The AirTAC GFR40015ALF3WTK 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 GFR40015ALF3WTK is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This size 400 unit is specified with a 1/2 in NPT port, a 5 um filter element (code W) for finer particle capture than the standard 40 um grade, and an automatic drain that expels collected condensate from the polycarbonate bowl without manual attention. It is a low-pressure type (code L) for circuits that run below standard regulator settings, and the fitted square gauge reads in bar.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, PT, G or NPT threads, and optional reverse/check valve. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR40015ALF3WTK 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 | 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. |
| (blank) | Mounting bracket included. |
| (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) |
Point-of-use conditioning for a packaging line's pneumatic actuators: the 5 um element protects valves and cylinders from particles and water while the regulator holds a steady low supply pressure to the machine's air manifold.
Mounted at the feed end of a conveyor sorting section, this unit filters the shop air feeding diverters, stoppers and gate cylinders and regulates it to the low setting those stations are set up for, with the bar gauge giving a local reading.
Supply conditioning for bench-top test rigs and laboratory automation, where the finer 5 um grade and a low, stable regulated pressure protect sensitive pilot valves and instrumentation downstream, and the automatic drain keeps the bowl clear during unattended runs.
Size 400 with a 1/2 in NPT port suits lines with higher air demand; step up to size 600 or down to 300/200 as your circuit requires. Choose the automatic drain fitted here when the unit sits where condensate should be removed without operator attention; manual and differential-pressure drains are the alternatives in the family. The 5 um element (W code) is the finer option over the standard 40 um grade. The embedded square gauge reads in bar; external round gauges with MPa, psi or bar scales are optional. PT is the standard thread and G or NPT are order options - this unit is specified NPT. A mounting bracket is included, and the K code means a reverse/check valve is fitted.
Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. The low-pressure type's exact regulation range is not published in the standard table, so we will confirm it on request as well.
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 this 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 and full datasheet figures for this exact model on request before you order.
The A in the code means the polycarbonate bowl drains collected condensate automatically instead of relying on manual draining or a differential-pressure trigger - useful where the unit is not checked daily. The L means it is the low-pressure type of regulator; its exact adjustment range is not published in the standard table, so we confirm it on request.
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.