The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8 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 400-size body with a PT3/8 (3/8 in) port. This unit is the low-pressure type, so it is intended for circuits that run at reduced regulated pressure rather than full line pressure. It carries the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and an embedded square gauge scaled in psi so operators can read and set the downstream pressure directly. The polycarbonate bowl suits 200/300/400 sizes, and the J code means no mounting bracket is fitted.
This is a genuine AirTAC part in the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, thread options PT, G (BSPP) and NPT, filter grades of 40 um standard or 5 um (code W), manual or automatic drain alternatives, gauge scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8 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 — 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. |
| 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. |
| (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) |
Feeding pneumatic cylinders and grippers on a packaging conveyor where product-handling motions run at reduced regulated pressure, with clean, moisture-reduced air and a psi gauge for operator setting.
Supplying air clamps and hold-downs on a fabrication cell that must not over-clamp delicate workpieces, using the low-pressure regulator type to hold a reduced set pressure downstream of the main line.
Conditioning shop air for laboratory apparatus or a test bench that needs particulate- and water-filtered air regulated down to a gentle, repeatable pressure, read directly on the square psi gauge.
Start with the port step: this unit is 400 size with a 3/8 in PT port, so check that it matches your line size and the flow your circuit needs - larger sizes carry more flow, and we can confirm curve data against your demand before you order. The low-pressure type (code L) is the key choice here: pick it when your process runs at reduced regulated pressure; the exact regulation range for the low-pressure variant is not published, so confirm it with us. Drain is differential-pressure as standard; a manual-drain (M) or automatic-drain (A) version can be ordered if your installation cannot rely on flow to clear the bowl. Filter grade is the 40 um standard element; specify W if you need the 5 um grade. The gauge here is the embedded square type with a psi scale; MPa or bar scales and an external round gauge are alternatives. Thread is PT as standard, with G (BSPP) and NPT available to order, and the J code means you may want to add a bracket for panel or wall mounting.
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 number, so we do not quote a figure here. Tell us your line pressure and the air demand of your equipment and we will confirm the flow and datasheet figures for the GFR400-10 against your application before you order.
The L in GFR40010LJF2 marks the low-pressure regulator type, intended for circuits that run at reduced regulated pressure rather than full line pressure. The exact adjustment range for the low-pressure variant is not published, so contact us and we will confirm it from the datasheet. The gauge on this unit is the embedded square type scaled in psi.
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.