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Product Overview
The 2509-A Two-Stage WOB-L Piston Vacuum Pump is a compact, oil-less vacuum pump built for deep-vacuum service. Running on standard 115V / 60Hz power, it pulls to 29 in-Hg (98%) of vacuum, with up to 2.50 cfm (70.7 L/min) of open flow. Its two-stage design trades higher flow for a greater ultimate vacuum, making it well suited to vacuum bagging and infusion work that demands a deeper pull, as well as a range of laboratory and industrial vacuum applications.
Because the 2509-A uses an oil-less, two-stage WOB-L piston mechanism, process air stays free of lubricant contamination while still reaching a deeper vacuum than single- or twin-head designs. A thermally protected motor (145 °C ± 5 °C cutoff) safeguards against overheating, while the pump's compact, panel-mountable footprint (7.13 × 9.72 × 9.88 in) makes it easy to integrate into existing equipment, benchtop setups, or OEM systems.
Whether you're vacuum bagging a composite layup that needs a deep, consistent pull, degassing resin, or supporting general-purpose lab and industrial vacuum needs where ultimate vacuum matters more than raw flow, the 2509-A offers oil-free reliability in a lightweight, easy-to-mount package.
Key Features
- Oil-less operation, discharge / process air stays free of lubricant contamination.
- Two-stage WOB-L piston design for deep vacuum to 29 in-Hg (98%).
- Thermally protected motor, built-in 145 °C ± 5 °C thermal switch helps prevent motor damage from overheating.
- Compact and lightweight, with a panel-mountable footprint.
- Well suited to deep-vacuum bagging / infusion and general lab / industrial vacuum service.
Specifications
| Specification | Value |
|---|---|
| Model | 2509-A |
| Pump Type | Two-stage WOB-L piston, oil-less |
| Thermal Protection | Yes (145 °C ± 5 °C) |
| Operating Voltage | 115 V |
| Frequency | 60 Hz |
| Motor Full-Load Current | 3.9 A (nameplate) |
| Capacitor | 7 mfd |
| Open Flow @ 60 Hz | 2.50 cfm (70.7 L/min) |
| Flow @ 15 in-Hg | 0.75 cfm (21.3 L/min) |
| Max Vacuum @ 60 Hz | 29 in-Hg (98%) |
| Intake Port | 1/4-18 NPT (Port A) |
| Exhaust Port | 1/4-18 NPT (Port E) |
| Operating Temperature (Environment) | 10 °C to 40 °C |
| Cord Lead Length | 6 ft ± 3 in |
| Dimensions (W × D × H) | 7.13 × 9.72 × 9.88 in |
Performance, Nominal Flow at 115 V / 60 Hz
| Vacuum (in-Hg) | Vacuum (%) | Flow (cfm) | Flow (L/min) |
|---|---|---|---|
| 0 | 0% | 2.50 | 70.7 |
| 5 | 17% | 1.31 | 37.0 |
| 10 | 34% | 1.04 | 29.5 |
| 15 | 51% | 0.75 | 21.3 |
| 20 | 68% | 0.48 | 13.7 |
| 25 | 85% | 0.21 | 6.0 |
| 28.6 | 97.5% | 0.01 | 0.3 |
Common Applications
- Vacuum bagging for composite and fiberglass layups requiring a deep, consistent pull
- Resin infusion work where ultimate vacuum depth is critical
- Vacuum degassing and resin/epoxy bubble removal
- Laboratory vacuum filtration and sample prep requiring deep vacuum
- General industrial vacuum handling and process support
Frequently Asked Questions
What is the maximum vacuum the 2509-A can pull?
The 2509-A is rated to pull to 29 in-Hg (98%) of vacuum at 60 Hz, the deepest vacuum in the WOB-L piston pump lineup, thanks to its two-stage design.
What is the open flow rate of the 2509-A vacuum pump?
At 60 Hz, the 2509-A produces an open flow rate of 2.50 cfm (70.7 L/min). At 15 in-Hg of vacuum, flow drops to 0.75 cfm (21.3 L/min).
How does flow change as vacuum increases on the 2509-A?
Flow decreases as vacuum depth increases: 2.50 cfm at 0 in-Hg, 1.31 cfm at 5 in-Hg, 1.04 cfm at 10 in-Hg, 0.75 cfm at 15 in-Hg, 0.48 cfm at 20 in-Hg, 0.21 cfm at 25 in-Hg, and 0.01 cfm near its maximum around 28.6 in-Hg (97.5%).
Is the 2509-A an oil-less vacuum pump?
Yes. The 2509-A uses an oil-less, two-stage WOB-L piston design, so the process air and exhaust stay free of lubricant contamination, making it a good fit for applications where clean, deep vacuum is required.
What's the difference between the two-stage 2509-A and the 2507-A or 2508-A pumps?
The 2509-A uses a two-stage design that trades open flow for a deeper ultimate vacuum: it pulls to 29 in-Hg (98%) versus 26.6 in-Hg (roughly 91%) for the single-head 2507-A and twin-head 2508-A, but at a lower open flow of 2.50 cfm. Choose the 2509-A when the process needs the deepest possible vacuum, choose the 2507-A or 2508-A when higher flow matters more.
Can the 2509-A be used for vacuum bagging and infusion?
Yes. Its deep ultimate vacuum (29 in-Hg) and oil-free operation make it well suited to vacuum bagging and infusion processes that demand a deeper, more consistent pull than standard single- or twin-head pumps provide.
What voltage and frequency does the 2509-A require?
The 2509-A operates on standard 115 V, 60 Hz power and draws a nameplate full-load current of 3.9 A.
What size are the intake and exhaust ports?
Both the intake (Port A) and exhaust (Port E) use 1/4-18 NPT threaded ports.
Does the 2509-A have overheat protection?
Yes. It includes a built-in thermal protection switch that trips at 145 °C ± 5 °C to help prevent motor damage.
What are the dimensions and mounting considerations?
The 2509-A measures 7.13 × 9.72 × 9.88 in and is designed with a compact, panel-mountable footprint for easy integration into benchtop or OEM setups.
What is the recommended operating environment for the 2509-A?
The pump is rated for ambient operating temperatures between 10 °C and 40 °C.
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Data Sheets
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