The AirTAC GFR400C15ALJF2GK AirTAC Filter Regulator G1/2 Auto Drain 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 GFR400 series combines a water-and-particulate filter with a pressure regulator in a single body, so one G1/2 (1/2 in) connection delivers clean, controlled air. This unit is the low-pressure type, fitted with an automatic drain that expels collected condensate on its own, a 40 um filter element, an embedded square gauge scaled in psi, and a built-in reverse (check) valve. The bowl is metal, and no mounting bracket is included.
This is a genuine AirTAC part. The G-series filter regulators span sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options for G (BSPP) or NPT thread, manual, automatic or differential-pressure drain, a 5 um (W) element, gauge scale, and bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR400C15ALJF2GK AirTAC Filter Regulator G1/2 Auto Drain |
|---|---|
| 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) |
Filtered, regulated air at reduced pressure feeding cylinders and actuators on carton-sealing and wrapping machines, with the automatic drain handling condensate through long shifts.
Clean, pressure-controlled air to spray guns and atomisers in a finishing booth, where oil mist is unwanted and the low-pressure regulator type suits reduced-pressure circuits.
Pneumatic clamps and swing cylinders on machining fixtures that must run below full line pressure; the built-in check valve prevents backflow if the supply is interrupted.
Choose the size and port step against the air your line actually consumes: this unit is size 400 with a G1/2 (1/2 in) G-thread port, one step up from 3/8 in. It is the low-pressure type, intended for circuits that run below standard line pressure - because the exact adjustment range for this variant is not published in our data, confirm it with us before ordering. Drain choice matters: the automatic drain here removes condensate without attention, while manual and differential-pressure drains are available elsewhere in the series. The 40 um element is the standard grade; a 5 um (W) element can be ordered. The embedded square gauge is scaled in psi (MPa and bar scales are options), the check valve prevents backflow if the supply is interrupted, and G (BSPP) or NPT threads can be specified instead of the PT standard. 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.
Flow for the GFR400 series is published as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and the full datasheet figures on request.
The automatic drain expels collected condensate from the metal bowl without manual attention. The GFR series is also available with a manual drain or the differential-pressure (default) drain - just ask for the matching 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.