The AirTAC GFR40010LJF2TK 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 differential-pressure 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 GFR40010LJF2TK 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 is the low-pressure type, built for circuits that run well below standard line pressure, with a 3/8 in NPT port, the standard 40 um filter element, differential-pressure drainage of the PC bowl, a fitted embedded square gauge scaled in psi, and a reverse/check valve holding downstream pressure if the supply drops. No mounting bracket is included.
This is a genuine AirTAC part. The GFR400 size sits in the G-series range of 200, 300, 400 and 600 bodies, with port options from 1/8 to 1 inch, G/NPT thread variants, manual or automatic drain choices, a 5 um (W) filter grade option and gauge scale choices. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR40010LJF2TK 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure 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) |
Feeds and regulates the clamp circuit of a welding or assembly fixture that runs at reduced pressure, with the check valve holding clamp force if the main supply dips.
Conditions and regulates supply to the cylinders and actuators on a cartoning or wrapping line, with the 40 um element catching pipe scale and condensed water ahead of the valves.
Supplies clean, low-pressure regulated air to bench-top test apparatus and pilot rigs, with the psi-scaled square gauge giving the operator a direct pressure readout at the bench.
Size 400 with a 3/8 in port is the mid-large step in the G-series range; step up to 600 or down to 300 depending on the flow your line needs, and confirm the curve with us before ordering. This unit is the low-pressure type, so it belongs on circuits regulated well below the standard 0.15-0.9 MPa window - ask us to confirm the exact adjustment range from the datasheet. The differential-pressure drain works automatically as flow passes the element; choose the M (manual) or A (automatic) code variant if your duty cycle suits that better. The standard element is 40 um; specify W for 5 um where downstream equipment needs finer filtration. The fitted square gauge reads in psi; MPa or bar scales and an external round gauge are alternatives. This code is NPT thread; G (BSPP) and PT are the other catalogue options. J means no bracket - add the bracket variant if you panel- or wall-mount the unit. Flow is published as curves, not a single rating, so send us your application conditions and we will confirm sizing 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 this series as performance curves rather than a single rated figure, so we do not quote a number out of context. Tell us your line pressure, regulated setpoint and the flow your equipment needs, and we will confirm the sizing against the datasheet curves before you order.
J means no mounting bracket is supplied with this unit, and K means a reverse/check valve is fitted, which holds downstream pressure if the upstream supply is lost. Maximum working (inlet) pressure is 1.0 MPa (145 psi); as a low-pressure type it is intended for circuits regulated well below that, and we will confirm the exact adjustment range from the datasheet on request.
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.