The AirTAC GFR400-10AJC2WTK AirTAC Filter Regulator NPT 3/8 in 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 GFR400-10AJC2WTK is a size 400 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration is built with a 3/8 in NPT port, a 5 um filter element for finer particle removal than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a round external pressure gauge reading in psi. A reverse (check) valve is fitted, and the unit is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjustment range is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR filter-regulator line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is configurable by drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional), gauge style and scale, thread (PT standard; G and NPT as order options), bracket and reverse valve. Flow figures for this unit are published as curves rather than a single rating, so we confirm the datasheet and sizing on request.
| Model | GFR400-10AJC2WTK AirTAC Filter Regulator NPT 3/8 in |
|---|---|
| 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 — round, psi 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). |
| C | Gauge shape: Round. 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. |
| 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 ahead of a machining centre's pneumatic valves and air bearings: the 5 um element protects fine components from particles while the regulator holds a steady set pressure to the machine's air circuit.
Mounted at the drop of a packaging machine's air header, it filters condensed water and debris from the plant supply and regulates the pressure feeding cylinders and grippers, with the automatic drain handling condensate through continuous shifts.
Conditioning compressed air on a lab bench or pilot rig where cleaner, finely regulated air is needed for test apparatus and small pneumatic fixtures, with the round psi gauge giving a clear local pressure readout.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up to size 600 or down to size 300 depending on the flow your line needs - we will check the published flow curves against your application before you order, since there is no single rated figure. This unit already carries the finer 5 um element (W) versus the 40 um standard, an automatic drain, a round psi gauge and a reverse valve, so the remaining decodable choices are thread (PT is the standard; G and NPT are order options) and bracket (this code omits it). Regulation range is 0.15-0.9 MPa (20-130 psi) on this automatic-drain version.
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 GFR400 series as curves, not as a single rated number, so we do not quote a figure. Send us your line pressure, set pressure and required consumption and we will confirm the flow and sizing from the datasheet on request before you order.
The automatic drain (code A) expels collected condensate from the polycarbonate bowl on its own, so the unit suits duty where nobody drains bowls by hand. The W code selects the 5 um filter element instead of the 40 um standard, for finer particle removal. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulator adjusts 0.15-0.9 MPa (20-130 psi).
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.