The AirTAC GFR400C15ALNWT AirTAC Filter Regulator NPT1/2, 5 um 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 See datasheet ports, a differential-pressure 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 GFR400C15ALNWT is a filter regulator: one body that removes water and particulate from compressed air and holds the downstream pressure at your set point. This size 400 unit is threaded NPT1/2 (1/2 in), carries the 5 um filter element (code W, against the 40 um standard) and an automatic drain that expels collected condensate from the metal bowl without anyone opening it. The regulator is the low-pressure type, the unit is supplied without a gauge, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with ports from 1/8 to 1 in and options across drain type, filter grade, gauge style and scale, and PT, G or NPT thread. AirTAC publishes flow for this series as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures against your application before you order.
| Model | GFR400C15ALNWT AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Filter and regulate the air feeding a bench pneumatic press: the 5 um element protects directional valves and cylinders from particulate and water while the regulator holds a steady set point for repeatable forming.
On a carton-forming and sealing line, this unit conditions the air feeding the clamp and pusher cylinders, with the automatic drain handling condensate at a drop point operators rarely visit.
At a CNC machine tool's air drop, the GFR400C15ALNWT filters the shop supply down to 5 um and regulates it to the level the machine's pneumatic clamps and tool-change cylinders need.
The real choices in this code are the ones you can decode: size 400 with a 1/2 in NPT port steps up capacity within the GFR range (sizes 200/300/400/600), the W element tightens filtration from the 40 um standard to 5 um, and the automatic drain suits points where nobody will regularly bleed the bowl - manual or differential-pressure drains can be selected instead if you prefer a different drain behaviour. The low-pressure type (L) regulator is intended where set points sit below the standard range; the exact range is not published in the material we hold, so confirm it with us. The gauge is omitted here (code N), but gauge styles with MPa, psi or bar scales exist in the series, PT is the standard thread with G and NPT as order options, and a bracket is included. Flow is published as curves, not a single rating - ask us to check the curve against your required flow 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 rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
This unit carries code A: an automatic drain that expels collected condensate from the bowl without manual bleeding. The GFR series is also available with manual or differential-pressure drains in the same size, so a different drain type can be selected if it suits your maintenance routine better.
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.