The AirTAC GFR400-10 AirTAC Filter Regulator NPT3/8 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 AirTAC GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is threaded NPT3/8 (3/8 in), carries a 5 um filter element for finer filtration than the standard 40 um grade, and has an automatic drain that expels collected condensate without manual attention. The fitted square gauge reads in psi, so set pressure can be checked at a glance, and the standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi), with an operating temperature range of -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size, and no mounting bracket is fitted on this variant.
This is a genuine AirTAC part. The GFR series is available in 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, and can be ordered with manual, automatic or differential-pressure drains, a 40 um or 5 um element, square or round gauges in MPa, psi or bar scales, G, NPT or PT threads, and with or without a bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator NPT3/8 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 | 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 — square, psi 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. |
|---|---|
| 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Installed on the compressed-air drop feeding a CNC machine's pneumatic tool-changer and clamping circuit, where the 5 um element protects close-tolerance valves from particulate and the automatic drain keeps condensate out of the supply without a daily bowl check.
Mounted ahead of the cylinder bank on a carton-forming and sealing conveyor, giving the line a single point where clean, regulated air at a set psi feeds the diverters and pushers and the square gauge lets a technician verify setting at a glance.
Fitted at the point of use on an assembly plant's air ring main, stepping main-header pressure down to the level the hand tools and fixtures need, with the automatic drain handling moisture that carries over from the distribution piping.
Choose the size and port step against the air demand of the circuit: this 400-size unit with NPT3/8 ports sits in the mid-to-upper range of the GFR line, which steps up to the 600 size with larger ports for higher demand. This configuration pairs the 5 um element (code W) with an automatic drain - the right choice where finer filtration is wanted and the bowl should empty itself; the 40 um standard element and manual or differential-pressure drains are the alternatives. The fitted square gauge reads psi; round external gauges and MPa or bar scales are options. NPT is the thread on this code; PT is the standard thread and G (BSPP) is also a catalogue option. No bracket is fitted on this variant; bracketed versions exist.
One honest note before ordering: AirTAC publishes filter-regulator flow as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the datasheet and check the sizing against your required flow before you order.
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 quote a flow number. Tell us your application and required flow and we will confirm the datasheet and check that this 400-size, NPT3/8 unit is correctly sized before you order.
The code GFR40010AJF2WT decodes A as an automatic drain, which ejects collected condensate on its own instead of waiting for a manual bowl drain, and W as the optional 5 um filter element instead of the standard 40 um grade. Choose automatic drain where the unit is not checked daily, and 5 um where downstream equipment needs finer filtration.
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.