Where tubing control fits in the instrument
Check tubing material, bore size, wall thickness, vacuum and leakage separately for gas or liquid paths. Validate pinch action, cycle life and maintenance replacement in the installed configuration.
Tube bore, wall thickness and material affect aspiration and pinch reliability. After replacement, test leakage and repeated actions in the installed arrangement.
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 this sample-gas and condensate task, define tubing material, OD and wall thickness, pressure or vacuum, closure and cycle count.
Organize the sequence by actual architecture
- Identify whether the pinch location is in a gas or liquid branch. Record tubing material, bore, wall thickness and actual positive and negative pressures.
- Clamp and release according to the drainage or maintenance program. Check closed-state leakage, open-state flow and tubing behavior under vacuum separately.
- After tubing replacement or maintenance, recheck sealing, cycling and effects on sample-gas composition or liquid destinations in the installed configuration.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Tubing material, OD/wall thickness, pressure/vacuum, pinch-off and cycle count |
| Acceptance target | Measure closed-state leakage, open-state resistance and tubing condition after cycling. Check complete-path sealing and contamination-control boundaries after maintenance. |
| Fault localization | Tube fatigue, incorrect installation or differential pressure outside configuration limits may prevent closure |
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.
Validate operation results at the receiver
Measure closed-state leakage, open-state resistance and tubing condition after cycling. Check complete-path sealing and contamination-control boundaries after maintenance.
Check actual drainage/aspiration, gas tightness and effects on sample-gas composition. Validate recovery after maintenance.
Locate abnormalities and restore the next operation
Tubing fatigue, incorrect installation or differential pressure beyond configuration limits can cause shutoff failure.
Isolate and replace defective tubing, then revalidate the complete path.
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.