The AirTAC GFR40010ALJF2WGK AirTAC Filter Regulator G3/8, 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.
This AirTAC GFR400 filter regulator combines two jobs in one body: it strips water and particulate from compressed air through a 5 um (code W) element, then regulates downstream pressure. This configuration is the low-pressure type (code L), so it suits circuits held at reduced working pressure rather than full line pressure. It has a G3/8 (BSPP) port, an automatic drain that bleeds collected condensate from the PC bowl without manual attention, an embedded square gauge reading in psi, and a reverse/check valve (code K) fitted. No mounting bracket is included (code J). Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The exact regulation range for the low-pressure type is not published in the catalogue; we confirm it on request.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 inch, PT (standard), G or NPT threads, differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, standard or low-pressure regulation, gauge and scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR40010ALJF2WGK AirTAC Filter Regulator G3/8, 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 | Automatic 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". |
| 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. |
| 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. |
| 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) |
On a machining cell where workpieces are held by air clamps that must not be squeezed at full line pressure, this filter regulator cleans the supply to 5 um and holds a reduced, stable working pressure, with the check valve helping the circuit hold its setting between cycles.
Bench test rigs and small laboratory processes running at reduced air pressure need clean, dry, steadily regulated air. The 5 um element protects sensitive instruments, the automatic drain keeps condensate off the bench, and the psi gauge gives a direct local reading.
Pilot-air supplies for pneumatically actuated process valves often run well below main header pressure. This unit filters the pilot air, regulates it to the actuator's rated pressure, and the reverse/check valve prevents backflow disturbing the pilot setting.
Start with size and port: the 400 size with a 3/8 port sits mid-range in the GFR line, so step up to 600 or down to 300 depending on the air demand of the circuit - we will check the published flow curves against your consumption if you send the figures. This unit is already specified with the choices that matter for a low-pressure circuit: 5 um filtration for finer protection than the 40 um standard element, an automatic drain where manual draining is impractical, a psi-scale square gauge, and a reverse/check valve to hold downstream pressure. Thread is G (BSPP); PT is the catalogue standard and NPT is also available to order. No mounting bracket is included with the J code - add one if the unit needs panel or surface fixing. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application 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 the GFR series as curves, not as a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Send us your air demand and line conditions and we will confirm the flow and full datasheet figures for this exact model on request.
L is the low-pressure regulator type, for circuits held at reduced working pressure (its exact regulation range is not published; we confirm it on request). W is the 5 um filter element instead of the 40 um standard. A is the automatic drain, which empties the PC bowl without manual attention. K means a reverse/check valve is fitted. J means no mounting bracket is included.
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.