Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN is a genuine two-in-one filter & regulator — a diversion-type water/particulate filter and a balanced pressure regulator built into ONE body. It has 1/4" ports, a 40 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN
The GAFR300C08ALJN is a filter and regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 1/4in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um filter element.
This model features a metal bowl and an automatic drain, making it suitable for applications where regular manual draining is impractical. The unit weighs 500 g and its flow curve is plotted to 3500 L/min at 0.7 MPa inlet, providing a sizing reference rather than a rated capacity.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| Drain type | Automatic drain |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 60 cc |
| Bracket | Not included (J) |
| Weight | 500 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. No gauge is supplied with this model — the gauge connection on a GAFR300 is 1/8" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 08 | Port size 1/4". This body offers 08 = 1/4", 10 = 3/8", 15 = 1/2". |
| A | Drain: Automatic drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| J | No bracket (J) — supplied without the mounting bracket. |
| N | No pressure gauge; 1/8" gauge connection. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
The filter and the regulator are ONE body here — there is no separate GAF filter or GAR regulator part to assemble. Need lubrication downstream too? Add a lubricator by ordering the matching GAFC300-08 F.R.L. combination instead.
Size Class & Flow Envelope
- GAFR2001/8"-1/4" · 2000 L/min
- GAFR3001/4"-1/2" · 3500 L/min
- GAFR4003/8"-1/2" · 7000 L/min
- GAFR5003/4" · 8000 L/min
- GAFR6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue at 0.7 MPa inlet pressure — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. Outlet pressure falls as flow rises, so size a body with headroom above your peak demand.
| This model | GAFR300 · 1/4" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-08 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN Is Used
Precision Fixturing
Feed a precise clamping fixture on a small assembly station where a consistent, lower pressure is critical to avoid damaging delicate parts.
Lab Air Supply
Provide filtered air to a laboratory instrument that requires a regulated supply below 0.4 MPa, ensuring the equipment operates within its safe pressure envelope.
Paint Spraying
Supply a touch-up spray gun with clean, regulated air at a lower pressure for fine finish work, where higher pressures would cause overspray or orange peel.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN the Right Air-Prep Unit?
Choose this GAFR300 for 1/4in port lines needing a lower regulated pressure band. The metal bowl (C) offers a different build option compared to PC or nylon, and the automatic drain (A) handles condensate without manual intervention. Note that the J code means no mounting bracket is included, and the N code means no gauge is fitted; the 1/8in gauge connection is available if you add one later. The L type tops out at 0.4 MPa, so if your machine may ever need more pressure, select the standard S type instead. For lines requiring lubrication downstream, order the matching GAFC300-08 combination. With this lower-pressure model, the 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, giving ample inlet margin for stable regulation.
Quick checklist
- ✓ Body size for your peak flow (1/4" here)
- ✓ Standard 0.9 MPa or lower-pressure 0.4 MPa
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Element 40 µm or 5 µm
- ✓ Bracket kept or removed (J); add a lubricator = GAFC
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, gauge/knob accessible.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure with the pressed-in self-locking knob; pull to adjust, press to lock.
- check Drain condensate before the 60 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 500 g unit on its bracket, not on the tubing.
This is a filter and regulator only — it delivers filtered, pressure-set air with no added oil. If a downstream tool needs lubrication, add a separate lubricator or order the GAFC300-08 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJN FAQ
This filter & regulator has a 1/4in port and a lower pressure range of 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C. The metal drain bowl holds 60 cc of condensate, and the unit weighs 500 g.
The J code omits the mounting bracket, which is useful for panel mounting or when using an existing bracket. The N code means no gauge is supplied; the 1/8in gauge connection is present if you need to add one. This allows you to purchase only what your specific installation requires.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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