
The AirTAC Airtac GAC F.R.L. Unit GAC400N15LNWK 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 - 0.4 MPa (20 - 58 psi).
Delivering cleaned, regulated and lubricated air for pneumatic systems, this AirTAC F.R.L. combination integrates a filter, regulator and lubricator on a single L-shape bracket. The 1/2in ported body operates within the lower pressure range of 0.15-0.4 MPa (20-58 psi) and utilizes a 5 um element to capture fine particulates for sensitive downstream valves. A reverse-flow valve is fitted, shown as a separate pneumatic symbol in the catalogue.
Weighing 2390 g, the assembly features a nylon bowl and omits the pressure gauge, leaving a 1/4in connection for adding one if required. The build sequence passes air through the filter first, then the regulator, and finally the lubricator, ensuring oil mist is added downstream so the regulator seat never fouls. Condensate is managed by a paired semi-auto and manual drain system, while the 100 cc drain bowl and 185 cc oil reservoir dictate the maintenance interval.
| Model | Airtac GAC F.R.L. Unit GAC400N15LNWK |
|---|---|
| Series | GAC400 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 | 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. No gauge is supplied with this model — the gauge connection on a GAC400 is 1/4" if you add one.
| GAC400 | GA400 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 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). |
| N | No pressure gauge; 1/4" gauge connection. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| 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 |
Feeds instrument air to sensitive solenoid banks using the 5 um element to prevent seat contamination in tight-tolerance directional control valves.
Supplies a steady 0.15-0.4 MPa output for delicate pick-and-place actuators on carton sealing lines where high pressure would crush lightweight materials.
Conditions branch lines feeding multiple smaller cylinders in a workshop, utilizing the 100 cc condensate bowl to capture moisture from intermittent duty cycles.
Choose this 1/2in ported unit for medium-scale air preparation duties, stepping up from the GAC300 which offers a 3000 L/min plotted flow envelope at 0.7 MPa inlet compared to this body's 6000 L/min curve. The nylon bowl suits standard -5 to 70 C environments, and buyers needing unattended condensate removal should select an automatic drain variant instead of this semi-auto and manual pair. Because the N after the port means no gauge is supplied, operators must add one to the 1/4in connection to read the set pressure. If the machine requires oil-free output downstream, omit the lubricator and choose a dedicated filter-regulator. Replacement spares follow the body-port suffix exactly: GAF400-15, GAR400-15 and GAL400-15. The lower pressure type caps output at 0.4 MPa, which is 44% of the standard 0.9 MPa ceiling.
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.
This lower-pressure unit regulates from 0.15-0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It operates between -5 to 70 C, weighs 2390 g, and features a 100 cc drain bowl alongside a 185 cc oil bowl. The recommended lubricant is ISO VG 32.
The N in the code indicates no gauge is supplied, leaving a 1/4in port for installing one later so operators can monitor the 0.15-0.4 MPa range. The K denotes a reverse-flow valve fitted to the assembly, which the catalogue details as a separate pneumatic symbol on its own page.
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