The AirTAC GFR400C15ALJC3T AirTAC Filter Regulator NPT1/2 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 See datasheet ports, a differential-pressure 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 GFR400C15ALJC3T is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 400 unit carries a 1/2 in NPT port, an automatic drain that ejects collected condensate without operator attention, a 40 um standard filter element, and the L-code low-pressure regulator type for circuits that call for set pressures below the standard type's range. A round gauge with a bar scale is fitted, and the polycarbonate (PC) bowl is the catalogue material for this size.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include manual or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, PT, G or NPT threads, and mounting brackets. Flow is published as curves rather than a single rating, so ask us to confirm the figures from the datasheet for your application.
| Model | GFR400C15ALJC3T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding filtered, regulated air to spray guns and air-assisted applicators on a finishing line, where water or particulate in the supply would spoil the finish; the automatic drain keeps the bowl clear between shifts.
Supplying clean, regulated air to the cylinders and grippers on a carton-forming or filling line, with the 40 um element protecting directional valves from condensate and debris.
Regulating supply pressure to the clamp cylinders of a pneumatic press or fixture, where the low-pressure type regulator serves circuits set below the standard type's range.
Size the unit against the air demand of the circuit: size 400 with a 1/2 in port sits in the upper half of the GFR range, but flow is published as curves rather than a single rated figure, so let us check the curve against your consumption before ordering. Choose the drain to match maintenance practice: automatic (this unit) clears condensate by itself, manual needs operator action, and differential-pressure drain is the catalogue default. The 40 um element is standard; specify the W grade for 5 um where downstream valves need finer filtration. Gauge choices are the embedded square gauge or an external round gauge with MPa, psi or bar scales - this unit carries a round gauge reading in bar. Thread here is NPT; PT is the standard catalogue thread and G is also available. The J code means no mounting bracket is supplied, so order a bracket variant if you panel- or wall-mount. The L code marks the low-pressure regulator type; its exact setting range is not published, so confirm it with us.
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 GFR400 flow as curves, not as a single rated figure, so we do not quote a number here. Send us your working pressure and air consumption and we will confirm the flow from the datasheet curve for this size 400, NPT1/2 unit before you order.
The A code in GFR400C15ALJC3T fits the automatic drain, which discharges collected condensate from the bowl without operator action. The catalogue also offers manual drain (code M) and differential-pressure drain (blank) on GFR units, and the 40 um element can be specified as a 5 um element by ordering the W grade.
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.