The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, 5 um, Auto Drain 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 GFR400-10 is a filter regulator: one body that first removes water and particulate from compressed air, then regulates downstream pressure. This configuration is the size 400 unit with a PT3/8 port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a fitted embedded square gauge scaled in psi. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the size 400 frame, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options include drain type (differential-pressure, automatic or manual), filter grade (40 um standard or 5 um), gauge scale (MPa, psi or bar), reverse/check valve, bracket and G or NPT thread. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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, psi scale |
| 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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)). |
| (blank) | Standard 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 filtered, regulated air to the tool-change and clamping circuits of a CNC machining centre, with the 5 um element protecting precision valves from fine particulate and the automatic drain keeping condensate off the bowl in an unattended cell.
Supplies clean, pressure-controlled air to the cylinders and air-operated diverters on a packaging conveyor line, where the square psi gauge lets line staff verify set pressure at a glance and the automatic drain suits continuous-shift running.
Conditions the air feeding spray guns in a paint booth: the 5 um grade reduces particulate carry-over into the finish, and the regulator holds a stable setting for consistent atomising across the shift.
Start with the port step: this size 400 unit carries a 3/8 inch PT port, one step up from the 1/4 inch size 300 frame, so size up when downstream demand is heavier - but confirm the match against the published flow curves rather than a single rating. The 5 um element (code W) suits lines that need finer particulate capture than the standard 40 um grade; keep 40 um where general protection is enough. The automatic drain handles condensate removal on its own, which matters where bowls are hard to reach or the line runs unattended. The square gauge here reads in psi; MPa and bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT as order options, and this code omits the mounting bracket. Before ordering, send us your application details and we will confirm sizing against the datasheet flow curves.
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 the GFR series as curves, not as a single rated number, so we do not quote a figure that is not in the datasheet. Tell us your application and downstream demand and we will confirm the sizing against the published curves and send the datasheet on request.
The A in the code GFR40010AJF2W selects the automatic drain, which expels collected condensate without anyone opening the bowl - useful for unattended or hard-to-reach installations. The GFR series is also available with a manual drain or the differential-pressure drain as the default; the regulation range differs by drain type, so confirm the variant you need when ordering.
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.