The AirTAC GFR40015ALJF2WK AirTAC Filter Regulator PT1/2, 5 um is a genuine G-series filter regulator: water separation, 5 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 GFR40015ALJF2WK is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is the 400 size with PT1/2 (1/2 in) PT-threaded ports, the fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for circuits that run below standard line pressure. It carries an embedded square gauge scaled in psi, a built-in reverse/check valve, and is supplied without a mounting bracket. The polycarbonate bowl suits the standard -5 to 70 C (non-freezing) operating range, with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is orderable with manual, automatic or differential-pressure drains, 40 um or 5 um elements, square or round gauges in MPa, psi or bar scales, a reverse/check valve, and G (BSPP) or NPT threads as alternatives to the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR40015ALJF2WK AirTAC Filter Regulator PT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Pneumatic hold-down clamps on a panel press often run below standard line pressure. This low-pressure-type filter regulator conditions the branch feed, removes water and chips-carried particulate at 5 um, and holds the clamp circuit at its set point while the check valve holds downstream pressure if the supply dips.
Conveyor and gating cylinders along a bottling line need clean, regulated air at each drop. Mounted at the 1/2 in branch take-off, this unit filters condensate and fines with automatic drain-down, regulates the branch to the actuators' working pressure, and shows the set point on the psi gauge without opening a panel.
Analytical instruments and sample-handling valves in a lab enclosure need dry, finely filtered air at a stable, often reduced pressure. The 5 um element protects sensitive components, the low-pressure regulator type suits reduced-pressure circuits, and the automatic drain keeps the bowl clear where access is restricted.
Start with the port step: the 400 size here is PT1/2, one of the steps from 1/8 in up to 1 in across the GFR range - pick the size whose flow curve covers your demand rather than upsizing blindly. Choose the drain to match maintenance reality: automatic (as here) suits inaccessible or infrequently attended installations, manual suits supervised points, and differential-pressure draining is the catalogue default. Choose the 5 um element (code W) where downstream equipment needs finer filtration than the 40 um standard. The square gauge is fitted here scaled in psi; MPa and bar scales and an external round gauge are alternatives. Thread is PT as standard - order G (BSPP) or NPT explicitly if your piping needs them - and the J code means no bracket is included, so plan your own mounting.
Two honest routings: flow is published only as curves with no single rated figure, so send us your application and we will confirm sizing from the datasheet before you order. This is also the low-pressure regulator type, and its exact adjustment range is not published in the sheet we work from - confirm the range with us if your set pressure is critical.
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 figure, so we do not quote a number here. Send us your application - supply pressure and the flow your equipment needs - and we will confirm from the datasheet whether the GFR400 at PT1/2 covers it before you order.
The L code means this unit carries the low-pressure regulator variant rather than the standard one, intended for circuits regulated below standard line pressure. The exact adjustment range for the low-pressure type is not published in the sheet we work from, so we do not state a figure - confirm the range with us and we will check it against the datasheet for your set pressure.
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.