Laboratory Vacuum Pump GM-0.20 GM-0.5II GM-0.5IIP GM-0.5 GM-0.5P GM-0.33II GM-0.33IIP GM-1.0 GM-1.0P
Oil-free diaphragm vacuum pumps with 15-30 L/min evacuation speeds and dual vacuum/pressure capabilities for laboratory applications.
Louise Corscadden, PhD
Neuroscience · ConductScience
Ask Louise about Laboratory Vacuum Pump GM-0.20 GM-0.5II GM-0.5IIP GM-0.5 GM-0.5P GM-0.33II GM-0.33IIP GM-1.0 GM-1.0P fit, setup, configuration, or quote prep.
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The GM Series Laboratory Vacuum Pumps are oil-free diaphragm pumps designed for vacuum and pressure applications in research laboratories. These pumps feature single or dual head configurations with evacuation speeds ranging from 15-30 L/min and ultimate pressures down to 0.075 MPa. The pumps operate within a working temperature range of 7-40°C and provide both vacuum (up to 250 mbar) and positive/negative pressure capabilities (30 psi).
Each pump includes standardized φ6mm connections for inlet, outlet, and silencer ports, facilitating integration with laboratory vacuum manifolds and filtration systems. The diaphragm design eliminates oil contamination risks while providing consistent performance across varied laboratory conditions. Multiple model variants accommodate different throughput requirements and operational configurations.
How It Works
The GM Series pumps utilize a diaphragm-based mechanism where a flexible membrane oscillates within a pump chamber to create alternating compression and expansion cycles. During the expansion phase, inlet valves open and vacuum draws sample through the system, while outlet valves remain closed. During compression, inlet valves close and outlet valves open, expelling the processed medium.
The oil-free design eliminates contamination risks by using dry compression chambers with PTFE or similar chemically inert diaphragm materials. Multiple pump heads can operate in parallel to increase throughput while maintaining vacuum consistency. The system achieves ultimate pressures through progressive evacuation cycles, with final vacuum levels determined by diaphragm efficiency and system leak rates.
Pressure regulation occurs through integrated relief valves and flow control mechanisms that maintain consistent conditions during operation. The φ6mm port standardization ensures compatibility with standard laboratory tubing and connection systems.
Features & Benefits
Automation Level
- manual
Pump Head
- 1
2
- 1
1
- 2
Speed of Evacuation
- 15L/Min
30L/Min
- 20L/Min
Ultimate Pressure
- 0.075Mpa
0.095Mpa
- 0.08Mpa
Vacuum
- 250mbar
50mbar
- 200mbar
Pressure
- 30 psi positive or negative pressure
Inlet
- φ6mm
Outlet
- φ6mm
Silencer
- φ6mm
Working Temp.
- 7~40℃
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Cell Biology
- Environmental Monitoring
- Materials Science
- Microbiology
- Pharmaceutical QC
Weight
- 29.98 kg
Dimensions
- L: 42.0 mm
- W: 43.6 mm
- H: 38.0 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Evacuation Speed Range | 15-30 L/min depending on model configuration | Entry-level models often limited to single fixed speeds | Multiple speed options allow researchers to match pump capacity to specific sample volumes and processing requirements. |
| Pump Head Configuration | Single or dual head options available | Many models offer only single head configurations | Dual head capability provides redundancy and higher throughput for demanding applications. |
| Pressure/Vacuum Versatility | Supports both vacuum (250 mbar) and pressure (30 psi positive/negative) | Most pumps are designed for vacuum-only operation | Dual capability eliminates the need for separate pressure and vacuum pumps in versatile laboratory setups. |
| Connection Standardization | φ6mm standardized ports for inlet, outlet, and silencer | Port sizes vary by manufacturer and model | Standardized connections simplify integration with existing laboratory tubing systems and reduce adapter requirements. |
| Operating Temperature Range | 7-40°C operational range | More restrictive temperature ranges common in basic models | Wide temperature tolerance accommodates varied laboratory environments without performance compensation. |
The GM Series provides multiple evacuation speeds, flexible pump head configurations, and dual vacuum/pressure capability within standardized connection systems. The oil-free diaphragm design eliminates contamination risks while maintaining consistent performance across typical laboratory temperature ranges.
Practical Tips
Verify evacuation speed monthly using a calibrated flow meter connected to the outlet port under standard atmospheric conditions.
Why: Flow rates can drift over time due to diaphragm wear and valve deterioration.
Inspect inlet filters weekly during heavy use periods and replace when flow restriction becomes apparent.
Why: Clogged inlet filters reduce evacuation efficiency and increase operating temperatures.
Allow 5-10 minutes warm-up time before critical applications to achieve stable ultimate pressure.
Why: Diaphragm temperature affects membrane flexibility and sealing characteristics.
If ultimate pressure degrades, check all φ6mm connections with leak detection solution before assuming pump failure.
Why: System leaks are the most common cause of poor vacuum performance in laboratory setups.
Record pump operating hours and evacuation performance in a maintenance log for trend analysis.
Why: Performance trending helps predict maintenance needs and validates data quality in critical applications.
Never operate with blocked outlet ports as this can damage diaphragms and create excessive back-pressure.
Why: Diaphragm pumps require free outlet flow to prevent membrane stress and mechanical damage.
Use in-line moisture traps when processing samples with high water content to protect internal components.
Why: Excess moisture can affect diaphragm materials and reduce pump longevity in biological applications.
Setup Guide
What’s in the Box
- GM Series vacuum pump (model as specified)
- Power cord with regional plug configuration
- Inlet/outlet tubing connectors (φ6mm)
- Silencer assembly
- Operating manual and specifications sheet
- Warranty documentation (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support available for operational guidance and troubleshooting assistance.
Compliance
References
Background reading relevant to this product:
What is the ultimate vacuum level achievable with these pumps?
The GM Series achieves ultimate pressures ranging from 0.075 to 0.095 MPa depending on model, corresponding to vacuum levels of 250 mbar (with some models reaching 50-200 mbar range).
How do I select between single and dual pump head configurations?
Choose single head for basic applications up to 15 L/min, or dual head configurations for higher throughput requirements up to 30 L/min evacuation speeds.
What tubing sizes are compatible with these pumps?
All inlet, outlet, and silencer ports use standardized φ6mm connections, compatible with standard laboratory tubing systems.
Can these pumps handle both vacuum and pressure applications?
Yes, the pumps support both vacuum operation (up to 250 mbar) and positive/negative pressure applications up to 30 psi within the same system.
What maintenance is required for oil-free operation?
The diaphragm design requires periodic inspection of membrane integrity and valve function, with no oil changes needed due to the oil-free design.
What is the operating temperature range for consistent performance?
The pumps maintain specifications within 7-40°C, covering typical laboratory environmental conditions without thermal compensation.
How do I verify pump performance after installation?
Perform leak testing with sealed inlet, measure evacuation speed against specifications, and verify ultimate pressure achievement under standard conditions.
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