The AirTAC GFR40010ALJC3T AirTAC Filter Regulator NPT 3/8 Low-Press 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 GFR40010ALJC3T is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in one body, sized for 3/8 in NPT ports. This configuration carries an automatic drain, so collected condensate is ejected from the polycarbonate bowl without manual attention, and a 40 um standard filter element for everyday water and particulate removal. It is the low-pressure regulator type, fitted with an external round gauge scaled in bar, and it ships without a mounting bracket. 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 GFR series is available in sizes 200, 300, 400 and 600 with a choice of ports, drain types (differential-pressure, automatic or manual), 40 um or 5 um (W) filter grades, gauge styles and scales, and PT, G or NPT threads. Published flow data appears as curves rather than a single rating, so ask us to confirm the figures for your application before ordering.
| Model | GFR40010ALJC3T AirTAC Filter Regulator NPT 3/8 Low-Press |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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. |
| 3 | Gauge scale: bar. 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. |
| (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 CNC fixture circuit that holds clamps at a reduced, stable pressure, this filter regulator cleans the supply, drains condensate automatically and lets the operator read the set point directly on the bar-scaled round gauge.
Packaging machines with heat-seal or forming cylinders often run below full line pressure. This low-pressure type GFR400 filters the shop air, regulates it down for the station and keeps the bowl clear without daily manual draining.
Air-jet blowing and thread-guiding functions on looms and winders need filtered air at a modest, steady pressure. This 3/8 in NPT unit conditions the supply and regulates it to the level the jets require, with the gauge showing the setting in bar.
Choose the size and port step against the air demand of your circuit: this unit is size 400 with a 3/8 in NPT port, and larger sizes carry larger ports and more flow. Drain type is a real choice - differential-pressure (default), automatic (this unit) or manual - with automatic draining the bowl on its own once enough condensate collects. Filter grade is 40 um standard or 5 um with code W; gauge style and scale (MPa, psi or bar) are selectable; thread is PT as standard with G and NPT as order options; and a bracket can be added where panel or wall fixing is needed. Flow for the GFR series is published as curves, not a single rating, so ask us to confirm sizing against your application before you order.
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 GFR series as curves rather than a single rated figure, so we do not quote one number. Tell us your application and we will confirm the flow and datasheet figures for this 3/8 in NPT, size 400 unit on request before you order.
In the model code, A selects the automatic drain (instead of the differential-pressure default or a manual drain), C selects the external round gauge and 3 sets its scale to bar. J means no mounting bracket is supplied, and the absence of K means no reverse/check valve is fitted.
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.