The AirTAC GFR40010ALNWT AirTAC Filter Regulator NPT3/8 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 PT3/8" 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 GFR40010ALNWT is a size 400 GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is fitted with a 5 um filter element (code W), an automatic drain that ejects collected condensate without manual attention, and the low-pressure regulator type for applications that work at reduced set pressures. The 3/8 in NPT ports suit mid-size supply lines, and a mounting bracket is included. No gauge is fitted (code N), so add a separate gauge if a local pressure readout is needed.
This is a genuine AirTAC part. The GFR400 series is one of four sizes (200, 300, 400, 600) with port options from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, and gauge or no-gauge variants. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures against your application before ordering.
| Model | GFR40010ALNWT AirTAC Filter Regulator NPT3/8 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (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 | Not fitted |
| Reflux valve | Not fitted |
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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (blank) | No reverse-flow valve (the default). |
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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds and regulates the air to clamp cylinders on a CNC fixture line, where the 5 um element protects directional valves from water and fine particles and the low-pressure type suits reduced clamping pressures.
Placed ahead of spray guns on a finishing line, it strips water and 5 um-scale particulates that would otherwise blemish the finish, while the automatic drain handles condensate without daily attention.
Regulates and filters the supply to diverters, pushers and stop cylinders on a packaging conveyor, with the included bracket allowing panel or frame mounting next to the machine's air drop.
Size 400 with 3/8 in NPT ports sits in the middle of the GFR range: step up to size 600 or down to 300/200 depending on the flow your line needs - we can check the published flow curves against your demand if you send the figures. Choose the 5 um element (this model) when downstream equipment such as valves, cylinders or instruments needs finer filtration than the 40 um standard element provides; choose 40 um for general shop-air protection.
The automatic drain on this unit discharges condensate by itself, which suits unmanned or hard-to-reach installations; manual and differential-pressure drain variants exist if you prefer operator-controlled or demand-based draining. This is the low-pressure regulator type - confirm its adjustment range with us before ordering if your set point is critical. No gauge is fitted; gauge variants with MPa, psi or bar scales are available in the series. PT is the standard thread, with G and NPT as catalogue options, and a mounting bracket is included.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back 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 number, so we do not quote a figure here. Send us your line pressure and required air consumption and we will confirm the flow and datasheet figures for this exact model on request before you order.
The N in the code means no gauge is fitted; gauge variants with square or round dials in MPa, psi or bar scales are available in the GFR400 series. The W in the code is the 5 um filter element, one grade finer than the 40 um standard element, for better protection of downstream valves, cylinders and instruments.
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.