The AirTAC GFR400-10 AirTAC Filter Regulator 3/8in PT Low-Pressure 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 size 400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the low-pressure type, fitted with an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an external round gauge reading in psi, and a reverse (check) valve. The 3/8 in PT port is the standard thread; G (BSPP) and NPT are available as order options. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with a choice of drain type, 40 um or 5 um (W) filtration, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator 3/8in PT Low-Pressure |
|---|---|
| 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 | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Installed at the drop feeding a production line's air header, the GFR400-10 cleans water and debris from the shop supply and holds a steady low-pressure setting for downstream tools and actuators, with the automatic drain handling condensate through continuous shifts.
On a conveyor system with pneumatic take-up rollers and product clamps, this unit filters the incoming air and regulates it to the pressure the clamp cylinders need, while the psi gauge gives operators a visible setpoint at the machine.
For a laboratory test rig or automated analytical instrument fed from a plant air ring main, the 40 um element protects sensitive valves from particulate and water, and the low-pressure regulator type suits circuits that must run well below standard line pressure.
Size 400 with a 3/8 in PT port suits lines where larger piping and higher flow capacity are needed than the 200 or 300 sizes provide; step up or down by port size against the flow curve for your circuit. The automatic drain on this unit suits unattended duty; choose manual drain where you prefer controlled, scheduled draining, or differential-pressure drain as the default. Filtration here is the 40 um standard element; specify the W option for 5 um when finer protection is required. The round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. PT is the standard thread, with G and NPT as order options, and the included bracket simplifies panel or wall mounting.
Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering. The exact regulation range of the low-pressure type is also confirmed on request.
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, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow and datasheet figures for the GFR400-10 on request before you order.
The A position selects an automatic drain, which ejects collected condensate from the bowl without manual attention - useful on unattended or continuous-duty installations. The K code means a reverse (check) valve is fitted, and the C2 code gives an external round gauge reading in psi. The bowl on this size 400 unit is polycarbonate, and a mounting bracket is included.
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.