The AirTAC GFR400-15 AirTAC Filter Regulator NPT1/2 with Gauge 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 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/2 in NPT port, an automatic drain that ejects collected condensate without daily manual attention, the 40 um standard filter element, a round pressure gauge reading in bar, and a reverse (check) valve, with the mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulated outlet range for this automatic-drain version is 0.15-0.9 MPa (20-130 psi).
This is a genuine AirTAC part from the GFR400 series. The GFR line spans sizes 200 to 600 with ports from 1/8 to 1 in, PT, G or NPT thread options, manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, and gauge choices. Working temperature is -5 to 70 C, non-freezing, and the polycarbonate bowl suits this size. Flow is published as curves rather than a single rating, so ask us to confirm figures from the datasheet for your application.
| Model | GFR400-15 AirTAC Filter Regulator NPT1/2 with Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar scale |
| 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". |
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Point-of-use preparation ahead of pneumatic impact wrenches and clamping fixtures: water and swarf knocked out of the supply while the outlet pressure is held steady for consistent tool torque.
Conditioning the air feeding conveyor stopper cylinders and divert gates, where the automatic drain keeps condensate out of the valves during long unattended shifts and the check valve holds the circuit if supply dips.
Supplying filtered, regulated air to sample-handling actuators and small process panels, with the bar-scale gauge giving operators a clear local reading at the panel.
Size 400 with a 1/2 in NPT port is the step for lines that need more flow than the 200/300 sizes; move up or down the size ladder by port and demand. Drain type is a real choice: automatic (this unit) suits unattended duty, manual suits periodic checks, and differential-pressure is the catalogue default. Filtration here is the 40 um standard element; specify the W option for 5 um where finer protection is needed. The gauge on this code is round with a bar scale; the embedded square gauge and MPa or psi scales are the alternatives. NPT is an ordered thread option - PT is the catalogue standard and G (BSPP) is also available. Flow is published as curves, not a single rated figure, 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, not as a single rated number, so we do not quote a figure here. Tell us your line demand and we will confirm the sizing from the datasheet curves on request before you order.
The A code fits an automatic drain, which ejects collected condensate from the bowl without anyone opening it, suiting unattended or hard-to-reach installations. The catalogue alternatives are the differential-pressure drain (the default) and a manual drain for periodic draining.
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.