Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN 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 3/8" 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 size3/8"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN
The GAFR400C10LJN is a filter and pressure regulator combined into a single body, so it cleans incoming air and sets a steady outlet pressure without needing separate units. This model uses a 3/8in port, a metal bowl, and a 40 um element, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi).
Its 100 cc condensate bowl collects water and solids spun out by the diversion structure, and the 880 g weight indicates a unit that needs proper panel mounting rather than support from tubing. No gauge is fitted, but the 1/4in gauge connection is ready for one if you need to read the set pressure.
Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 3/8" (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 | 100 cc |
| Bracket | Not included (J) |
| Weight | 880 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 GAFR400 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN
| GAFR400 | GA400 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). |
| 10 | Port size 3/8". This body offers 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. |
| N | No pressure gauge; 1/4" 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 GAFC400-10 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 | GAFR400 · 3/8" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-10 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN Is Used
Low-pressure assembly fixtures
Feed a bench-mounted press or a light clamping fixture that only needs 0.15-0.4 MPa to hold parts without damage. The 40 um filter keeps small debris away from sensitive pneumatic valves.
Lab air supply lines
Supply a test bench or a small instrument that requires a gentle, steady pressure below 0.4 MPa. The metal bowl resists knocks in a busy lab, and the semi-auto drain keeps condensate manageable.
Paint or spray booth controls
Regulate pilot air for spray equipment or control panels where higher pressure is unnecessary. The 100 cc bowl holds enough condensate for a full shift, and the 3/8in port suits short branch lines.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN the Right Air-Prep Unit?
Choose this GAFR400C10LJN for lines where the regulated output never needs to exceed 0.4 MPa (20-58 psi), such as light-duty actuation or low-pressure circuits. The metal bowl suits demanding environments, while the semi-auto plus manual drain gives you both automatic condensate release and a manual override. The J code means no mounting bracket is included, so plan for a panel mount or an existing bracket, and the missing gauge means you will need to add one via the 1/4in connection if you want to monitor pressure. If your line needs oil downstream, order the matching GAFC400-10 combination instead, since this unit does not lubricate. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the regulated range, which is comfortable for maintaining a stable setpoint.
Quick checklist
- ✓ Body size for your peak flow (3/8" 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 100 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 880 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 GAFC400-10 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR400C10LJN FAQ
The GAFR400C10LJN is a filter & regulator with a 3/8in port, a 0.15-0.4 MPa (20-58 psi) pressure range, a 40 um element, and a metal bowl. Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and the temperature range is -5 to 70 C. The drain bowl holds 100 cc and the unit weighs 880 g. It has a semi-auto plus manual drain and no gauge.
The L in the code means lower-pressure regulation, capping output at 0.4 MPa (20-58 psi) instead of the standard 0.9 MPa. The J code omits the mounting bracket, so you must use a panel mount or an existing bracket. This combination suits fixed installations where low pressure is sufficient and space is tight.
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