Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK 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
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK
The GAFR300C15SNK is a genuine AirTAC filter & regulator that combines both functions in a single body, replacing a separate filter and regulator pair. This 1/2in port version handles standard pressures from 0.15 to 0.9 MPa (20-130 psi) with a 40 um element, and its metal bowl and semi-auto plus manual drains suit demanding shop-floor conditions.
The diversion structure spins incoming air to separate liquid water and solid particles into the 60 cc condensate bowl, while the balanced, self-locking regulator keeps the outlet steady as supply pressure varies. At 500 g, this unit needs a proper panel or frame mount rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK |
|---|---|
| Series | GAFR300 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 | 60 cc |
| Bracket | Included |
| Weight | 500 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 GAFR300 is 1/8" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK
| GAFR300 | GA300 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 08 = 1/4", 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). |
| (blank) | Mounting bracket included. |
| N | No pressure gauge; 1/8" 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 GAFC300-15 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 | GAFR300 · 1/2" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK Is Used
Machine tool air prep
Feed a single machining center's pneumatic controls with clean, regulated air at 0.15-0.9 MPa, using the 1/2in port to handle peak demand without pressure sag.
Assembly line stations
Mount this unit at each assembly station to protect downstream valves and actuators from water and particles, while the self-locking knob holds the set pressure despite line vibration.
Test bench supply
Provide a stable 0.4 MPa test pressure to fixtures and gauges, relying on the balanced regulator to maintain output as shop air pressure fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port applications that need a 3500 L/min flow envelope at 0.7 MPa inlet; step up to the GAFR400 for 7000 L/min at 0.7 MPa inlet if you need more capacity. The metal bowl (C) is a build choice with the same 1.0 MPa max and -5 to 70 C rating as PC or nylon, so confirm compatibility for aggressive surroundings. This model ships with the mounting bracket, a 40 um element, PT threads, and a reverse-flow (reflux) valve fitted as an ordering difference; no gauge is supplied, but the 1/8in gauge connection is ready for one. Semi-auto plus manual drains are both fitted for flexible condensate removal. If the line needs oil downstream, order the matching GAFC300-15 combination instead. Remember that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range.
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 60 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 500 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 GAFC300-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300C15SNK FAQ
This filter & regulator has a 1/2in port, working pressure range of 0.15-0.9 MPa (20-130 psi), maximum pressure of 1.0 MPa (145 psi), proof pressure of 1.5 MPa (215 psi), temperature range of -5 to 70 C, 60 cc drain bowl, and weighs 500 g. It uses a 40 um element, has a metal bowl, semi-auto plus manual drains, and includes a mounting bracket.
The K code indicates the reverse-flow valve is fitted as an ordering difference. The catalogue defers its function to a separate page, so it is specified for applications requiring this option. For lubrication needs, note this unit does not add oil; use the GAFC300-15 combination instead.
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