The AirTAC GFR40015LJF3WTK 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 differential-pressure 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 GFR40015LJF3WTK is a size 400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the low-pressure type (code L) with a fine 5 um filter element (code W), a differential-pressure drain on the PC bowl, an embedded square gauge scaled in bar, and a reverse/check valve (code K) fitted. It is supplied without a mounting bracket (code J) and comes with NPT1/2 ports.
This is a genuine AirTAC part from the GFR range, which spans sizes 200 to 600 with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The exact regulation range of the low-pressure type is not published in the catalogue, and flow is published as curves rather than a single rating, so we confirm both from the datasheet on request.
| Model | GFR40015LJF3WTK 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure 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) |
Regulates and cleans the air feeding pneumatic clamps and hold-down fixtures on an assembly line, where the circuit is designed to run at reduced pressure and the check valve holds the clamp position if supply pressure drops.
Sits at the drop to a packaging or cartoning machine, filtering water and fine particles out of the plant air supply and regulating it to the pressure the machine's cylinders and actuators were set up for.
Conditions the air feeding spray guns and low-pressure finishing equipment in a paint or coating booth, using the 5 um element to catch fine contamination that would otherwise mark the finish.
Size 400 with 1/2 in NPT ports suits lines with substantial air demand; step up or down through the 200/300/400/600 range to match your piping and flow. This unit is the low-pressure type, chosen where the working circuit sits well below standard regulator settings - its exact range is not published, so confirm it against your setpoint with us before ordering. The 5 um element (code W) is the finer option over the 40 um standard element; pick it where downstream valves and instruments need cleaner air. Drain is differential-pressure (automatic discharge as the pressure differential builds); automatic and manual drains are available on other codes if you prefer. The square gauge is scaled in bar here, with MPa and psi scales available on other codes, and the fitted check valve holds downstream pressure if upstream supply is lost. PT is the standard thread; G and NPT are order options specified in the code. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 figure, so we do not quote a number here. Tell us your application and we will confirm the flow from the datasheet curves, along with the regulation range of the low-pressure type, on request.
K means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply is interrupted. The drain is differential-pressure type: condensate collected in the PC bowl discharges automatically as the pressure differential builds, with no manual draining needed under normal operation.
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.