The AirTAC GFR40015ALJF2GK 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 PT1/2" 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 GFR40015ALJF2GK is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air through a 40 um element, then lets you set a reduced downstream pressure, with the fitted square gauge reading in psi so you can watch the set point at a glance. This configuration is built for 1/2 in (G1/2) ports with G (BSPP) threads, carries an automatic drain that expels collected condensate without anyone opening the bowl, and includes a reverse (check) valve. It is the low-pressure type, intended for circuits that hold reduced pressures below the standard range; the exact adjustment range for the L type is not published in our material, so confirm it with us. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 400 size; only the 600 size uses an aluminium alloy bowl.
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, and options include manual or differential-pressure drains, a 5 um (W) element, round external gauges with MPa, psi or bar scales, and NPT or G threads in place of the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40015ALJF2GK AirTAC Filter Regulator G1/2 Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (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 — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 15 | Port size PT1/2". 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). |
| F | Gauge shape: Square. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding clamp and gripper cylinders on an end-of-line palletiser: the 40 um element strips water and pipe scale before the valves, the regulator holds a steady reduced pressure for consistent clamping, and the automatic drain keeps condensate off the bowl during multi-shift running.
Supplying form-fill-seal and cartoning machines where air cylinders run continuously: filtered, regulated air protects the machine's valve island, the psi-reading square gauge lets the line technician verify the set point, and the check valve holds downstream pressure if supply dips.
On a leak-test or functional test bench that works at reduced pressures below the standard regulator range, the low-pressure (L) type gives finer control in that band, while the automatic drain and 40 um filtration keep test air clean and dry.
Step up or down through the GFR sizes (200/300/400/600) against the port and the flow your line needs; this 400 unit sits at 1/2 in. Choose the drain to match attendance on site: automatic (this unit) for unattended condensate rejection, manual where someone checks the bowl routinely, or differential-pressure as the default. Pick the 40 um standard element for general plant air, or the 5 um W option where downstream equipment needs finer filtration. Gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and bracket inclusion are all decodable from the code. Flow 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Send us your line pressure, set pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves before you order.
A is the automatic drain code: the bowl rejects collected condensate by itself, so it suits points that are not checked daily. The L marks the low-pressure regulator type, intended for reduced set pressures below the standard range; the exact adjustment range for the L type is not published in our material, so confirm it with us. This unit also carries K (a reverse/check valve), J (no bracket), a square psi gauge and a G (BSPP) 1/2 in port.
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.