Auxiliary liquid circulation: flow, temperature and pulsation tolerance

01Locate the source, drive and receiving position for this task

Define actual flow, cumulative volume, allowable flow interruptions, backpressure, refills and operating duration. Follow the diagram to confirm liquid contact, pressure and destination before assigning drive and connection roles.

02Specify circulation load together with target temperature

Specify circulation conditions required by the thermal load or method, including temperature, resistance, flow and permissible pulsation. Rated pump flow does not directly establish temperature-control performance; assess heat exchange and loop volume together.

03Compare product options against task requirements

The following candidate options match this page's responsibilities. Compare them against the operating conditions described, then check capacity, materials and interfaces on the product pages. Card images show representative configurations; suitability must still be confirmed at actual operating points and by application results.

04Fill and vent before extended operation

Confirm loop filling and air removal before starting. Monitor the source, temperature and abnormal pressure. Reprime after shutdown or maintenance, and confirm dry-running tolerance for the specific model.

Action records should link commands, valve or interface states and actual received results. When raw material, container or sample identity changes, reconfirm shared paths and conditions permitting the next step. Completion of drive movement alone does not replace task acceptance.

05Assess flow and recovery at actual operating temperature

Measure installed flow, long-duration operation and recovery to the target state at actual temperature and load. For temperature anomalies, check heat exchange, air, resistance and supply together rather than only increasing speed.

Record test medium, configuration, installed path and operating sequence; present routine operating points and boundary results separately. Calculations support design discussions, component documentation checks models, and installed measurements confirm the actual task.

06After an abnormality or maintenance, first identify which segment needs recovery

An empty source, bubbles, slip, pressure changes or resets can disturb sustained output. Reconcile undelivered volume and process state before restarting to avoid duplicate additions.

Retain current source, container identity, completed actions, valve or interface state and actual receiving information. Use the table to locate the stage that changed before deciding to retry, continue or restart. After recovery, recheck the relevant operating point before returning an uncertain action to the automatic cycle.

07Continue with tasks on the same branch

References

Related guides

• Pressure and blockage monitoring: establish action baselines before fault thresholds
• Tubing Materials and Dimensions: Volume, Resistance and Maintenance Layout
• Working-liquid replenishment: reservoir demand, level hysteresis and recovery