Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK 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
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK
The GAFR400C10ALJNK is a filter and regulator combined into a single body, with the filtering stage and pressure control sharing one housing. It handles a 3/8" port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um element. The metal bowl holds 100 cc of condensate, and the unit weighs 880 g, making it a substantial component for a machine line.
This model ships with an automatic drain and a reverse-flow (reflux) valve fitted, but no gauge and no mounting bracket. The balanced regulator mechanism holds the outlet steady as supply pressure varies, while the diversion structure spins the air to separate liquid water and solid particles into the bowl. It does not lubricate; if oil is needed downstream, the matching GAFC400-10 combination adds that function.
Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK |
|---|---|
| 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 | 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 | 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 GAFR400C10ALJNK
| 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". |
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| (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 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 GAFR400C10ALJNK Is Used
Precision Fixture Clamping
Feed a 3/8" line to a precision clamping fixture where a stable 0.15-0.4 MPa (20-58 psi) output protects delicate workpieces from over-force. The automatic drain keeps the 100 cc metal bowl clear during long production runs.
Machine Tool Coolant Valve
Supply a machine tool's coolant valve with regulated air in the lower pressure band, ensuring the valve actuator sees a consistent signal. The 880 g body with metal bowl suits a fixed installation on the machine frame.
Laboratory Air Bench
Provide a lab bench with filtered air at 0.15-0.4 MPa (20-58 psi) for pneumatic instruments that cannot tolerate higher pressures. The 40 um element traps particles, and the automatic drain reduces maintenance in a busy lab.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJNK the Right Air-Prep Unit?
Choose this GAFR400 for a 3/8" line that needs regulated air at 0.15-0.4 MPa (20-58 psi), where the lower pressure ceiling suits delicate equipment. The metal bowl (C) is a build choice for the environment, and the automatic drain (A) handles unattended operation or wet lines. The J code means no bracket is included, so plan for panel mounting or an existing frame; the N code means no gauge is supplied, and the 1/4" gauge connection is there if you add one later. The 40 um element is the standard grade, and the PT thread matches the MPa/psi gauge scale. The K code indicates the reverse-flow valve is fitted, an ordering difference only. With a 1.0 MPa max supply, this leaves about 0.6 MPa above the 0.4 MPa top of the range, so the regulator has ample inlet pressure to work with.
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 GAFR400C10ALJNK FAQ
This filter & regulator has a 3/8" port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 100 cc drain bowl, and weighs 880 g. The element is 40 um, and it has an automatic drain.
The N code after the port means no gauge is supplied, so you cannot read the set pressure without adding one to the 1/4" gauge connection. The J code means the mounting bracket is omitted, which suits installations where the unit mounts to a panel or an existing frame rather than using the standard bracket.
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