The AirTAC GFR40015ALF1WTK AirTAC Filter Regulator NPT1/2 5um 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 GFR40015ALF1WTK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is fitted with a 1/2 in NPT port, a fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator type for circuits that run below standard setpoints. A square pressure gauge with MPa scale is included, a reverse/check valve is fitted, and a mounting bracket comes in the box. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR range, which 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 drains, 40 um or 5 um elements, standard or low-pressure regulation, gauge and thread options, and an optional reverse/check valve. Rated inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR40015ALF1WTK AirTAC Filter Regulator NPT1/2 5um |
|---|---|
| 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, 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. |
| (blank) | Mounting bracket included. |
| (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. |
| 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) |
Feeds filtered, regulated air to the cylinders and grippers on a cartoning or wrapping line, with the automatic drain keeping condensate out of the valves during long production runs.
Supplies a laboratory or QA test rig that runs at reduced pressure, where the low-pressure regulator type and 5 um element protect sensitive gauges and instrumentation.
Conditions the air feeding conveyor stoppers, diverters and blow-off nozzles, with the check valve holding the downstream circuit if the upstream supply dips.
Choose the GFR size by the port and flow your line needs: this 400-size unit carries a 1/2 in NPT port, one step up from 3/8 in and suited to larger air consumers. Drain is the real day-to-day choice: automatic (this unit) empties the bowl on its own, manual needs an operator, and the differential-pressure default triggers on a set pressure drop. The 5 um element (code W) suits instruments and finer pneumatic components; the 40 um standard element covers general protection. Gauge scale can be MPa, psi or bar, and the thread can be ordered as PT (standard), G (BSPP) or NPT as here. Flow is published as curves, not a single rating, so send us your application details and we will confirm sizing against the datasheet before you order.
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 as curves, not as a single rated number, so there is no honest one-line figure we can quote. Tell us your line pressure and the air consumption of the equipment you are feeding, and we will confirm the sizing from the datasheet curves on request before you order.
The A in the code sets the automatic drain: the bowl empties collected condensate by itself instead of waiting for a manual bleed, which suits unattended lines. The W sets the 5 um filter element, one grade finer than the 40 um standard, for downstream components that need cleaner air. Both are order-time choices across the GFR range.
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.