The AirTAC GFR40015ALJF3WT 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 AirTAC GFR40015ALJF3WT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is threaded 1/2 in NPT, carries the fine 5 um filter element (code W), drains condensate automatically, and is the low-pressure regulator type. A square pressure gauge scaled in bar is fitted, the polycarbonate bowl suits this size, and no mounting bracket is included with this configuration.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the family you can choose manual, automatic or differential-pressure drains, a 40 um standard or 5 um fine element, gauge style and scale, G, NPT or PT threads, and bracket options. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR40015ALJF3WT 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 | Not fitted |
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. |
| (blank) | No reverse-flow valve (the default). |
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) |
On an assembly-machine press station, this unit filters the supply air down to 5 um and holds a low regulated pressure to the clamping cylinders, with the automatic drain clearing condensate between shifts.
Feeding positioners and pilot-operated process valves in a plant, the low-pressure regulator type and bar-scaled square gauge let technicians set and verify the delicate pilot pressure the actuators expect.
On a packaging line running diverters and gate cylinders, this 1/2 in filter regulator cleans the shop air, sheds accumulated water via the automatic drain, and keeps the actuation circuit at its set pressure.
Size 400 with a 1/2 in NPT port sits in the upper half of the GFR range, so step up or down through the 200/300/400/600 sizes against the flow your line needs. The automatic drain here empties the bowl without operator attention - choose manual drain if you prefer controlled, scheduled draining, or the differential-pressure default if that suits your maintenance pattern. The 5 um element (code W) is the finer choice over the 40 um standard where downstream valves and cylinders need cleaner air. The fitted square gauge reads in bar; external round gauges and MPa or psi scales are alternatives. G and NPT threads are order options beside the PT standard, and brackets can be added where this no-bracket configuration is not enough.
Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering - we will pull the datasheet for you.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 series as curves rather than a single rated number, so we do not quote a l/min or SCFM figure. Tell us your application and we will confirm the datasheet flow curves and check the sizing for you before you order.
The W code in the model sets the fine 5 um element instead of the 40 um standard, which suits circuits with sensitive valves; the A code sets the automatic drain, so condensate is expelled from the polycarbonate bowl without manual attention. Manual-drain and differential-pressure-drain versions of the same size are available if you prefer a different maintenance routine.
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.