The AirTAC Airtac GAFC Air Service Unit GAFC300N15LWK is a genuine two-piece F.R.L. combination — a GA-series filter & regulator and a lubricator pre-assembled on one T-shape bracket with quick mounting clamps. It has 1/2" ports, a 5 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi).
This AirTAC GAFC300N15LWK is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator on a shared T-bracket. Air enters the 1/2in port, gets filtered by the 5 um element and regulated down to the 0.15-0.4 MPa (20-58 psi) lower-pressure band, then the lubricator adds a controlled oil mist as the final step. The nylon bowl holds 60 cc of condensate while the separate oil bowl stores 98 cc, and the whole unit weighs 1020 g.
The lower-pressure range suits applications that never need more than 0.4 MPa, but the 1.0 MPa (145 psi) max supply leaves about 0.6 MPa of headroom above the top setting. The circular gauge reads in MPa and psi on the PT thread, and the reverse-flow valve is fitted. With the 5 um element, this unit traps finer particles than the standard 40 um grade, making it a fit for precision circuits that still require lubrication.
| Model | Airtac GAFC Air Service Unit GAFC300N15LWK |
|---|---|
| Series | GAFC300 F.R.L. combination |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Nylon |
| 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 |
| Capacity of oil bowl | 98 cc |
| Recommended lubricant | ISO VG 32 or equivalent |
| Weight | 1020 g |
Specifications follow the official AirTAC GAFC catalogue (pages 219-220). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
| GAFC300 | GA300 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. 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. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
Constituent units, orderable separately as spares: GAFR300-15 filter & regulator, GAL300-15 lubricator — both share this body and port. A GAFC has two units, not three: the filter and the regulator are one body.
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 | GAFC300 · 1/2" · curve to 3500 L/min |
|---|---|
| One size down | GAFC200 |
| One size up | GAFC400 (curve to 6000 L/min) |
| Build order | Filter & regulator → bracket → lubricator |
Feed a small drilling spindle that requires clean, regulated air at 0.3 MPa with a fine oil mist for the chuck mechanism. The 5 um element protects the spindle bearings from abrasive particles.
Supply a labeling head that needs consistent low pressure around 0.35 MPa to apply labels without crushing product. The lower-pressure range gives finer adjustment in the 0.15-0.4 MPa band.
Operate a small pneumatic press on a workbench where operators need a visible gauge to set the force. The 1/2in port connects easily to a shop air line, and the 98 cc oil bowl keeps the cylinder lubricated through long shifts.
Choose this GAFC300N15LWK when your line needs 1/2in ports and a regulated output capped at 0.4 MPa (20-58 psi). The nylon bowl is a material choice, not a performance upgrade - the common specification of 1.0 MPa max and -5 to 70 C applies regardless, so confirm nylon suits your surroundings. The semi-auto drain dumps condensate on pressure drops while the manual drain gives on-demand control, and the 5 um element catches finer particles than the standard 40 um grade at the cost of more frequent element service. The PT thread pairs with the MPa/psi gauge scale, and the reverse-flow valve is fitted as an ordering difference. The two units are orderable separately as the GAFR300-15 filter-regulator and the GAL300-15 lubricator. With a 60 cc drain bowl, this unit holds about 60% of the condensate capacity of the GAFC400's 100 cc bowl, so plan more frequent checks on wet supply lines.
Quick checklist
The lubricator adds an oil mist downstream of the regulator. If any part of the line must stay oil-free, use a plain GAFR300-15 filter-regulator on that branch instead of the full combination.
This lower-pressure unit operates at 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). It works in temperatures from -5 to 70 C and needs ISO VG 32 lubricant. The drain bowl holds 60 cc and the oil bowl holds 98 cc, with a total weight of 1020 g. The 5 um element filters the air before regulation.
The K in the code GAFC300N15LWK indicates the reverse-flow (reflux) valve is fitted. The catalogue shows this valve as a separate pneumatic symbol on the unit. It is an ordering difference from models without the K code, and its detailed function is covered on the catalogue page referenced for that symbol.
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