Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN 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 materialMetal
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN
The GAFR400C15LJN combines a filter and a pressure regulator in one metal-bodied unit, so incoming air is spun to separate water and solids before the balanced regulator sets a steady outlet pressure. This 1/2in model operates in the lower 0.15-0.4 MPa (20-58 psi) band with a 40 um element, and it has no gauge fitted.
The metal bowl holds 100 cc of condensate, and the unit weighs 880 g, placing it in the mid-size class where a panel or frame mount is advisable rather than supporting it from the tubing. Both semi-auto and manual drains are fitted, and the pressed-in self-locking knob helps resist set-pressure drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN |
|---|---|
| Series | GAFR400 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 | 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 GAFR400C15LJN
| 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). |
| 15 | Port size 1/2". 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 GAFC400-15 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 | GAFR400 · 1/2" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN Is Used
Precision valve actuation
Feed a bank of precision pneumatic valves on a packaging line where the lower 0.15-0.4 MPa band protects sensitive actuators from over-pressure.
Machine tool coolant circuits
Supply filtered air to a machine tool's coolant control system, where the metal bowl resists the occasional splash of cutting fluid.
Test bench air supply
Provide a stable low-pressure air source for a laboratory test bench, with the manual drain allowing quick purging between test runs.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN the Right Air-Prep Unit?
Choose this GAFR400C15LJN when you need a 1/2in port with a lower-pressure 0.15-0.4 MPa range, a metal bowl for demanding environments, and no bracket or gauge. The semi-auto plus manual drain suits lines where someone checks the bowl regularly, while the A code would give an automatic drain for unattended operation. If you need a gauge later, the 1/4in connection is ready for one, and the PT thread means the scale would read MPa/psi. For lines needing oil downstream, order the matching GAFC400-15 combination instead of this unit. Max supply 1.0 MPa leaves 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 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 GAFC400-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR400C15LJN FAQ
The GAFR400C15LJN is a filter & regulator with a 1/2in port, operating from 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 100 cc metal drain bowl, weighs 880 g, uses a 40 um element, and has no gauge fitted (1/4in connection available).
The J code means the mounting bracket is omitted, which suits panel-mount installations or existing bracket setups. The N code means no gauge is supplied, so you cannot read the set pressure directly; you would add a gauge to the 1/4in connection if needed. Both options reduce initial cost when you already have these components.
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