The AirTAC GFR40010ALJF1WTK AirTAC Filter Regulator NPT3/8 5um 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.
GFR40010ALJF1WTK is an AirTAC GFR400 filter regulator in size 400 with a 3/8 in NPT port. In one body it removes water and particulate from compressed air and regulates downstream pressure. This configuration carries a 5 um filter element (code W), an automatic drain (code A), a low-pressure regulator type (code L) and an embedded square gauge with MPa scale (code F1); a reverse/check valve is fitted (code K). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The bowl on this size is polycarbonate; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options across the family include manual or differential-pressure drains, the 40 um standard element, gauge scales in MPa, psi or bar, G or NPT threads in place of the PT standard, and bracket choices. Flow for this unit is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40010ALJF1WTK AirTAC Filter Regulator NPT3/8 5um |
|---|---|
| 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 | Fitted — square, MPa 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. |
| 1 | Gauge scale: MPa. 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) |
Conditioning and regulating the air feed to a bench pneumatic press, where the low-pressure regulator type serves a circuit running at a reduced set pressure and the 5 um element protects the valve and cylinder from fine particulate.
A filter-regulator point on the air drop feeding carton-sealing and case-packing cylinders on a packaging conveyor, with the automatic drain discharging condensate that collects along the drop.
Supplying conditioned air to spray guns in a paint finishing booth, where the 5 um element reduces fine particulate in the air stream and the regulator holds the gun supply steady, with a local pressure readout on the square MPa gauge.
Size 400 with a 3/8 in NPT port sits mid-range in the GFR line; step up or down (sizes 200 to 600, ports 1/8 to 1 in) to match the air your circuit needs - we confirm sizing from the datasheet curves on request. This unit is specified with the 5 um element rather than the 40 um standard, which suits points of use that need finer particulate removal, and the automatic drain discharges collected condensate without manual attention. The regulator is the low-pressure type (code L); its exact adjustment range is not published in the data we hold, so confirm your set pressure with us before ordering. The embedded square gauge reads in MPa; external round gauges and psi or bar scales are ordering options. Thread here is NPT; PT is the standard and G (BSPP) is also a catalogue option. This unit is supplied without a mounting bracket, and a reverse/check valve is fitted.
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 GFR400 as curves rather than a single rated figure, so we do not quote a rated number. Tell us your application and we will confirm the flow data from the datasheet on request before you order.
Code L makes this a low-pressure regulator variant rather than the standard type; the exact adjustment range is not published in the data we hold, so confirm your set pressure with us. Code A is the automatic drain, which discharges condensate from the bowl without you having to open a manual drain. Manual and differential-pressure drains are alternatives within the family.
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.