Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ 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 gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ
The GAFR400C10LJ is a filter and pressure regulator combined in a single metal-bodied unit, with no lubricator section. It handles a 3/8in port and delivers a lower-pressure range of 0.15-0.4 MPa (20-58 psi) through a 40 um element, making it suitable for applications needing precise low-pressure control.
The metal bowl holds 100 cc of condensate, and the unit weighs 880 g, placing it in the mid-size class of the GAFR series. Its diversion structure spins incoming air to separate liquid water and solid particles, while the balanced regulator mechanism holds the outlet steady as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ |
|---|---|
| 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. 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 GAFR400C10LJ
| 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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR400C10LJ Is Used
Low-pressure assembly tools
Feed a precision tightening spindle or a delicate press that requires a stable 0.2-0.35 MPa supply, where the lower-pressure regulator prevents over-force.
Lab air benches
Supply filtered air at a controlled low pressure to a laboratory workbench feeding small pneumatic actuators or vacuum generators.
Paint spray regulation
Regulate atomizing air for a manual spray gun in a finishing booth, keeping the outlet within the 0.15-0.4 MPa band for consistent coating.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C10LJ the Right Air-Prep Unit?
Choose this GAFR400C10LJ when you need a 3/8in port with a lower-pressure range capped at 0.4 MPa (20-58 psi). The metal bowl (C) suits demanding environments, while the omitted bracket (J) is for panel-mount installations. The semi-auto and manual drains are both fitted, and the circular gauge shows MPa/psi. For finer filtration, select the W option for a 5 um element; if oil is needed downstream, order the matching GAFC400-10 combination instead. Note that 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range.
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 GAFR400C10LJ FAQ
The GAFR400C10LJ is a filter & regulator with a 3/8in port. The pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Operating temperature is -5 to 70 C. The drain bowl holds 100 cc and the unit weighs 880 g.
The L code sets the regulated range to 0.15-0.4 MPa (20-58 psi), which is about 44% of the standard type's ceiling. The J code means the mounting bracket is not included, so you must use an existing bracket or a panel mount. The metal bowl (C) is a build choice; confirm compatibility for aggressive surroundings.
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