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 size-400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is fitted with a 5 um filter element (the finer of the two catalogue grades), an automatic drain that expels collected condensate without manual attention, an embedded square pressure gauge scaled in MPa, and a reverse/check valve that holds the set downstream pressure if the supply is interrupted. The port is NPT3/8 (3/8 in NPT thread), the maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size; only the 600 size uses an aluminium alloy bowl. No mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family is available 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 standard or 5 um (W) filtration, square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow 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, 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. 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. |
| 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) |
Point-of-use conditioning for the pneumatic clamps, tool-change cylinders and chip-clearing jets on a CNC machining centre, with the 5 um element protecting fine valve spools and the check valve holding clamp pressure during a supply dip.
Conditioning and regulation at the drop feeding diverters, seal jaws and pusher cylinders on a food or carton packaging line, where the automatic drain copes with condensate on a line that runs unattended across shifts.
Regulated, filtered air at a workstation supplying impact wrenches, air ratchets and pneumatic screwdrivers in an automotive or appliance assembly plant, with the MPa square gauge giving operators a clear set-point reference.
Size and port set the capacity envelope: the 400 size with a 3/8 in port is the mid-large step in the GFR range, so step up to 600 or down to 300 depending on the air demand of the circuit. Drain type is a real choice here: the automatic drain on this code suits unattended or hard-to-reach installations, while manual and differential-pressure drains are the alternatives when you want drain timing under operator control. The 5 um element on this code is the finer grade; the 40 um standard element remains available if coarser protection is sufficient. The square gauge on this unit is scaled in MPa, with psi or bar scales and an external round gauge as options, and the fitted check valve holds downstream pressure on supply loss. Thread is NPT on this code, with PT (standard) and G available to order, and this code omits the mounting bracket. Flow for this family 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 there is no one rated flow number we can honestly quote for this unit. Tell us your application and required flow, and we will confirm the figures from the datasheet on request before you order.
The A in the code selects the automatic drain, which expels collected condensate from the polycarbonate bowl without operator attention - the right choice for unattended or hard-to-reach installations. The same size is also available with a manual drain or the differential-pressure (default) drain if you prefer drain timing under operator control.
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.