What do these products do in this instrument?
Gas-Liquid Diaphragm Pumps: Suitable Sample-Gas or Gas-Liquid Aspiration
Provide aspiration in gas or gas-liquid paths permitted by the configuration, accounting for inlet state and system vacuum. Identify whether the branch carries sample gas or air-containing condensate. Check gas tightness, target composition and actual drainage separately.
DPGL800 handles gas or gas–liquid aspiration permitted by its specific configuration. Check inlet gas content, foam, peak inflow and container vacuum; use a separately suitable solution for continuous liquid-only transfer.
Liquid diaphragm pumps: absorbent-liquid addition or auxiliary circulation
Supply the method-required absorbent liquid through its liquid branch, accounting for formulation, backpressure and the gas-liquid contact unit. Verify absorbent-liquid flow separately from sample-gas aspiration capability. Assess complete analytical results using the actual method.
Compare DPL30, DPL60 and DPL30H against the actual absorbent formulation and supply load. Tubing, valves and receiving-vessel pressure determine installed flow; measure delivery and recovery after refilling at the contact vessel.
Define liquid-supply and aerated-aspiration branches separately
An absorbent-supply branch delivers liquid to the contact vessel; a condensate drain removes liquid collected from the sample-gas path. Define the inlet phase and destination for each pump. Use a liquid-transfer configuration for the actual absorbent and a configuration suited to the gas-liquid state encountered during drainage. A drain must preserve the intended gas-path pressure and sealing arrangement.
Match absorbent supply and drainage to the operating gas path
For absorbent supply, measure installed liquid flow and cumulative delivery under the actual vessel backpressure, including bottle changes and the permitted interruption. For drainage, compare removal with peak condensate accumulation and test the full receiver or blocked-outlet response. Check whether opening or running the drain admits air, leaks sample gas or disturbs gas flow before accepting the next measurement.
Translate actual branch conditions into configuration requirements
| Condition | To confirm |
|---|---|
| Inlet medium | Distinguish liquid-only flow, intermittent gas entrainment and foam, and confirm the aspiration modes permitted by the configuration. |
| Tubing and containers | Provide suction lift, outlet load, tubing and waste-container conditions. |
| Actual supply and removal | Measure absorbent delivery at the contact vessel and condensate accumulation at the drain. Check source depletion, full receiver, blockage and gas-path pressure during recovery. |
| Operation | Specific operating conditions |
|---|---|
| Condensate drainage | Liquid or gas-liquid inlet conditions, peak incoming flow, allowable accumulation, lift and waste container |
| Absorbent-liquid supply | Actual flow, cumulative volume, allowable interruptions, backpressure, refills and operating duration |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| DPGL800 gas–liquid diaphragm pump | Suitable gas–liquid aspiration or container-vacuum branches | Confirm inlet medium and waste architecture; not for continuous liquid-only transfer (100% liquid) |
| DPL30 liquid diaphragm pump | Liquid supply or auxiliary circulation | Select by installed resistance, actual wash or working fluid and task window |
| DPL60 liquid diaphragm pump | Liquid supply or auxiliary circulation | Judge by peak demand and installed operating point, not free flow alone |
| DPL30H high-backpressure liquid diaphragm pump | Liquid branches requiring higher backpressure capability | Calculate pressure budget and actual flow first, then confirm interfaces and materials |
Explore specific operating and validation tasks
Condensate drainage
Drainage under vacuum involves sealing and sample-gas bypass leakage as well as liquid flow. Confirm the configuration for temperature, acidity, drainage interval and inlet gas content.
Absorbent-liquid supply
Validate absorbent-liquid addition or circulation with the actual formulation, flow and backpressure. Gas-liquid contact efficiency and final gas-analysis results require evaluation of the complete system.
Confirm product roles in actual operation
| Operation | Measurements and observations | Priority checks |
|---|---|---|
| Condensate drainage | Test emptying, liquid accumulation and interlocks after a full-vessel or blockage condition using the actual incoming liquid. | Leaks, foam, blockages or a full container can reduce actual drainage capacity. |
| Absorbent-liquid supply | Measure operating-flow trends and cumulative volume, including refill interruptions. Evaluate proportioning, process or analytical results according to the task. | An empty source, bubbles, slip, pressure changes or resetting can disturb continuous output. |
Check actual drainage/aspiration, gas tightness and effects on sample-gas composition. Validate recovery after maintenance.
Does absorbent-liquid flow establish sample-gas handling capacity?
Absorbent delivery, sample-gas flow and condensate removal have separate operating points. Establish the liquid required by the contact unit, the gas flow and pressure required by the analytical method, and the peak condensate load. Verify each branch in the assembled system and check the first valid analytical result after an interruption.
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.
References
View references (4)
- [1]FOREACH DPGL800 gas–liquid diaphragm pump: configurations and specifications
- [2]FOREACH DPL30 liquid diaphragm pump: configurations and specifications
- [3]FOREACH DPL60 liquid diaphragm pump: configurations and specifications
- [4]FOREACH DPL30H high-backpressure liquid diaphragm pump: configurations and specifications