The AirTAC Airtac GAC F.R.L. Combination Units GAC40015SWTK is a genuine three-unit F.R.L. combination — a filter, a pressure regulator and a lubricator pre-assembled on one bracket with quick mounting clamps. It has 1/2" ports, a 5 µm filter element and regulates 0.15 - 0.9 MPa (20 - 130 psi).
Air leaving this GAC40015SWTK has been filtered down to 5 um, held at a stable pressure anywhere between 0.15 and 0.9 MPa (20-130 psi), then enriched with an ISO VG 32 oil mist - because the three GA-series units arrive pre-plumbed in the order filter, regulator, lubricator on one L-shape bracket with quick clamps, there is no inter-unit tubing to leak and the oil is injected after the regulator so it never fouls the regulator seat.
The 1/2" NPT ports and 2390 g mass place this body in the mid-size class: mount it on a proper panel or frame rather than letting the tubing carry it, and note the lighter GAC300 weighs 1300 g if your duty is smaller. This build uses a PC bowl with both drains fitted - the semi-auto dumps condensate on each pressure drop while the manual lets an operator clear the 100 cc bowl on demand - plus a circular gauge reading psi/bar as the NPT thread dictates, and a reverse-flow (reflux) valve, which the catalogue draws as a separate pneumatic symbol with details on its own page.
| Model | Airtac GAC F.R.L. Combination Units GAC40015SWTK |
|---|---|
| Series | GAC400 F.R.L. combination |
| Port size | 1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| Bowl material | PC |
| 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 |
| Capacity of oil bowl | 185 cc |
| Recommended lubricant | ISO VG 32 or equivalent |
| Weight | 2390 g |
Specifications follow the official AirTAC GAC catalogue (pages 216-217). Air must not freeze in the unit. The fitted circular gauge reads in psi / bar, set by the NPT thread code.
| GAC400 | GA400 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. 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). |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| T | NPT thread; gauge scale psi / bar. |
| K | Reverse-flow (reflux) valve attached. |
Constituent units, orderable separately as spares: GAF400-15 filter, GAR400-15 regulator, GAL400-15 lubricator — all three share this body and port.
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 | GAC400 · 1/2" · curve to 6000 L/min |
|---|---|
| One size down | GAC300 |
| One size up | GAC500 (curve to 7000 L/min) |
| Build order | Filter → bracket → regulator → lubricator |
Feeding tool-clamp cylinders and air-blast nozzles on a machining centre, where the 5 um element protects the fine spools in the tool-change valve bank and the 1/2" ports keep up with burst demand.
Supplying carton-erector clamps and tape-head actuators on a packaging line, with the oil mist keeping cylinder seals and quick-exhaust valves lubricated through long shifts.
Running pop-up diverters, stoppers and gate cylinders along a distribution conveyor, where the 100 cc drain bowl and semi-auto drain cope with steady condensate from a busy compressor room.
Size the body by air demand: this GAC400 takes 1/2" ports and its catalogue curve is plotted to 6000 L/min at 0.7 MPa inlet, against 3000 L/min for the GAC300 and 7000 L/min for the GAC500 - read the curve at your real duty point, since it is a sizing envelope and not a rated flow. The W code selects the 5 um element instead of the standard 40 um, which suits precision valves and instrument take-offs but loads faster, so expect more frequent element service. The bowl here is PC; metal (C) and nylon (N) bowls exist for this body - confirm material compatibility for aggressive surroundings.
Drainage is the semi-auto plus manual pair; if the line runs unattended or the air is wet, the A-coded automatic-drain variant of this same unit is worth a look. This is the standard type regulating 0.15-0.9 MPa (20-130 psi) - a lower-pressure L version of the GAC400 exists if your machine will never need more than 0.4 MPa. Spares follow the body-port on all three units: order GAF400-15, GAR400-15 and GAL400-15 rather than replacing the whole assembly, and remember the lubricator adds oil mist downstream, so choose a filter-regulator instead if the line must stay oil-free. Moving up from a GAC300 to this GAC400 roughly doubles the plotted flow envelope - 6000 L/min versus the GAC300's 3000 L/min at 0.7 MPa inlet, a 2x step - so size up when demand grows.
Quick checklist
The lubricator adds an oil mist downstream of the regulator. If any part of the line must stay oil-free, use a filter-regulator instead of an F.R.L. combination on that branch.
As a standard-type unit it regulates 0.15-0.9 MPa (20-130 psi), with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It operates in -5 to 70 C and must not be allowed to freeze. The drain bowl holds 100 cc and the oil bowl 185 cc, the recommended lubricant is ISO VG 32 or equivalent, and the complete assembly weighs 2390 g.
It selects the 5 um filtering grade in place of the standard 40 um element. The finer grade traps much smaller particles, which protects precision valves and instrument-air take-offs, but it loads up faster, so plan more frequent element inspections. Replacement elements come with the GAF400-15 filter unit, ordered separately under the same body-port suffix.
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