The AirTAC GFR400-10LF2G 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 GFR400-10LF2G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This size 400 unit has a G3/8 (BSPP) port, a 40 um filter element, a differential-pressure drain on the PC bowl, a low-pressure regulator type, and an embedded square gauge scaled in psi. No check valve is fitted and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch. Options across the range include a 5 um element (code W), automatic or manual drains, G or NPT threads in place of PT, gauge scales in MPa or bar, and an external round gauge. AirTAC publishes flow as curves rather than a single rating, so ask us to confirm flow and other datasheet figures for your application.
| Model | GFR400-10LF2G 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 | 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. |
| (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. |
| (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) |
Filtering and regulating the shop-air feed to pneumatic clamps and tool-change cylinders on a CNC machining centre, with the low-pressure type suiting circuits run below standard line pressure.
Conditioning air for grippers, diverters and sealing jaws on a bottling or pouch-filling line, where the 40 um element keeps water and debris out of the directional valves.
Supplying filtered, regulated air to cylinder-driven tension rollers and doffing arms in a textile mill, with the psi-scaled square gauge giving operators a familiar readout at the machine.
Size 400 with a 3/8 in port sits mid-range in the GFR line; step up or down through 200, 300, 400 and 600 according to the air demand of your circuit, and let us check the flow curve against your application before you order. The real decodable choices on this family are drain type (differential-pressure as here, or automatic or manual), filter grade (40 um standard, 5 um with the W code), gauge scale (MPa, psi or bar) and thread (PT standard, with G or NPT as order options). This unit carries the low-pressure regulator type; its adjustment range is not published in the catalogue, so confirm it with us. A mounting bracket is included; the J-suffix variant omits it.
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. Send us your line pressure, required downstream pressure and air demand, and we will confirm the flow from the datasheet before you order.
The F2 code specifies the embedded square gauge with a psi scale; MPa or bar scales and an external round gauge are available on other variants. The drain on this code is the differential-pressure type, which expels accumulated water as the pressure differential rises; automatic and manual drains are catalogue options.
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.