-gas composition. Validate recovery after maintenance.
Does clamping tubing establish sterile isolation?
Evaluate the complete tubing, fittings, assembly and cleaning or sterilization procedure. Pinching only establishes opening or closure at a particular location.
Liquid flow, unloaded gas flow and gas-liquid drainage capability are not interchangeable. An absorbent-liquid pump is not necessarily suitable as a sample-gas pump.