The AirTAC AirTAC GFR400-10AJF2WTK 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 GFR400-10AJF2WTK is an AirTAC GFR400 filter regulator: a single body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is built on the size 400 frame with a 3/8 in NPT port, carries the fine 5 um filter element (code W), and drains condensate automatically, so the bowl clears itself during operation without a manual stop. The embedded square gauge reads in psi, a reverse/check valve is fitted, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, thread options PT (standard), G and NPT, drain choices of differential-pressure, automatic or manual, and 40 um or 5 um filtration. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request before you order.
| Model | AirTAC GFR400-10AJF2WTK 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 | 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 | 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. 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Mounted at the drop feeding an assembly cell, the unit strips water and fine particulate from the header supply and holds a steady, set downstream pressure for the cell's air tools and actuators. The automatic drain keeps the bowl clear without an operator stopping by.
On a packaging or palletising conveyor line, the filter regulator conditions the air feeding cylinder-driven pushers and stops, protecting the cylinders from condensate carryover while keeping their stroke speed consistent at the set pressure.
At a laboratory or test bench where instruments and pneumatic fixtures need clean, stable air, the 5 um element catches fine particulate ahead of sensitive kit, and the psi gauge gives a direct local read of the regulated setting.
Size and port set the capacity envelope: this unit is size 400 with a 3/8 in NPT port, one step up from 300/1-4 in and one below 600/3-4 in, so match the frame to the air demand of the line. The 5 um element (W) suits points of use that need finer particulate control than the 40 um standard; the automatic drain suits unattended or hard-to-reach installations, while manual and differential-pressure drains remain available in the family. The square gauge here reads in psi; MPa and bar scales exist as options, and an external round gauge can be specified. NPT is the thread on this code; PT (standard) and G are the other orderable options, and a bracket is optional (this code omits it).
One honest note before ordering: AirTAC publishes flow as curves, not a single rated figure, so ask us to confirm sizing against your application and we will check the datasheet with you.
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 G-series flow as performance curves rather than a single rated figure, so we do not quote a number here. Ask us to confirm flow for this exact model and we will check the datasheet against your application's air demand before you order.
The A in the code selects the automatic drain: the bowl expels collected condensate on its own during operation, which suits unattended or hard-to-reach mounting. The family also offers manual and differential-pressure drains; note that with the automatic drain the regulator adjustment range is 0.15-0.9 MPa (20-130 psi).
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.