The AirTAC GFR400-15ANWT AirTAC Filter Regulator, NPT 1/2 in 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 GFR400-15ANWT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 400-size body with a 1/2 in NPT port. This configuration carries the W grade 5 um filter element for finer filtration than the standard 40 um element, an automatic drain that expels collected condensate without manual attention, and a standard regulator with a setting range of 0.15-0.9 MPa (20-130 psi). No gauge is fitted in this version, and no reverse/check valve is fitted. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits 200/300/400 sizes; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um (W) filter grades, gauge and thread options, and bracket configurations. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application on request.
| Model | GFR400-15ANWT AirTAC Filter Regulator, NPT 1/2 in |
|---|---|
| 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 | 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 | 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard 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 clean, regulated air to the clamping and tool-change circuits of a CNC machining centre, where the 5 um element helps protect precision valves from fine particulate and the automatic drain keeps condensate off the shop floor without operator attention.
Conditioning the air feeding conveyor diverters and carton-sealing cylinders on a packaging line, with the regulator holding a steady downstream setting so cylinder stroke behaviour stays consistent through the shift.
Serving as the point-of-use filter regulator at an assembly cell air drop, combining water and particle removal with pressure regulation in one body and one 1/2 in NPT connection instead of two separate components.
Sizing a GFR400-15ANWT starts with the port and size step: 400 size with a 1/2 in NPT port sits mid-range in the GFR family, so match it against the flow your line actually needs. The decodable choices are the drain type (this unit has an automatic drain; manual and differential-pressure drains are the alternatives), the filter grade (5 um here versus the standard 40 um), the thread (NPT as ordered; PT is the standard thread and G is also a catalogue option), the gauge (none fitted here; gauge and scale options exist), and the bracket (included in this version). Flow for the G-series is published as curves, not a single rating, so ask us to confirm sizing against your application and the datasheet 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 state a rated flow, Cv or SCFM number. Tell us your line conditions and required flow, and we will confirm the sizing against the datasheet on request before you order.
The A in the code GFR400-15ANWT selects the automatic drain, which expels collected condensate from the bowl on its own; manual and differential-pressure drains are the other catalogue choices. The N selects no gauge, so no pressure gauge is fitted on this version - gauge options with different scales are available in the family if you want one.
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.