The AirTAC GFR400-10 AirTAC Filter Regulator NPT 3/8 in 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 PT3/8" 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 GFR400-10 is an AirTAC filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration is built around a 3/8 in NPT port, a 5 um filter element (the finer of the two published grades), and an automatic drain that expels collected condensate from the polycarbonate bowl without manual attention. The regulator is the low-pressure type, a round pressure gauge scaled in MPa is fitted, and a reverse (check) valve is included so downstream pressure is held if the supply drops. No mounting bracket is supplied with this code.
This is a genuine AirTAC part in the GFR400 size family. Across the G-series, filter regulators are offered in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um elements, square or round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 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 sizing figures from the datasheet for your application.
| Model | GFR400-10 AirTAC Filter Regulator NPT 3/8 in 5 um Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (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 | Fitted — round, MPa 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. 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Filtered, regulated air feeding solenoid valves and gripper actuators on a robotic weld cell, where the check valve holds the downstream circuit if shop air dips and the automatic drain keeps condensate off the valves.
Point-of-use conditioning ahead of spray guns on a finishing line: the 5 um element removes water and particulate that would spoil the finish, while the low-pressure regulator sets gentle atomizing air.
Air preparation for diverters, pushers and stopper cylinders on a bottling conveyor, where continuous two-shift running makes the automatic drain and on-body MPa gauge a practical fit.
Choose the size and port by the air your line actually consumes: this 400-size unit carries a 3/8 in NPT port, and larger sizes move more flow. Drain type is a real decision - automatic (as here) suits unattended or continuous duty, manual suits periodic checks, and the differential-pressure default drains on a pressure drop. The 5 um element (code W) is the finer option over the 40 um standard; pick it where downstream equipment is sensitive. The fitted round gauge reads in MPa; psi and bar scales are available. Thread options are PT (standard), G and NPT, and a bracket can be ordered where this no-bracket code does not include one. 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 the GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and working pressure and we will confirm the sizing from the datasheet on request.
The automatic drain expels collected condensate on its own, which suits lines that run unattended or continuously; manual and differential-pressure drains are the alternatives. The 5 um element is the finer of the two published grades - 40 um is the standard - so choose this code where valves, cylinders or instruments need cleaner air. Both choices are fixed in the model code, so order the variant that matches your line.
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.