The AirTAC GFR40015MLF3WTK AirTAC Filter Regulator NPT1/2, 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR40015MLF3WTK is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size 400 unit with a 1/2 in NPT port, the finer 5 um filter element (code W), a manual drain on the polycarbonate bowl, the low-pressure regulator type, an embedded square gauge with bar scale, a reverse/check valve fitted, and the mounting bracket included.
It is a genuine AirTAC part. The G-series filter-regulator line spans sizes 200, 300, 400 and 600, with PT as the standard thread and G or NPT as order options, drain choices of differential-pressure, automatic or manual, 40 um standard or 5 um filtration, square or round gauges with MPa, psi or bar scales, and bracket options. Flow is published as curves rather than a single rated figure, so we confirm datasheet figures on request.
| Model | GFR40015MLF3WTK AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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) |
Feeding spray guns on a finishing line, where the low-pressure regulator type sets a gentle working pressure and the 5 um element keeps oil-free, dry air reaching the nozzle.
Supplying pneumatic clamps on a CNC fixture table, with the regulator holding steady downstream pressure and the reverse/check valve helping hold the set point if upstream supply dips.
Conditioning air to cylinders and diverters on a carton packaging conveyor, filtering out water and particulate before it reaches the valves and setting the line pressure with the bar-scale gauge.
Size 400 with a 1/2 in port suits lines whose air demand sits in that band; step up or down a size if your flow curve calls for it. This code has a manual drain, so the bowl must be bled by hand - choose the automatic (A) or differential-pressure (blank) drain variant if manual bleeding is impractical at the mounting point. The 5 um element (W) is the finer grade; 40 um is the standard alternative. The embedded square gauge on this code reads in bar, with MPa and psi scales orderable. Thread is NPT here; PT is the standard and G is also orderable. Bracket included, low-pressure regulator type, reverse/check valve fitted.
Flow is published as curves, not a single rating - ask us to confirm sizing against the datasheet 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 this series as curves, not a single rated figure, so we do not quote a flow number here. Send us your air demand and line pressure and we will confirm sizing against the datasheet on request.
This code carries M for a manual drain, so the bowl must be bled by hand at intervals. If the unit will be mounted where regular bleeding is impractical, order the automatic (A) or differential-pressure (blank) drain variant of the same GFR400 size instead.
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.