Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK 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 1/2" 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 size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK
The GAFR300N15LJK is a filter and pressure regulator combined into a single body, eliminating the need for separate units. It processes air through a diversion structure that spins out liquid water and solid particles, then delivers a steady outlet pressure via a balanced, self-locking regulator. This model has a 1/2in port and a nylon bowl, weighing 500 g, with a 60 cc condensate bowl.
This lower-pressure version operates from 0.15 to 0.4 MPa (20-58 psi) and comes with a 40 um element. The circular gauge is fitted with an MPa/psi scale, and the unit includes both semi-auto and manual drains. A reverse-flow (reflux) valve is attached as an ordering option, and no mounting bracket is included, making it suitable for panel-mount installations.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Nylon |
| 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 GAFR300N15LJK
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 15 | Port size 1/2". 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. |
| 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 GAFC300-15 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 · 1/2" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK Is Used
Precision pressure setting
Use this unit to set a stable, lower pressure for a sensitive pneumatic control circuit or a precision valve station where supply fluctuations must not affect the setpoint.
Panel-mounted installation
The J code means no bracket is supplied, so this unit is ideal for direct panel mounting where space is tight and the 500 g weight is supported by the panel, not the tubing.
Clean air for instruments
The 40 um filter element removes water and solid particles from the air supply, protecting downstream instruments or gauges from contamination in a laboratory or test bench setup.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port applications needing a 60 cc drain bowl and a flow curve plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl is a build choice; confirm compatibility for aggressive environments. This model has a semi-auto plus manual drain, a lower-pressure range (L) topping at 0.4 MPa, no bracket (J), a fitted gauge, a 40 um element, and PT threads with an MPa/psi scale. The reverse-flow (reflux) valve is fitted per the K code. If oil is needed downstream, order the matching GAFC300-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (1/2" 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 GAFC300-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJK FAQ
This filter & regulator has a 1/2in port, a pressure range of 0.15-0.4 MPa (20-58 psi), a max 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 drain bowl capacity is 60 cc and the unit weighs 500 g. It comes with a 40 um element, a fitted gauge, and a nylon bowl.
The K code indicates that a reverse-flow (reflux) valve is attached to this GAFR300N15LJK. It is an ordering difference; the catalogue defers the function of this valve to a separate page not included in our data, so we do not explain its operation.
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