The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, psi Gauge is a genuine G-series filter regulator: water separation, 40 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 size 400 unit is threaded PT3/8 (3/8 in, PT standard; G and NPT are order options). It carries a 40 um filter element, an automatic drain that expels collected condensate without manual attention, and a round pressure gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi), and the polycarbonate bowl suits operating temperatures of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options including manual or differential-pressure drains, a 5 um filter element (code W), different gauge scales (MPa, psi or bar), G or NPT threads and bracket choices. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 40 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 | 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. |
| (blank) | Mounting bracket included. |
| (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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Installed ahead of a pneumatic press station, the GFR400-10 cleans plant air of water and chips and holds a steady regulated pressure to the press cylinder, with the psi gauge letting operators read set pressure at a glance.
On packaging and cartoning lines with 3/8 in air drops, this unit filters condensate and particulate from the shop air and regulates it to the machine's valve and cylinder circuit, while the automatic drain keeps moisture out of the bowl without daily attention.
Feeding air cylinders and air tools in a robotic assembly cell, the unit combines filtration and regulation in one body to save panel space, protecting actuators from water carryover and keeping working pressure within the 0.15-0.9 MPa setting range.
Choose the size and port step against the air demand of the circuit: this is the size 400 frame with a 3/8 in PT port, one step up from the 300 series for higher-flow lines. The automatic drain on this unit suits unattended installations where condensate should be expelled without operator input; manual and differential-pressure drains remain available in the family if you prefer control or energy-saving behaviour. The 40 um element is the standard grade for general plant air; specify the W option for 5 um where downstream equipment needs finer filtration. Gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and bracket inclusion are all decodable choices. Because flow is published as curves rather than a single rating, 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. 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 here. Contact us with your application's air demand and we will confirm the datasheet flow curves and correct sizing for you before you order.
This configuration is ordered with an automatic drain (code A), which expels collected condensate from the bowl on its own - useful for unattended or hard-to-reach installations. The family also offers a manual drain (code M) where you want operator control, and a differential-pressure drain as the default. All three share the same filtration and regulation function.
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.