Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- 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 GAFR300C08LJ
This AirTAC GAFR300C08LJ is a filter and pressure regulator combined in a single body, so incoming air is spun to separate water and solids before being set to a steady outlet pressure. It has no lubricator and only one bowl, the 60 cc condensate bowl, with a metal construction.
It uses a 1/4in port and a lower-pressure regulator range of 0.15-0.4 MPa (20-58 psi), with a 40 um filtering element. The pressed-in self-locking knob resists set-pressure drift from vibration, and the circular gauge with magnifier shows the outlet pressure on an MPa/psi scale.
Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ |
|---|---|
| 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 | Semi-auto drain + manual 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR300C08LJ Is Used
Precision pressure setting
Use the lower-pressure range to set a precise 0.3 MPa for a delicate pneumatic clamp or a light press, where a standard 0.9 MPa regulator would be too coarse.
Compact machine build
The 500 g body and 1/4in port fit into a small control cabinet or on a machine frame where space is tight and a separate filter plus regulator would not fit.
Vibration-prone line
The self-locking knob holds the set pressure on a machine with constant vibration, such as a small stamping press or an indexing table, reducing the need for frequent readjustment.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C08LJ the Right Air-Prep Unit?
Choose this GAFR300 body for a 1/4in line where a compact 500 g unit with a 60 cc drain bowl fits the duty; step up to a GAFR400 for a 3/8in or 1/2in port and a 100 cc bowl. The metal bowl suits demanding environments, while the semi-auto plus manual drain gives you both automatic purging and a manual override. The L-type regulator tops out at 0.4 MPa, so confirm your machine never needs more than that; the missing bracket (J) means you must provide your own panel mount. The 40 um element is the standard grade, and the PT thread pairs with the MPa/psi gauge scale. If oil is needed downstream, order the matching GAFC300-08 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated range.
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 GAFR300C08LJ FAQ
The GAFR300C08LJ is a filter & regulator with a 1/4in port, a pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The metal drain bowl holds 60 cc, and the unit weighs 500 g.
The L in the code indicates the lower-pressure type, which tops out at 0.4 MPa instead of the standard 0.9 MPa, making it suitable for low-pressure applications. The J means the mounting bracket is not included, so you need to provide your own panel mount or use an existing bracket.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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