The AirTAC GFR400-15ALJF1TK AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 40 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 GFR400-15ALJF1TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit has a 1/2 in NPT port, the standard 40 um filter element, and an automatic drain that expels collected condensate without manual attention. It is the low-pressure type, fitted with the embedded square gauge on an MPa scale, and includes a reverse/check valve. No mounting bracket is fitted.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with a choice of drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard; G and NPT as order options) and bracket. Flow and datasheet figures are published as curves rather than a single rating, so we confirm them for your application on request.
| Model | GFR400-15ALJF1TK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, MPa 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding spray guns in a paint finishing booth, where the low-pressure regulator holds a steady gun supply pressure and the automatic drain keeps water out of the finish.
Supplying filtered, regulated air to the cylinders and actuators on a cartoning or case-packing line, with the 40 um element protecting valves from particulate and condensate.
Regulating supply air to solenoid valves and small actuators across a weaving or spinning line, where the automatic drain handles moisture without daily manual blowdown.
Choose the size and port step against the air demand of the circuit: this unit is size 400 with a 1/2 in NPT port, one step above the 300 series. The automatic drain suits unattended installations where condensate must be expelled without operator rounds; manual and differential-pressure drains are available elsewhere in the series. The standard 40 um element covers general pneumatic protection, while the 5 um (W) grade is the finer option. The fitted square gauge reads in MPa; psi and bar scales and an external round gauge are alternatives. Thread is NPT here, with PT standard and G as order options. This code carries no bracket (J), so order one separately if panel or wall fixing is needed. As a low-pressure type, its adjustment range differs from the standard unit; we confirm the exact range from the datasheet on request. Because flow is published as curves rather than a single rating, 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 GFR series as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for this unit on request.
The A in the code selects the automatic drain: collected condensate is expelled from the PC bowl without manual attention, which suits unattended or hard-to-reach installations. Manual and differential-pressure drains are available as alternative 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.