The AirTAC GFR400-10G AirTAC Filter Regulator 3/8 in 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 differential-pressure 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 combines two jobs in one body: it removes water and particulate from compressed air and regulates downstream pressure. This configuration is the 400 size with G3/8 (BSPP) ports, a 40 um standard filter element, and a differential-pressure drain that uses the pressure difference across the unit to eject collected condensate. The regulator is the low-pressure (L) type, and the code confirms an embedded square gauge reading in psi, a built-in reverse/check valve, and no mounting bracket. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details against your application before ordering.
| Model | GFR400-10G AirTAC Filter Regulator 3/8 in Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | Differential-pressure 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. 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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) |
Feeding conditioning air to looms and spinning frames where a low-pressure regulated supply keeps jets and guides working with clean, water-free air.
Mounting ahead of directional valves and cylinders on a food or carton conveyor line, filtering condensate and holding steady downstream pressure.
Supplying workholding clamps on a machining fixture, where the check valve helps hold the set downstream circuit and the 40 um element protects the clamp seals.
Start with the port step: the 400 size carries 3/8 in ports, and larger sizes move more air - match the size to the flow your line needs rather than to the pipe alone. Drain choice matters: this unit uses the differential-pressure drain (blank code); automatic (A) and manual (M) drains are order options. The 40 um element is the standard grade; specify W for the 5 um optional element. This is the L low-pressure regulator version - its exact regulation range is not published, so confirm it with us. The square gauge reads in psi; MPa and bar scales are alternatives. Threads come as PT (standard), G or NPT, and a mounting bracket can be ordered where the J no-bracket code does not suit your panel.
Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing from the datasheet before you order.
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 as curves, not as a single rated number, so we do not quote a figure here. Send us your application details and we will confirm the flow and full datasheet figures for this exact configuration on request.
L marks the low-pressure regulator type. The exact regulation range for the low-pressure version is not published in the catalogue, so we confirm it on request; the standard GFR range and the psi square gauge on this unit are as coded.
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.