The AirTAC GFR40010ALJF2 AirTAC Filter Regulator PT3/8 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 GFR400 series combines water and particulate filtration with pressure regulation in a single body. This unit, GFR40010ALJF2, is the 400 size with 3/8 in PT ports, an automatic drain that expels collected condensate without operator action, a 40 um standard filter element, and the low-pressure regulator type. A square pressure gauge graduated in psi is fitted, the polycarbonate bowl suits the 400 size, and the unit is supplied without a mounting bracket (a bracket is available as an option). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The G-series filter regulator line spans the 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, drain choices (differential-pressure, automatic or manual), 40 um or 5 um (W) filtration, and MPa, psi or bar gauge scales. Because flow is published as curves rather than a single rating, we confirm flow and other datasheet figures on request.
| Model | GFR40010ALJF2 AirTAC Filter Regulator PT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 | Not fitted |
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. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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) |
Filtering and regulating supply to pneumatic clamps and fixtures on a machining cell that hold workpieces at reduced pressure, with the automatic drain keeping condensate out of the circuit.
Conditioning air for cylinders and actuators on a packaging line where a lower working pressure suits the mechanism, and the fitted psi gauge lets operators set and verify the setting.
Supplying filtered, regulated air to spray guns and coating equipment in a finishing shop, where the 40 um element removes water and particulate before the air reaches the gun.
Step up or down through the 200/300/400/600 sizes and their ports (1/8 to 1 in) to match the air demand of your line; the 400 size here carries 3/8 in PT ports. Drain type is a real choice: automatic (as fitted here) clears condensate by itself, manual drain needs operator action, and differential-pressure drain is the default on other variants. Filtration is 40 um standard; specify W for the 5 um element where finer filtration is required. The embedded square gauge reads in psi; MPa or bar scales and an external round gauge are options. Thread is PT as standard, with G (BSPP) and NPT available to order. The L in this code marks the low-pressure regulator type; its exact adjustment range is not published in the catalogue, so ask us to confirm it. 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 series as curves rather than a single rated figure, so we do not quote a number here. Ask us and we will confirm the flow and datasheet figures against your application before you order.
The A in the code sets automatic drain, so the bowl ejects collected condensate on its own with no manual draining. F2 sets the embedded square gauge with a psi scale; MPa or bar scales and an external round gauge are order options. The L marks the low-pressure regulator type, whose exact adjustment range we confirm 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.