The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8 5um Low-Pressure 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 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 GFR400-10LF2W is a low-pressure filter regulator: it removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration is the size 400 unit with a PT3/8 port, a 5 um filtering element (code W), a PC (polycarbonate) bowl with differential-pressure drain, and the embedded square gauge scaled in psi. A mounting bracket is included; the reverse/check valve is not fitted.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) spanning ports from 1/8 to 1 inch with PT, G or NPT thread options. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because AirTAC publishes flow only as curves rather than a single rating, we confirm flow and other datasheet figures on request.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8 5um Low-Pressure |
|---|---|
| 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 | 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 | 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. 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. |
| (blank) | Mounting bracket included. |
| (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. |
| (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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Filtered, low-pressure regulated air for pneumatic clamps on a CNC machining cell; the 5 um element keeps water and fine particulate out of the clamp valve, and the square psi gauge gives operators a direct setpoint readout.
Conditioning shop air feeding spray guns in a finishing booth: the bowl drops out condensate and 5 um particles, while the low-pressure regulator holds a gentle, repeatable atomising pressure at the gun.
Regulated air for diverter and stopper cylinders on a carton packaging line; the differential-pressure drain bleeds collected water away as air flows, and the square gauge lets line staff verify supply pressure at a glance.
Choose the size and port step (200 through 600, 1/8 to 1 inch) against the flow your line needs; since flow is published as curves rather than a single rating, ask us to confirm sizing against the datasheet before ordering. This unit is the low-pressure type (code L); its exact adjustment range is not published, so confirm it with us. Drain options are differential-pressure (fitted here), automatic or manual; filter grade is 5 um here versus the 40 um standard; gauge scale is psi here with MPa and bar available; thread is PT as standard with G and NPT as order options, and a bracket is included.
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 GFR400 as curves rather than a single rated figure, so we do not quote one number. Send us your line pressure and the flow your application needs, and we will confirm sizing against the datasheet before you order.
The L code makes this the low-pressure regulator type; the exact adjustment range for the low-pressure build is not published, so please confirm it with us before ordering. The W code fits the 5 um filtering element in place of the 40 um standard, giving finer removal of water and particulate ahead of sensitive downstream equipment.
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.