The AirTAC GFR40010MLJF2WG AirTAC Filter Regulator G3/8, 5 um 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR40010MLJF2WG is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This GFR400 configuration is built around a G3/8 (BSPP) port, a 5 um filter element (the finer of the two published grades), a manual-drain bowl in polycarbonate, and an embedded square gauge reading in psi. It is the low-pressure regulator variant, is supplied without a mounting bracket, and has no reverse/check valve fitted.
This is a genuine AirTAC part. The GFR family covers sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because flow for this family is published as curves rather than a single rating, we confirm the datasheet and sizing figures on request.
| Model | GFR40010MLJF2WG AirTAC Filter Regulator G3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Fitted at the drop feeding a pneumatic press or clamping fixture, it cleans the shop air to 5 um and holds a stable reduced pressure to the cylinder so clamping force stays consistent from cycle to cycle, with the psi gauge giving a visible setpoint.
On the air line feeding a paint-spray booth or coating gun, the 5 um element and manual-drain bowl keep water and grit out of the finish while the regulator sets the atomising pressure the gun was specified for.
Mounted ahead of the valve manifold on a packaging or bottling line, it strips condensate and particulate before the directional valves and regulates supply to the actuators, with the square gauge letting operators verify the line setting at a glance.
The meaningful choices on this unit are all decodable from the code. Size 400 with a G3/8 port sits in the middle of the GFR range - step up to size 600 or down to 300/200 as your line's flow demand dictates, matching the port to your existing pipework. The 5 um element (code W) suits air feeding sensitive valves, cylinders or instruments; the standard 40 um element is enough for general shop-air protection. A manual drain means someone bleeds the bowl on a routine walk-round - automatic or differential-pressure drains are the alternatives where the unit is hard to reach. The fitted square gauge reads in psi; round gauges and MPa or bar scales are orderable options, as are G versus NPT threads and the mounting bracket this variant omits. Flow is published as curves, not a single rated figure, so ask us to confirm sizing against your application before ordering.
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 family as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and sizing data from the datasheet on request.
The L marks the low-pressure regulator variant, intended where the controlled pressure sits below what the standard type targets. The exact adjustment range for this variant is not published in the catalogue we transcribe from, so we confirm it on request; maximum inlet pressure remains 1.0 MPa (145 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.