The AirTAC GFR40015ALJNWT AirTAC Filter Regulator 1/2 in NPT, 5 um 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 GFR40015ALJNWT is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is built around a 1/2 in NPT port and carries the W-grade 5 um filter element for finer filtration than the standard 40 um element. The automatic drain expels collected condensate on its own, so the polycarbonate bowl does not depend on someone opening a manual drain valve. It is a low-pressure (L) type regulator, it is supplied without a pressure gauge and without a mounting bracket, and no reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family 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 drain, 40 um or 5 um filtration, gauge options and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40015ALJNWT AirTAC Filter Regulator 1/2 in NPT, 5 um |
|---|---|
| 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 a CNC fixture line, this unit filters cutting-air moisture and fine particles at 5 um and holds a steady low clamping pressure at each 1/2 in NPT drop, with the automatic drain keeping the bowl clear between cycles.
Instrument and sample-handling skids often run at reduced line pressure and need clean air: the low-pressure regulator type, 5 um element and self-draining bowl make this a fit at the skid's 1/2 in NPT supply point.
On a cartoning or wrapping machine, this filter regulator cleans the plant air feeding cylinders and actuators and regulates it to the machine's working pressure, with automatic condensate draining during continuous shifts.
Size and port drive the choice: the 400 size with its 1/2 in NPT port suits lines that need more flow than a 200 or 300 unit, but the right step depends on your demand, so have us check the flow curve against your application. Drain type matters in duty terms: the automatic drain on this model suits unattended or hard-to-reach installations, while manual and differential-pressure drains are the other catalogue options. The 5 um element (code W) is the finer choice versus the standard 40 um element where downstream equipment needs cleaner air. Gauge (square embedded or external round, with MPa, psi or bar scale), PT versus G/NPT thread, and bracket inclusion are all decodable options you can specify. Flow is published as curves, not a single rating, so ask us to confirm sizing before you order.
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 GFR series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your line pressure and air demand and we will confirm the flow from the datasheet curve for this 400-size, 1/2 in NPT unit before you order.
The A in the code means the bowl drains collected condensate automatically instead of relying on a manual drain valve, which suits unattended installations. The W code means the 5 um filter element is fitted rather than the standard 40 um element, giving finer particulate and water removal downstream. This unit is also the low-pressure (L) regulator type and comes without a gauge or bracket.
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.