The AirTAC GFR40010ALJC2 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, so one 3/8 in (PT3/8) unit both cleans the compressed air and sets the downstream working pressure. This configuration, GFR40010ALJC2, is the low-pressure regulator type with a 40 um standard filter element, an automatic drain that expels collected condensate without manual attention, a round external gauge reading in psi, no reverse/check valve, and no mounting bracket. The polycarbonate bowl lets you see the condensate level at a glance; 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 from the G-series air-treatment line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, a 5 um (code W) element option, gauge style and scale choices, and PT, G (BSPP) or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40010ALJC2 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 — round, 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). |
| C | Gauge shape: Round. 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) |
On a carton-closing or blister press fed from the plant main, this 3/8 in filter regulator cleans the supply and holds the working pressure at the low setting the press cylinder needs, while the automatic drain keeps condensate out of the valve stack below.
Looms and knitting machines run many small air jets and cylinders from a shared 3/8 in drop; a low-pressure filter regulator at each machine protects the delicate jet components from water and scale and keeps the regulated pressure steady through the shift.
In an assembly cell where grippers and small actuators are deliberately run at reduced pressure to protect delicate parts, this unit filters the incoming air, regulates it down to the low working band, and shows the setpoint on the round psi gauge at the panel.
Start with the port step: GFR400 carries PT3/8 ports, so match it to the 3/8 in air line feeding your machine - if your flow demand points to a neighbouring size, the 200/300/400/600 range lets you step up or down. Because this unit is the low-pressure regulator type, it suits circuits held below the standard regulated band; the exact adjustment range for the low-pressure type is not published in the sheet we work from, so confirm it with us against your setpoint. The automatic drain is the right choice where the unit sits in an awkward or unattended position; choose manual where you prefer a controlled, periodic blow-down, or differential-pressure where you want draining tied to the pressure drop across the element. The 40 um element is the standard grade for general plant air; specify the 5 um (W) option only where finer filtration is genuinely needed. The round psi gauge is fitted as coded, and PT is the standard thread - G (BSPP) and NPT are order options. A bracket is not included with this code, so plan the mounting accordingly. 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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, downstream demand and acceptable pressure drop, and we will confirm the flow data from the datasheet for this exact 3/8 in unit before you order.
The A in the code sets the automatic drain: the bowl expels collected condensate on its own as conditions allow, so the unit suits positions that are hard to reach or left unattended. If you would rather control draining yourself, the same series is available with a manual drain, and the catalogue default is a differential-pressure drain - each is a separate order code.
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.