The AirTAC GFR40010ALJF2GK AirTAC Filter Regulator G3/8 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 GFR40010ALJF2GK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is built on the 400 size with a G3/8 (BSPP) port, carries the standard 40 um filter element, and is the low-pressure (L) regulator type for circuits that run below standard line pressure. It is fitted with an automatic drain, so collected condensate is expelled without manual attention, an embedded square gauge reading in psi, and a reverse (check) valve that holds downstream pressure if the upstream supply is lost. No mounting bracket is included in this version.
This is a genuine AirTAC part. The GFR family is offered in 200, 300, 400 and 600 sizes covering ports from 1/8 to 1 inch, with manual, automatic or differential-pressure drains, a 5 um (W) filter grade option, gauge scale choices, PT/G/NPT thread options and bracket variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR40010ALJF2GK AirTAC Filter Regulator G3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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. |
| G | G (BSPP) 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 machining cell that run at reduced line pressure get filtered air plus stable low-pressure regulation from one G3/8 unit, with the check valve holding clamp pressure if the supply drops.
On a cartoning or wrapping line, bag sealers and gate cylinders need water and grit removed before regulation; the automatic drain keeps condensate off the machine floor during continuous shifts without operator attention.
Purge air, agitating air and actuator supply on pilot-scale process skids often run well below standard line pressure; the low-pressure type regulator with a psi-reading square gauge lets technicians set and read the working point directly.
Start with the size and port: the 400 size sits mid-range in the GFR line (200/300/400/600), and this unit takes a G3/8 port - step up or down a size if your flow demand or existing pipework calls for it. This version is the low-pressure (L) regulator type, so choose it only for circuits that operate below standard working pressure; the standard type is the alternative for general line regulation. The automatic drain suits unattended installations, while manual and differential-pressure drains are the other catalogue choices. The 40 um element is the standard grade; specify the W code for 5 um where finer filtration is needed. The square gauge here reads psi; MPa and bar scales are also available. Thread is G (BSPP) on this unit - PT is the standard, with G and NPT as order options - and this version omits the mounting bracket. Flow is published as curves, not a single rating, so 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 GFR400 as curves, not as a single rated figure, so we do not quote a l/min or SCFM number. Tell us your inlet pressure, downstream setting and required flow, and we will confirm against the datasheet whether this 3/8 unit is correctly sized before you order.
The A in the code selects the automatic drain: condensate collected in the polycarbonate bowl is expelled on its own, which suits installations that are not checked daily (manual and differential-pressure drains are the other options). The K code adds a reverse (check) valve, so downstream pressure is held if the upstream supply is interrupted - useful for clamping and holding circuits.
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.