The AirTAC GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, No Gauge 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 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one compact body. This configuration has a 1/2 in NPT port, a 5 um filter element for finer protection than the standard 40 um grade, a differential-pressure drain on the bowl, and a built-in reverse/check valve. No gauge is fitted on this code, and the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200, 300, 400, 600) spanning ports from 1/8 to 1 in with PT, G or NPT thread options. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 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 datasheet figures for your application.
| Model | GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, No Gauge |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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. 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". |
| (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. |
| J | Supplied without bracket. |
| 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Filtered, regulated air feeding the directional valve and cylinder circuit of an air-operated press, with the check valve holding downstream pressure on supply loss.
A 5 um element protecting solenoid valves and air bearings on a machining centre's pneumatic circuits, with the 1/2 in port serving the machine's main drop.
Conditioning air at the point of use on a paint or coating line, where the 5 um grade helps keep moisture and particles out of the spray application.
Size up by port and flow demand: GFR400 with its 1/2 in port suits higher-flow branch lines, while GFR200/300 cover smaller drops. Choose the drain to match the installation: differential-pressure (this unit) bleeds condensate as conditions change, automatic drains continuously, and manual drain suits low-moisture or supervised points. Filter grade is 40 um standard or 5 um (this unit, code W) where finer particle protection matters. A gauge is not fitted here; embedded square or external round gauges with MPa, psi or bar scales can be ordered on other codes. Threads: PT is the standard, with G and NPT as order options, and a mounting bracket is optional.
Flow is published as curves, not a single rating, so 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as curves rather than a single rated figure, so we do not quote a number. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
The N in the code GFR40015JNWTK means no gauge is fitted. Gauges are an option on GFR units: an embedded square gauge or an external round gauge, each available with MPa, psi or bar scales, so order a gauge variant if you want a local downstream pressure reading.
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.