The AirTAC GFR400-10LJF2W AirTAC Low-Pressure Filter Regulator PT3/8 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 GFR400-10LJF2W is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size-400 unit has a PT3/8 port with PT thread, and the W code specifies the finer 5 um filter element instead of the 40 um standard. The regulator is the low-pressure type (code L), and the differential-pressure drain bleeds collected condensate automatically whenever the pressure differential across the element is high enough, so no manual draining routine is needed. An embedded square gauge with a psi scale is fitted; the J code means no mounting bracket is included, and no reverse/check valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with a choice of port sizes, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um filter grades, standard or low-pressure regulation, and square or external round gauges with MPa, psi or bar scales. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR400-10LJF2W AirTAC Low-Pressure Filter Regulator PT3/8 |
|---|---|
| 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. |
| 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. |
| 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) |
Feeds a press station that runs its clamping or holding cylinders at reduced pressure. The filter stage strips water and wear particles from the shop-air drop before they reach the valve stack, while the low-pressure regulator holds the working pressure the tooling was set up for.
Sits at the inlet of a bench-scale process skid where instruments and small actuators need cleaned air at a controlled, modest pressure. The 5 um element keeps fine particulate out of sensitive pneumatic components, and the differential-pressure drain keeps the bowl clear without operator attention.
Mounted at the air-inlet panel of a cartoning or wrapping machine. It conditions the supply feeding the machine's directional valves and cylinders, the square psi gauge gives the maintenance team a visible setpoint, and the single-body filter-regulator layout saves panel space.
Start with the port step: this unit is size 400 with a PT3/8 connection, and the GFR range steps 200/300/400/600 with larger ports carrying more flow - match the size to the air demand of the circuit rather than to the pipe alone. The drain here is differential-pressure, which suits installations that are not easily reached for manual draining; automatic (code A) and manual (code M) versions exist if you prefer a set-and-forget valve or a hands-on drain. The W code selects the 5 um element; choose it where downstream equipment tolerates less particulate than the 40 um standard, and note that a finer element means more frequent attention to the bowl. The gauge is the embedded square type reading in psi; MPa or bar scales and an external round gauge are alternatives. PT is the standard thread, with G (BSPP) and NPT available as order options. The J code means no bracket - add one if the unit will not be supported by its own piping.
Flow for this series is published as curves, not as a single rated figure, so we cannot quote a number here. Send us your application details and we will confirm sizing against the datasheet curves 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 on the product page. Tell us your application - the air demand and working pressure - and we will confirm the correct size and the relevant flow figures from the datasheet on request.
W selects the 5 um filter element instead of the 40 um standard, so the air leaving the unit carries less fine particulate. The L in the code marks this as the low-pressure regulator type rather than the standard version; the exact adjustment range for the low-pressure type is not published on the sheet we work from, so ask us to confirm it from the datasheet before ordering. The unit also differs from the standard build in having no mounting bracket (J) and a square gauge reading in psi (F2).
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.