Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/2"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN
The GAFR400C15SJN is a filter & regulator in one body: it spins incoming air to separate liquid water and trap solid particles, then a balanced regulator holds a steady outlet pressure as supply varies. This 1/2in unit works in the 0.15-0.9 MPa (20-130 psi) range with a 40 um element, and has no lubricator - it only filters and regulates.
Its metal bowl holds 100 cc of condensate, and the 880 g body needs a proper panel or frame mount rather than support from the tubing. The pressed-in self-locking knob resists set-pressure drift from vibration, keeping the outlet stable in industrial environments.
Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 GAFR400C15SJN
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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 GAFR400C15SJN Is Used
Machine tool circuits
Feed a 1/2in line to a CNC machine's clamping system, where the 40 um element protects solenoid valves and the stable regulated pressure keeps clamping force consistent.
Assembly station headers
Mount this GAFR400 on a multi-station assembly bench to supply filtered air at a set pressure to multiple pneumatic tools, with the 100 cc bowl reducing drain frequency during shifts.
Test rig air supply
Use it on a test bench where you need clean, regulated air at a known pressure for fixture actuation, relying on the balanced regulator to hold the setpoint as shop pressure fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15SJN the Right Air-Prep Unit?
Choose the GAFR400 body for 1/2in ports and a 100 cc drain bowl, stepping up from the GAFR300's 60 cc bowl when you need longer intervals between draining. The metal bowl (C) suits demanding build environments, while the semi-auto plus manual drain gives you both automatic purging and a manual override. This J model omits the mounting bracket for panel-mount installations, and the N code means no gauge is supplied - the 1/4in gauge connection is ready if you add one later. The standard S type covers 0.15-0.9 MPa, and the 40 um element handles general shop air; choose the W option for 5 um filtration if you feed precision valves. With a 1.0 MPa max supply, you have about 0.1 MPa above the 0.9 MPa top of the regulated range, so plan your inlet pressure near 1.0 MPa for full output.
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 GAFR400C15SJN FAQ
This filter & regulator has a 1/2in port, working pressure range of 0.15-0.9 MPa (20-130 psi), max pressure of 1.0 MPa (145 psi), proof pressure of 1.5 MPa (215 psi), and operates from -5 to 70 C. The metal drain bowl holds 100 cc, the unit weighs 880 g, and it uses a 40 um element with a 1/4in gauge connection.
The N code after the port means no gauge is fitted - you can add one later via the 1/4in connection if you need to read the set pressure. The J code omits the mounting bracket, which suits panel-mount installations or setups that already have a bracket in place. Both options reduce initial cost when you don't need those components.
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