Airtac GAFR Adjustable Filter Regulator GAFR400C15SJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15SJNK 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 GAFR400C15SJNK
The GAFR400C15SJNK is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. This model uses a 1/2in port, a metal bowl, and a 40 um element, with a working range of 0.15-0.9 MPa (20-130 psi).
Its diversion structure spins the air to separate liquid water and solid particles into the 100 cc drain bowl, while the balanced, self-locking regulator holds the set pressure steady. At 880 g, this unit is a substantial component that needs proper panel or frame mounting rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR400C15SJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15SJNK |
|---|---|
| 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 GAFR400C15SJNK
| 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. |
| 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 GAFC400-15 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 GAFR400C15SJNK Is Used
Machine tool air supply
Feed a precision machining center's pneumatic controls with clean, regulated air at a steady 0.15-0.9 MPa, using the 40 um element to protect sensitive valves.
Assembly line stations
Supply multiple workstations on an assembly line with a consistent 1/2in air feed, relying on the 100 cc bowl to collect condensate between maintenance rounds.
Test rig instrumentation
Provide stable pressure to a test bench's air circuits where the balanced regulator holds the setpoint as shop supply fluctuates, with the metal bowl standing up to frequent handling.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15SJNK the Right Air-Prep Unit?
Choose the GAFR400 body for medium-flow lines that need a 1/2in port, stepping up from the GAFR300's 3/8in maximum when you need more capacity. The metal bowl suits demanding environments where impact resistance is a concern, though you should confirm compatibility for aggressive surroundings. This unit ships with both semi-auto and manual drains, giving you flexibility for scheduled or manual condensate removal. The standard pressure type covers 0.15-0.9 MPa, and the 40 um element handles general-purpose filtration. No bracket is included (J), so plan for panel mounting or use an existing bracket, and no gauge is fitted, so the 1/4in gauge connection is ready if you add one later. The reverse-flow (reflux) valve is attached as an ordering difference, and the PT thread uses an MPa/psi gauge scale. If your line needs oil downstream, order the matching GAFC400-15 combination instead. Note that the 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan your inlet pressure accordingly.
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 GAFR400C15SJNK FAQ
The GAFR400C15SJNK operates from 0.15-0.9 MPa (20-130 psi) with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 100 cc drain bowl and weighs 880 g, with a 1/2in port and a 40 um element.
The J code means the mounting bracket is omitted, so you can use an existing bracket or panel-mount the unit. The N code means no gauge is supplied, but the 1/4in gauge connection is present if you want to add one. This lets you customize the setup for your specific installation.
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