The AirTAC GFR40010ALJF2TK 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 AirTAC GFR40010ALJF2TK is a size-400 GFR filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 3/8 in NPT port, a 40 um standard filter element, an automatic drain that ejects collected condensate without manual attention, and a low-pressure regulator type for circuits that run well below standard line pressures. It is fitted with the embedded square gauge scaled in psi and a reverse/check valve, and it is supplied without a mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um (W) filtration, gauge and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR40010ALJF2TK 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, 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. |
| (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) |
Fixture clamps and swing cylinders on a CNC cell that hold at reduced line pressure get filtered air and a stable, low setpoint from one body, with the psi gauge giving the operator a direct readout at the fixture.
Heat-seal and crimp jaws on a bagging or wrapping line need clean, dry air held at a gentle, repeatable pressure; the automatic drain keeps condensate out of the valves during continuous multi-shift running.
Bench-scale reactors, sparging lines and sample-transfer panels supplied from a shop-air header use the low-pressure regulator type to trim delicate air streams, with the check valve holding the setpoint against upstream dips.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up to 600 or down to 300 according to the flow your line needs, and confirm the step against the published flow curves before ordering. The automatic drain suits unattended duty; choose manual (M) or differential-pressure (blank) if you prefer operator-controlled or load-linked drainage. The 40 um element is the standard grade; specify W for 5 um where finer particulate removal matters. The square gauge here reads in psi; MPa and bar scales and an external round gauge are alternatives.
Thread is NPT on this unit; PT is the catalogue standard and G (BSPP) is also an order option. The J code means no mounting bracket is included - add one if the unit will be wall- or panel-mounted rather than carried by the piping. Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before you order.
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 filter-regulator performance as flow curves rather than a single rated figure, so we do not quote a l/min, SCFM or Cv number. Tell us your inlet pressure, set pressure and demand, and we will confirm the sizing from the datasheet curves on request before you order.
The A code fits an automatic drain, which ejects collected condensate from the polycarbonate bowl on its own - useful where the unit is mounted in a hard-to-reach spot or runs unattended; manual (M) and differential-pressure (blank) drains are the alternatives. The L code selects the low-pressure regulator type, intended for circuits that operate well below standard line pressure; its exact adjustment range is not published, so confirm it with us for your setpoint.
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.