What do these products do in this instrument?
Tubing and fittings: connecting sources, pumps and dispensing outlets
Build the actual reagent path, confirming materials and interfaces for the formulation and receiver. Cover all connections when checking bottle-change priming, the first dose after standby and recovery after replacement.
Tubing and fittings together form sealed connections and the actual transfer path. Check formulation, inner/outer diameters, length, tube-end positioning and port geometry, including added volume in residue and arrival delay.
Design tubing and fittings as a complete wetted path
Tubing, fittings and ports jointly determine sealing, transfer volume and medium-contact coverage. Materials and dimensions must suit formulation, operating conditions and installation. Include tubing length and interface volume in priming, shared residue and arrival delay. After connection changes, recheck delivery and cleaning through the actual path.
Calculate connection volume and post-maintenance recovery
Shared volume affects liquid arrival and flushing; interface gaps may retain the previous composition. Record length, actual bore and tube insertion position. After disassembly, reprime and check seals, then compare first-cycle delivery, blanks or recovered product to confirm path recovery.
Translate actual branch conditions into configuration requirements
| Condition | To confirm |
|---|---|
| Materials and assembly | Provide formulation, tubing inner/outer diameters, length, fitting structure and port fit. |
| Volume and load | Calculate shared and replacement-component added volumes; measure actual flow and response. |
| Maintenance recovery | Record disassembly locations and added volume; recheck priming, sealing and first-cycle received results. |
| Operation | Specific operating conditions |
|---|---|
| Material compatibility | Formulation, concentration, temperature, contact duration, materials/seals and cleaning |
Material compatibility
Actual formulation, concentration, temperature and contact duration determine pump-head, seal and tubing choices. Include evaporation, crystallization, viscosity changes and shutdown flushing in testing. A single material name does not establish complete compatibility.
The pump head, seals, tubing and nozzle all contact the reagent. One material designation cannot describe the complete path. Tests must also include idle periods, cleaning and liquid changes.
Evaluate changes in materials, leakage and delivered volume over time, including shutdown cleaning, extended standby and restart
Swelling, crystallization, evaporation or adsorption can change materials and metering. Stop exposure and revise materials or maintenance procedures according to the assessment.
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| Tubing materials and dimensions | Connection paths and shared volume | Bore, length, load and actual formulation jointly determine materials and dimensions |
| Rigid-tubing fittings | Tube-end positioning and sealed connections | Check tube outer diameter, threads, seal structure and port-bottom geometry |
Confirm product roles in actual operation
| Operation | Measurements and observations | Priority checks |
|---|---|---|
| Material compatibility | Evaluate changes in materials, leakage and delivered volume over time, including shutdown cleaning, extended standby and restart | Swelling, crystallization, evaporation or adsorption can alter materials and metering performance |
Include first, middle and last batch doses, recovery after bottle changes, and extended operation with the actual medium.
Does a fitting that tightens prove the tubing assembly is suitable?
Also confirm port geometry, tube-end positioning and seal fit. Check leakage, hold-up and performance after repeated maintenance under actual conditions; thread engagement alone is insufficient.
Repeated dosing and continuous supply are different modes. Valveless metering also requires validation with the actual medium and operating conditions.