The AirTAC GFR400-10 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is fitted with a 3/8 in PT port, the standard 40 um filtration grade and a differential-pressure drain that bleeds collected condensate automatically as flow passes through. It is the low-pressure (L) type, intended where the working pressure must be set below the standard regulator band. A round external gauge scaled in psi is fitted so the set pressure is visible at the unit, and no mounting bracket is supplied with this configuration.
This is a genuine AirTAC part from the GFR400 series. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is ordered with a choice of drain type, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT thread, bracket and reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in 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 | Differential-pressure 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. 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). |
| 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) |
On a press or jig fixture where workpieces must be held at a gentle, closely watched pressure, this low-pressure GFR filters the supply, holds the reduced setting and shows it live on the fitted psi gauge.
Feeding the pick-and-place and sealing cylinders on a packaging conveyor, the unit strips water and 40 um particulate from the shop air and keeps the regulated supply steady across the shift.
On a bench rig running sensitive pneumatic instruments, the GFR400-10 cleans the compressed air line and lets a technician dial in and read a low regulated pressure directly at the panel.
Size the unit by the port and flow step: this 400 size carries a 3/8 in PT port, one step up from the 300 series, so step up if your line's flow demand sits above what a smaller body passes. Choose the drain to match access: differential-pressure (as fitted here) drains with flow, automatic (code A) drains on its own, and manual (code M) needs someone to open the bowl. The 40 um grade fitted here is the standard element; specify W if you need the 5 um option. Gauge style and scale (round or square; MPa, psi or bar) and thread (PT standard, G or NPT to order) are selectable, as is the bracket. Flow for this family is published as curves, not a single rating, so send us your application details and we will confirm sizing against the datasheet before you order.
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 number here. Tell us your line pressure and the flow your application needs and we will confirm against the datasheet whether this 400 size with its 3/8 in port is correctly sized before you order.
The L in GFR40010LJC2 marks the low-pressure regulator type, intended for settings below the standard band; the exact range for this type is not published, so ask us to confirm it for your setpoint. The drain is the differential-pressure type (the default): it expels collected condensate as air flows through, with no manual intervention, and the 40 um element is the standard filtration grade.
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.