The AirTAC GFR40010ALJC2G 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 AirTAC GFR400 series is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit is the 400 size with a G3/8 (BSPP) port, the low-pressure regulator type, a 40 um standard filter element and an automatic drain, so collected condensate is expelled from the PC bowl without manual attention. A round gauge with a psi scale is fitted so the set pressure can be read at a glance, and no mounting bracket is included with this configuration.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, drain types (differential-pressure, automatic or manual), filter grades (40 um standard, 5 um optional), gauge styles and scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR40010ALJC2G 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 — 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. |
| G | G (BSPP) 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) |
Fixture clamps and swing cylinders on an assembly line often run at reduced line pressure to protect delicate workpieces. This filter regulator cleans the supply of water and swarf and holds the reduced setting, with the psi round gauge letting the setter verify the clamp pressure directly at the fixture.
Sealing jaws and vacuum-assist circuits on form-fill-seal and cartoning machines need clean, dry, steady air at a moderate setting. Mounted at the machine drop, this unit filters condensate and particles, regulates the sealing circuit, and its automatic drain keeps the PC bowl clear during continuous shifts without operator attention.
Test benches, pneumatic calibration rigs and pilot-air take-offs for analytical instruments require particulate-free air at a stable, reduced pressure. The low-pressure regulator type, 40 um filtration and the fitted psi gauge make this unit a tidy single-body supply point, with the automatic drain handling condensate in duty cycles that run unattended.
Start with the port step: the 400 size carries a 3/8 in port, and larger sizes give larger ports and more flow - match the size to the air demand of the circuit rather than to the pipe alone. This unit is the low-pressure regulator type, so if your line works at reduced set pressures it is the right choice; confirm the exact regulation span for this type with us before ordering. The automatic drain suits unattended installations, while manual and differential-pressure drains remain available in the family if you prefer scheduled or pressure-differential draining. The 40 um element is the standard grade; specify the W suffix if the application needs 5 um filtration. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. Thread here is G (BSPP) - PT is the standard option and NPT is also orderable. No bracket is fitted with this code; a bracket can be specified. Because flow is published as curves and not a single rating, 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. Tell us your application and we will confirm the flow and sizing data from the datasheet on request.
The A in the code selects the automatic drain: condensate collected in the PC bowl is expelled without anyone opening it, which suits installations that run unattended. The L selects the low-pressure regulator type, intended for applications set at reduced pressures; its exact regulation span is not published on the sheet we work from, so confirm it with us 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.