The AirTAC GFR40015ALJF3TK AirTAC Filter Regulator NPT 1/2 in 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 AirTAC GFR40015ALJF3TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is threaded NPT 1/2 in, carries the standard 40 um filter element, has an automatic drain on its PC (polycarbonate) bowl, an embedded square gauge scaled in bar, and a built-in reverse (check) valve. It is the low-pressure regulator type and is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options across the range include manual or differential-pressure drains, a 5 um element (code W), MPa, psi or bar gauge scales, G (BSPP) or NPT threads, and a mounting 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 figures from the datasheet for your application.
| Model | GFR40015ALJF3TK AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Conditioning and regulating the air feeding clamp-and-release cylinders on a carton sealing line, where the low-pressure type regulator suits circuits that hold a gentle set pressure for delicate product handling.
Supplying filtered, regulated air to pneumatic actuators on laboratory sample-handling equipment, with the 40 um element and automatic drain keeping moisture and debris out of precision components.
Regulating air to gate and diverter cylinders along a bottling conveyor, with the fitted check valve protecting the regulated downstream circuit from backflow when the upstream supply is vented or isolated.
Choose the size and port against the air demand of the circuit: this unit is size 400 with a 1/2 in NPT port, the larger step in the range for higher-flow lines. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing from the datasheet before you order. This configuration is the low-pressure regulator type; its exact regulation range is not published in the material we hold, so confirm your set pressure with us if it is critical to the circuit.
Other decodable choices: the automatic drain here discharges condensate without manual attention, while manual and differential-pressure drains are alternatives in the series; the 40 um element is standard with a 5 um option (code W); the square gauge is scaled in bar, with MPa or psi scales available; and G (BSPP) or NPT threads can be ordered where PT is the standard. Brackets are optional across the series; this unit omits one.
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 GFR400 flow 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 for this model on request.
The L in the code marks the low-pressure regulator variant of the GFR400. Its exact regulation range is not published in the material we hold, so confirm the set pressure you need with us before ordering. This configuration also carries an automatic drain, a 40 um element, a square gauge scaled in bar, a fitted check valve and an NPT 1/2 in thread.
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.