The AirTAC GFR40015ALF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR40015ALF3WT is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the size 400 unit with a 1/2 in NPT thread, a 5 um filter element (code W, finer than the 40 um standard), an automatic drain that ejects collected condensate without manual attention, the low-pressure regulator type, and the embedded square gauge scaled in bar. A mounting bracket is included. Maximum working (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 is available in sizes 200, 300, 400 and 600 with a full option set: 40 um or 5 um filtration, differential-pressure, automatic or manual drain, standard or low-pressure regulation, square or external round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application on request.
| Model | GFR40015ALF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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, bar 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. 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. |
| (blank) | Mounting bracket included. |
| (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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding the gripper and tool-change circuits on a robotic assembly cell: the 5 um element protects fine control valves from particulate and the low-pressure regulator holds a gentle, stable grip pressure.
Conditioning the air at a drop point on a cartoning or wrapping line, where the automatic drain clears condensate between shifts and the bar-scaled gauge gives operators a visible setpoint.
Supplying pneumatic actuators on laboratory automation and sample-handling equipment, where the 5 um grade and low-pressure regulation suit sensitive, low-force motion and the bracket simplifies panel mounting.
Start with the port step: this unit is size 400 with a 1/2 in NPT thread; smaller sizes 200 and 300 step down to 1/8-3/8 in and size 600 steps up to 1 in, so match the size to the air demand of the circuit. This example carries the 5 um element (W) instead of the 40 um standard - choose 5 um where downstream valves and instruments need finer particulate removal. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the other catalogue choices. The low-pressure regulator type is selected where the working band sits below the standard range - the exact adjustment window for the low-pressure type is not published, so confirm it with us. The embedded square gauge here is scaled in bar; MPa and psi scales and an external round gauge are alternatives. PT is the standard thread, with G and NPT as order options, and a bracket is included.
Because flow is published as curves rather than 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the relevant flow-curve figures from the datasheet on request before you order.
The automatic drain ejects collected condensate on its own, so it suits installations that run unattended or where the bowl is awkward to reach. The catalogue alternatives are manual drain and the default differential-pressure drain, and the drain choice also affects the regulator adjustment range, so pick it deliberately.
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.