The AirTAC GFR400-10 AirTAC Filter Regulator, 3/8 in PT, 5 um 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: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is threaded PT3/8 (3/8 in), carries the 5 um filter element (code W) instead of the standard 40 um, and has an automatic drain that expels collected condensate without manual attention. The embedded square gauge reads in psi, a reverse/check valve is fitted to hold downstream pressure, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of drain types, 40 um or 5 um filtration, and gauge scale options. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR400-10 AirTAC Filter Regulator, 3/8 in PT, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 | 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. |
| 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. |
| (blank) | PT 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 the machine's pneumatic valve stack: the 5 um element protects spools and orifices from particulate and water, while the regulator holds a stable set pressure for consistent clamping and tool-change actuation.
Filtering and regulating the air feeding conveyor stopper, pusher and diverting cylinders on a packaging line. The automatic drain keeps condensate out of the circuit without operator rounds, and the check valve holds the set pressure through brief supply dips.
Conditioning the instrument-air feed to a lab analyser or purged enclosure: the 5 um grade and regulated output give the instrument clean, steady air, with the psi gauge giving technicians a visible setpoint at the panel.
Size 400 with a 3/8 in port sits in the middle of the GFR range: step up to size 600 or down to 300/200 depending on the flow your line needs - ask us to check the flow curves against your application before ordering. The 5 um element (code W) suits air that feeds sensitive valves, cylinders or instruments; the standard 40 um element is fine for general plant air. The automatic drain is the low-maintenance choice for unattended installations; manual and differential-pressure drains are available in the family. The fitted square gauge reads psi (MPa and bar scales are alternatives), and the reverse/check valve holds set pressure if the supply drops. PT thread is standard here; G (BSPP) and NPT are order options. If you need a mounting bracket, choose a GFR400-10 variant without the J code.
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 GFR400 flow as performance curves, not as a single rated number, so we do not quote a figure here. Tell us your upstream pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code GFR40010AJF2WK selects the automatic drain, which ejects collected condensate on its own - useful where the unit is mounted in a spot nobody walks past. The W selects the 5 um element instead of the standard 40 um, for air feeding finer components. Both are standard catalogue options on the GFR family.
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.