The AirTAC GFR400-10LF2WGK AirTAC Filter Regulator 3/8 in, 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 differential-pressure 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 GFR400-10LF2WGK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit has a G3/8 (BSPP) port with G thread, a 5 um filter element (code W, one step finer than the 40 um standard), a differential-pressure drain, and a polycarbonate bowl. It is the low-pressure type, and it comes with an embedded square gauge scaled in psi, a reverse/check valve (code K), and a mounting bracket.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with choices of thread (PT standard; G and NPT to order), drain type, filter grade, gauge scale and reverse valve. Max 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 rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR400-10LF2WGK AirTAC Filter Regulator 3/8 in, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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. |
| 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. |
| G | G (BSPP) 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds a clamping cylinder on a pneumatic press: the 5 um element keeps fine particulate out of the directional valve, the low-pressure regulator sets the clamping force, and the reverse/check valve holds the downstream side.
Supplies regulated air to stopper and pusher cylinders along a packaging conveyor. The differential-pressure drain bleeds collected condensate while the line runs, and the psi gauge lets technicians set and verify cylinder pressure at the station.
Prepares air for spray guns and coating heads in a finishing booth, where the 5 um element reduces particulate in the atomising air and the low-pressure regulator holds the gentle, stable pressure fine finishing work needs.
Choose the size by the port and flow step: this size 400 unit carries a 3/8 in port, and the series steps through ports from 1/8 to 1 in across sizes 200 to 600 - size up when your flow demand sits near the top of a smaller unit's curve. This unit is already specified with the 5 um element (W) instead of the 40 um standard, a differential-pressure drain, a square psi gauge, a reverse/check valve and a G thread; if you need manual or automatic drain, a different gauge scale (MPa or bar), or NPT instead of G, those are catalogue options on the same series. The low-pressure type (L) is the regulator variant fitted here; its exact adjustment range is not published, so confirm it against your set pressure before ordering. Because flow is published as curves rather than a single rated figure, send us your flow and pressure requirements and we will confirm sizing from the datasheet.
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 GFR400 flow as curves against pressure and flow rate, not as a single rated figure, so we do not quote a number here. Send us your required flow and working pressures and we will confirm from the datasheet whether this 3/8 in unit is correctly sized for your application.
W selects the 5 um filter element instead of the 40 um standard. The finer element suits downstream components that are sensitive to finer particulate. It is a catalogue option across the GF/GFR/GFC/GC families, and the differential-pressure drain, square psi gauge and other settings on this unit are unchanged.
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.