Airtac GAFR Adjustable Filter Regulator GAFR400C15LK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15LK 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 gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15LK
The GAFR400C15LK is a filter and pressure regulator combined into a single body, eliminating the need for separate components. This 1/2in unit filters incoming air through a diversion structure that spins out liquid water and solid particles, then delivers a steady outlet pressure via its balanced regulator mechanism. The metal bowl holds 100 cc of condensate, and the unit weighs 880 g, placing it in the mid-size class for machine-level air preparation.
This lower-pressure model regulates from 0.15 to 0.4 MPa (20-58 psi), with a 40 um filter element. The circular gauge with MPa/psi scale is fitted, and the mounting bracket is included. A reverse-flow (reflux) valve is attached per the K code. The pressed-in self-locking knob resists set-pressure drift from vibration, keeping the outlet stable.
Airtac GAFR Adjustable Filter Regulator GAFR400C15LK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15LK |
|---|---|
| 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. 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 GAFR400C15LK
| 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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR400C15LK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require a stable, lower supply pressure. The balanced regulator holds the setpoint as line pressure fluctuates, protecting sensitive pilot stages.
Machine tool coolant lines
Supply a consistent 0.3 MPa to air-operated coolant pumps on a CNC lathe. The 100 cc metal bowl captures water and scale from the compressor, and the manual drain gives operators control.
Test bench air supply
Provide a clean, regulated air source for a laboratory test fixture. The 40 um element removes particulates, while the lower pressure range suits delicate measurement instruments.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15LK the Right Air-Prep Unit?
Choose this GAFR400 for 1/2in piping where a lower regulated pressure of 0.15-0.4 MPa (20-58 psi) is sufficient. The metal bowl (C) suits demanding environments, and the semi-auto plus manual drain handles condensate without power. The included bracket simplifies panel mounting, while the 40 um element handles general workshop air. The PT thread with MPa/psi gauge scale matches standard regional fittings. If the line needs oil downstream, order the matching GAFC400-15 combination instead. Note that 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 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 GAFR400C15LK FAQ
The GAFR400C15LK is a filter & regulator with a 1/2in port. It regulates from 0.15 to 0.4 MPa (20-58 psi), with a maximum supply pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Operating temperature is -5 to 70 C. The metal drain bowl holds 100 cc, and the unit weighs 880 g. It has a 40 um element and a fitted gauge.
The K indicates a reverse-flow (reflux) valve is fitted to the GAFR400C15LK. This is an ordering difference from models without the K code. The valve is drawn as a separate pneumatic symbol in the catalogue; its detailed function is covered in a separate section. For this unit, it is simply included as specified.
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