The AirTAC GFR40010ALJNTK AirTAC Filter Regulator NPT3/8 Auto Drain 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 GFR40010ALJNTK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with 3/8 in NPT ports, an automatic drain that ejects collected condensate without manual attention, and the standard 40 um filter element. It is the low-pressure type and carries a built-in reverse (check) valve, and it ships without a pressure gauge or mounting bracket, so add a gauge separately if the panel requires a visual pressure readout.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, optional 5 um filtration (code W), manual or differential-pressure drain alternatives, G (BSPP) or NPT thread options, and gauge or bracket variants. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40010ALJNTK AirTAC Filter Regulator NPT3/8 Auto Drain |
|---|---|
| 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
Feeds filtered, regulated air to the cylinder and valve manifold bank on a carton-forming or wrapping line, with the automatic drain handling condensate during continuous shifts so the bowl never needs bleeding by hand.
Supplies cleaned air at reduced pressure to bench-top process equipment and pilot rigs that operate below standard regulator settings, where the low-pressure type and fitted check valve hold the circuit back from back-feeding.
Conditions the air feeding pneumatic screwdrivers, clamps and small press cylinders at an assembly workstation, dropping out water and 40 um-scale particles before they reach the tools' valve seats.
Start with the port step: size 400 with 3/8 in NPT threads suits lines plumbed at 3/8 in; step up to size 600 or down to 300/200 if your piping or flow demand differs. The automatic drain here is the right choice where the unit sits in an inaccessible spot or where condensate must be removed continuously; choose the manual-drain variant only if you want drain-on-demand control. The standard 40 um element covers general air prep; specify the W code for 5 um filtration where downstream valves or instruments need finer protection. This is the low-pressure (L) type, selected where the circuit works below the standard regulator range - confirm the exact adjustment window with us. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also orderable. A gauge, a mounting bracket, and a reverse-valve delete are all configurable - this unit has the check valve fitted but no gauge and no bracket. Because flow is published as curves rather than one rated number, send us your application details and we will confirm sizing against the datasheet 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 flow for the GFR series as curves, not as a single rated number, so we do not quote a l/min, m3/h or SCFM figure here. Send us your line pressure and the flow your application needs and we will confirm the sizing against the datasheet on request before you order.
The N in the code means no pressure gauge is fitted; a gauge can be ordered as an option if you want a visual readout of downstream pressure. The K means a reverse (check) valve is built in, which prevents downstream pressure from pushing back through the unit. The L marks it as the low-pressure regulator type, and 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.