The AirTAC GFR40015ALJF2WTK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 AirTAC GFR40015ALJF2WTK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is built around a 1/2 in NPT port and carries a 5 um filter element (code W) for finer filtration than the standard 40 um grade. The automatic drain (code A) ejects collected condensate without anyone opening the bowl, which suits installations that are not checked daily. The regulator is the low-pressure type (code L), and the fitted square gauge (code F2) reads in psi. A reverse/check valve (code K) is fitted, and this configuration comes without a mounting bracket (code J).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge scale options, and PT, G or NPT threads. Maximum working pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The 400-size bowl is polycarbonate (PC). Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40015ALJF2WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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, psi 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. |
| 2 | Gauge scale: psi. 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) |
Fixture clamps and swing clamps on a CNC machining cell that hold workpieces at reduced line pressure get clean, regulated air from one compact body, with the 5 um element protecting the clamp seals and the psi gauge letting the setter read clamping pressure directly.
A cartoning or wrapping line running through shifts benefits from the automatic drain, which clears condensate from the bowl without an operator, while the regulator holds a steady low supply pressure to the machine's air cylinders and the check valve holds downstream pressure if supply dips.
Sorting and conveyor systems that use air jets and small actuators need particulate-free air so nozzles stay clear; this unit filters to 5 um, regulates the blower circuit at low pressure, and the 1/2 in port serves the higher air demand of a longer conveyor run.
Size and port are the first decision: the 400 size steps up to 1/2 in ports and suits lines that need more air than the 200/300 sizes deliver, but the right step depends on the flow your circuit actually draws - flow is published as curves, not a single rating, so let us confirm sizing against your application before you order. This unit is already configured with the 5 um element (W) instead of the standard 40 um, the automatic drain (A) instead of manual or differential-pressure, the low-pressure regulator type (L), a square gauge reading psi (F2), and a reverse/check valve (K). The thread is NPT (T); PT is the catalogue standard and G (BSPP) is also available to order. If you need a mounting bracket, the J (no bracket) code can be dropped to get one. The exact regulation range of the low-pressure type is not published in our sheet - we will confirm it on request.
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 flow for the GFR400 series as curves, not as a single rated number, so there is no one l/min or SCFM figure we can honestly quote. Send us your application details and we will confirm the datasheet flow figures and check the sizing for you on request.
The A in the code means the bowl drains itself: collected condensate is ejected automatically as pressure changes, so the unit suits installations that are not checked every day - no manual draining routine. The W code sets the filter element at 5 um instead of the standard 40 um, giving finer protection for sensitive downstream components. If you prefer the standard 40 um grade or a manual drain, those are separate order codes in the same series.
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.