The AirTAC GFR400-15ALJF3WTK AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR400-15ALJF3WTK is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single 400-size body with a 1/2 in NPT port. This configuration carries the 5 um filter element (code W) for finer air cleaning than the standard 40 um grade, an automatic drain that ejects collected condensate without manual attention, a low-pressure regulator type, an embedded square gauge scaled in bar, and a reverse/check valve fitted. The polycarbonate bowl lets you see the condensate level at a glance, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR series is published in sizes 200, 300, 400 and 600 with matching port sizes, a choice of PT (standard), G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um filtration, and standard or low-pressure regulator types. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures against your application before ordering.
| Model | GFR400-15ALJF3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds a fixture-clamping circuit that holds workpieces at reduced pressure, with the low-pressure regulator type setting the hold force and the 5 um element keeping the clamping cylinders clean.
Conditions the bench air supply where finer 5 um filtration and a bar-scaled gauge are wanted, and the automatic drain keeps the bowl clear between test runs.
Sits at the machine drop to filter and regulate air to actuators and vacuum-assist circuits, with the reverse/check valve holding the set pressure if the upstream supply dips.
Start with the port step: the 400 size with a 1/2 in port sits in the upper half of the GFR range, so match it to your line size and required air demand - and because flow is published as curves rather than one rating, ask us to confirm the sizing before you order. Choose the drain next: automatic (this unit) suits unattended duty, manual suits periodic checks, and differential-pressure is the catalogue default. Choose 5 um filtration (as here) when downstream equipment needs finer air than the standard 40 um grade. The embedded square gauge in bar is standard; an external round gauge in MPa, psi or bar is an option. PT is the standard thread, with G and NPT available to order - this code is the NPT variant. Brackets are optional; this code omits one.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves, not as a single rated figure, so we do not quote a flow number. Send us your air demand and line conditions and we will confirm the datasheet curve and the right size for your application on request.
The A in the code fits an automatic drain, which expels collected condensate from the bowl without anyone opening it - useful on unattended lines. The L sets the low-pressure regulator type; its exact adjustment range is not published in the sheet we work from, so confirm the range with us against your set pressure before ordering.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.