The AirTAC Airtac GAFC Air Service Unit GAFC300N15LK 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 40 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi).
This GAFC300N15LK is a two-piece F.R.L. combination: a filter and regulator share one body, and a lubricator is mounted beside them on a T-bracket. It handles a 1/2in port and weighs 1020 g, placing it in the mid-range class where a proper panel or frame mount is needed rather than support from the tubing. The lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), and the 40 um element is the standard filtering grade.
The nylon bowl is specified by the N before the port code; the catalogue gives no impact or chemical data for it, so confirm it suits your surroundings. A circular gauge is fitted and reads in MPa/psi for the PT thread. The reverse-flow valve is included, and the semi-auto drain dumps condensate on each pressure drop while the manual drain works on demand.
| Model | Airtac GAFC Air Service Unit GAFC300N15LK |
|---|---|
| Series | GAFC300 F.R.L. combination |
| 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 | 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. |
| (blank) | Filtering grade 40 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 |
Set a lathe's air chuck to a stable 0.3 MPa using the lower-pressure regulator, with the gauge confirming the setpoint on the MPa/psi dial.
Feed a belt tensioning cylinder on a small assembly line, where the 1/2in port matches the manifold and the 60 cc drain bowl handles typical condensate.
Supply a measured oil mist to a slide way lubricator on a milling machine, with the 98 cc oil bowl reducing how often an operator tops it up.
Choose this GAFC300N15LK when your circuit needs a 1/2in port and a regulated ceiling of 0.4 MPa. The lower-pressure type is for machines that never need more than that; if the line might ever require higher pressure, the standard type is the correct part. The nylon bowl is a build choice, and the 40 um element suits general shop air; step to the 5 um element for finer filtration. The semi-auto and manual drains are both fitted, and the circular gauge with MPa/psi scale is standard for the PT thread. The reverse-flow valve is fitted, and the two units are orderable separately as GAFR300-15 and GAL300-15. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the regulated range.
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.
The working pressure range is 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 operates from -5 to 70 C and uses ISO VG 32 lubricant. The drain bowl holds 60 cc, the oil bowl holds 98 cc, and the unit weighs 1020 g.
The L in the code specifies the lower-pressure type, which tops out at 0.4 MPa instead of the standard 0.9 MPa. This suits applications that only need modest pressure, but if your machine may ever require more, the standard type is the safer choice.
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Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.