The AirTAC GFR40010ALF3TK AirTAC Filter Regulator NPT3/8 Low-Pressure is a genuine G-series filter regulator: water separation, 40 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 GFR40010ALF3TK is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air through a 40 um element, then regulates downstream pressure. This configuration is the low-pressure type, sized for 3/8 in NPT ports, with an automatic drain that discharges collected condensate without manual attention, a reverse/check valve fitted, and an embedded square gauge reading in bar. The polycarbonate bowl carries a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions. A mounting bracket is included.
This is a genuine AirTAC part. The GFR400 series is one of four sizes (200/300/400/600) with port options from 1/8 to 1 inch, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um (W) filtration, and gauge scale choices. Flow figures are published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR40010ALF3TK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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, bar 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
On a low-pressure clamping circuit for a CNC fixture, this unit filters machining-air moisture to 40 um and holds the regulated clamp pressure, with the bar-scale gauge giving the operator a direct reading at the fixture.
Feeding solenoid valves and actuators in a robotic spot-welding cell, the 3/8 in NPT ports match the cell's air drop, the automatic drain keeps condensate off the valves, and the check valve protects the setting if supply pressure dips.
On a packaging line running low-pressure cylinders for diverters and pushers, this low-pressure-type filter regulator conditions the supply, and the automatic drain handles condensate on a line that runs unattended across shifts.
Size and port step up with required flow: the GFR400 here carries 3/8 in NPT ports, and larger sizes move to larger ports and higher flow capacity. This unit is the low-pressure type, so if your circuit runs at low regulated pressures, confirm the exact adjustment range with us before ordering, since it is not published in the standard table. The automatic drain suits unattended duty; a manual or differential-pressure drain is the alternative where a different code fits better. Filtration is the 40 um standard element; specify W for 5 um where finer protection is needed. The square gauge here reads in bar; MPa and psi scales are available. Thread is NPT in this code, with PT standard and G as catalogue options. Flow is published as curves, not a single rating, so 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 GFR400 series as curves, not as a single rated number, so we do not quote a figure. Tell us your application and we will confirm the flow and sizing data from the datasheet on request before you order.
The A in the code means the bowl drains collected condensate automatically, so no one has to bleed it by hand - useful on unattended equipment. The L in the code marks the low-pressure regulator type, intended for circuits regulated at low pressures; its exact adjustment range is not published in the standard table, so confirm it with us 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.