The AirTAC GFR40015ALNWT AirTAC Filter Regulator NPT1/2 5 um Auto Drain 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 AirTAC GFR40015ALNWT 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 built with a 1/2 in NPT port, a fine 5 um filter element (code W), and an automatic drain that bleeds collected condensate from the PC bowl without manual attention. It is the low-pressure regulator type, supplied without a gauge and without a reverse/check valve, and 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 filter-regulator line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, a 40 um standard or 5 um fine element, gauge and scale options, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR40015ALNWT AirTAC Filter Regulator NPT1/2 5 um Auto Drain |
|---|---|
| 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (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. |
| 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 filtered, pressure-controlled air to a bench or floor pneumatic press station, where the 5 um element protects valves and cylinders from particulate and the automatic drain keeps condensate off the shop floor without daily bowl checks.
Supplying air to carton-forming and case-sealing machinery on a packaging line, where the low-pressure regulator type matches actuators that run at reduced settings and the 1/2 in port serves the line's main drop.
Conditioning the air drop that serves an assembly cell's air tools and clamping fixtures, combining water and particle removal with regulation in one body and freeing maintenance from manual drain rounds via the automatic drain.
Step up through the GFR sizes (200, 300, 400, 600) and their port sizes (1/8 in to 1 in) according to the air demand of the circuit; this unit sits at size 400 with a 1/2 in NPT port. Drain choice is real: differential-pressure (default), automatic (this unit) or manual - automatic suits points that cannot be walked regularly. Filter grade is 40 um standard or 5 um fine (this unit is W, the fine grade) for downstream components that need cleaner air. Gauge options, bracket J-code, and PT versus G/NPT thread are all decodable choices - this configuration is NPT thread, no gauge, bracket included, low-pressure regulator type. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering; the exact adjustment range of the low-pressure type is likewise confirmed on request.
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 rated flow, Cv or SCFM number. Tell us your application and we will confirm the datasheet flow curves and sizing for this 1/2 in, size 400 unit on request.
In the GFR code, W selects the 5 um fine element instead of the 40 um standard, and A selects the automatic drain instead of the default differential-pressure drain. This GFR40015ALNWT carries both, so it delivers finer filtration and drains collected condensate on its own. The 40 um / manual-drain and other combinations are available in the same series if your point of use does not need them.
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.