Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJK 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 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 GAFR300C08ALJK
The GAFR300C08ALJK is a filter and pressure regulator combined in a single body, saving rail space and reducing potential leak points versus separate units. It delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um element, and its metal bowl suits demanding environments.
This model features an automatic drain to expel condensate without manual attention, and the included circular gauge with MPa/psi scale lets you monitor the set pressure directly. The reverse-flow valve is fitted as an ordering option, and the unit weighs 500 g with a 60 cc condensate bowl.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJK |
|---|---|
| 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. 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 GAFR300C08ALJK
| 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. |
| (blank) | Circular pressure gauge fitted. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFR300C08ALJK Is Used
Precision pressure setting
Use the lower 0.15-0.4 MPa range to set a stable, reduced pressure for a sensitive pneumatic control circuit or a precision regulator station on a small assembly machine.
Compact machine build
The single-body design with no bracket saves panel space on a compact automation cell, while the metal bowl protects the filter element in a workshop with occasional impacts.
Unattended condensate removal
Fit this on a lightly loaded air line feeding a single actuator where the automatic drain removes water without scheduled manual checks, keeping the 60 cc bowl from overflowing.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALJK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in ports and a 3500 L/min flow envelope plotted at 0.7 MPa inlet; step up to the GAFR400 for 3/8in or 1/2in ports with a 7000 L/min envelope. The metal bowl (C) is a build choice with the same 1.0 MPa max and -5 to 70 C rating as PC or nylon, so confirm compatibility for aggressive surroundings. The automatic drain (A) suits unattended or wet lines, while the lower-pressure type (L) tops out at 0.4 MPa; if you may need more, select the standard S type. This unit ships without the mounting bracket (J), so plan for panel mounting or an existing bracket, and the fitted gauge reads MPa/psi with PT threads. The 40 um element is the standard grade, and the reverse-flow (reflux) valve is fitted per the K code. If your line needs oil 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 GAFR300C08ALJK FAQ
The GAFR300C08ALJK is a filter & regulator with a 1/4in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C (must not freeze). It has a 60 cc condensate bowl and weighs 500 g.
The K code indicates that a reverse-flow (reflux) valve is fitted as an ordering difference. The catalogue does not detail its function in our data, so treat it as a specified option for this unit. This model also has a metal bowl and an automatic drain.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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