The AirTAC GFR40010LF2GK AirTAC Filter Regulator G3/8 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 GFR40010LF2GK is a size-400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a G3/8 (BSPP) port, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a reverse/check valve that holds downstream pressure when the supply is cut. The embedded square gauge reads in psi, and the low-pressure (L) type regulator is intended for circuits that work at reduced set pressures.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) with port options from 1/8 to 1 inch and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The 400-size bowl is polycarbonate. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request.
| Model | GFR40010LF2GK AirTAC Filter Regulator G3/8 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. |
| (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. |
| (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 filtered, pressure-controlled air to spray booths and low-pressure atomising circuits, where the 40 um element keeps water and scale out of the finish and the low-pressure regulator holds a gentle set point.
Conditioning the supply to carton sealers and wrap stations: the filter-regulator protects actuators from condensate and overpressure, and the check valve holds the circuit's pressure through brief supply dips.
Supplying bench-mounted pneumatic test rigs that run at reduced pressures, with the psi square gauge giving a direct local readout and the G3/8 port matching standard bench plumbing.
Size 400 with a 3/8 port is the right step when your line's flow demand sits above what a 300-size unit handles; match the size to required flow, then choose the thread: PT is the standard, while G (BSPP) and NPT are order options - this unit is specified with G. The 40 um element is the standard grade for general plant air; if you need finer filtration, the 5 um (W) option is available in the series. Drain choice matters: differential-pressure (as fitted here) needs no operator attention, while automatic and manual drains are alternatives. Gauge scale can be MPa, psi or bar - this unit carries the square gauge in psi. A mounting bracket is included.
Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application's flow and pressure requirements before ordering, and we will check the datasheet with you.
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 series as curves rather than a single rated figure, so we do not quote one number. Send us your required flow and working pressure and we will confirm the correct size from the datasheet before you order.
K indicates a reverse (check) valve is fitted: if the upstream supply fails, the valve holds pressure downstream so your circuit does not dump instantly. Units without the K code have no check valve. Also note the L in this code marks the low-pressure regulator type, whose exact adjustment range is not published - we can confirm it on request.
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.