Airtac GAFR Adjustable Filter Regulator GAFR400C15LN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15LN 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 GAFR400C15LN
The GAFR400C15LN is a filter & regulator combining air filtration and pressure regulation in a single body, eliminating the need for separate units. It handles a 1/2in port with a lower pressure range of 0.15-0.4 MPa (20-58 psi) and uses a 40 um element to trap solid particles.
Its 100 cc metal condensate bowl collects separated water and debris, while the semi-auto and manual drains provide flexible maintenance. Weighing 880 g, this unit is built for stable panel mounting, and the integrated design reduces potential leak points compared to a two-part setup.
Airtac GAFR Adjustable Filter Regulator GAFR400C15LN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15LN |
|---|---|
| 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 | Included |
| 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 GAFR400C15LN
| 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). |
| (blank) | Mounting bracket included. |
| 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 GAFR400C15LN Is Used
Precision pressure control
Feed a precision pneumatic valve or a small clamping fixture that requires a stable, lower supply pressure. The balanced regulator holds the setpoint as line pressure varies, and the 40 um filter protects sensitive components.
Machine tool coolant lines
Use on a machine tool's air circuit where a consistent 0.15-0.4 MPa output is needed for actuation. The metal bowl resists impacts in a busy shop, and the 100 cc capacity reduces frequent draining.
Test bench air supply
Provide clean, regulated air to a laboratory test jig or calibration setup. The filter removes water and particulates, while the lower pressure range suits delicate instrumentation that must not see higher pressures.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15LN the Right Air-Prep Unit?
Choose the GAFR400 body for 1/2in port applications needing a 100 cc drain bowl and a flow envelope plotted to 7000 L/min at 0.7 MPa inlet. The metal bowl (C) suits demanding environments, while the lower pressure type (L) is ideal for sensitive circuits, but confirm it never needs more than 0.4 MPa. This model includes a mounting bracket and has no gauge, so plan to add one via the 1/4in connection if readout is required. The 40 um element handles general filtration, and the semi-auto plus manual drains offer both automatic purging and on-demand control. If downstream lubrication is ever needed, the matching GAFC400-15 combination adds a lubricator. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa regulated top, which is ample for stable operation.
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 GAFR400C15LN FAQ
The GAFR400C15LN is a filter & regulator with a 1/2in port, a pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Its proof pressure is 1.5 MPa (215 psi), and it operates from -5 to 70 C. The unit has a 100 cc metal drain bowl and weighs 880 g.
The 'L' type is designed for circuits that only need up to 0.4 MPa, offering finer adjustment in that lower band. The 'N' code means no gauge is supplied, so you must add one via the 1/4in gauge connection to read the outlet pressure. This configuration suits applications where a gauge is mounted remotely or not required.
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