The AirTAC GFR400C15ALJF3TK 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 AirTAC GFR400C15ALJF3TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is specified with a 1/2 in NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in bar, the low-pressure regulator type, and a built-in reverse (check) valve that helps hold downstream pressure if the upstream supply dips. No mounting bracket is fitted; a bracket is available as an option. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, drain choices of differential-pressure, automatic or manual, and 40 um standard or 5 um (code W) filtration. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and other datasheet figures for your application before ordering.
| Model | GFR400C15ALJF3TK 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 the valve stack of a pneumatic clamping or press fixture that runs at a low set pressure: the low-pressure regulator type is intended for that band, while the 40 um element and automatic drain keep water and pipe swarf out of the directional valves.
Supplying cylinders and actuators on a packaging line that runs shifts without an operator at the air preparation point: the automatic drain clears condensate on its own, and the reverse valve helps hold the regulated pressure through brief upstream supply dips.
Preparing air for a robotic gripper or pick-and-place cell on a 1/2 in line: filtered, regulated air protects the gripper valves, and the check valve function helps the gripper maintain its holding pressure if the main supply is interrupted mid-cycle.
Size and port step up with air demand: 400 size serves 1/2 in lines, and this unit carries the NPT thread (PT is the AirTAC standard; G and NPT are order options). Drain type is a real choice: this configuration has an automatic drain, suited to unattended duty, while manual and differential-pressure drains are alternatives within the family. Filtration here is the 40 um standard element; specify code W for 5 um where finer protection is needed. The regulator is the low-pressure type (code L) - its exact adjustment range is not published, so confirm it against your set pressure with us. The embedded square gauge reads in bar; MPa and psi scales, and an external round gauge, are options. Because flow is published as curves and not as 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 GFR flow as curves, not as a single rated figure, so we do not quote a rated flow number for this unit. Send us your line size, working pressure and expected air demand, and we will confirm the sizing from the datasheet before you order.
The L code means this regulator is the low-pressure type rather than the standard version. Its exact adjustment range is not published, so tell us your set pressure and we will confirm suitability from the datasheet. For reference, standard-type GFR units with automatic or differential-pressure drain cover 0.15-0.9 MPa (20-130 psi).
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.