The AirTAC GFR40010MLJF2GK 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 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 GFR40010MLJF2GK is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one component does both jobs on the air-prep line. This configuration carries a G3/8 (BSPP) port, a 40 um standard filter element, a manual drain bowl in polycarbonate, and a low-pressure regulator type for circuits that run at reduced pressure. It is fitted with an embedded square gauge reading in psi and a reverse/check valve, and it is supplied without a mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, a 5 um (code W) element option, gauge scale choices, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40010MLJF2GK AirTAC Filter Regulator G3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 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 | 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". |
| 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. |
| (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) |
Fixture clamps and swing cylinders on an assembly cell often need air held well below full line pressure. This unit filters the shop air to 40 um, regulates it down with the low-pressure type regulator, and the square psi gauge lets the setter read the clamp pressure directly.
Paint and coating guns run best at reduced, stable pressure with clean, dry air. A filter regulator at the booth drop removes water and particulate, sets the gun pressure via the psi gauge, and the manual drain suits a booth that is bled down at shift end.
On a carton-sealing or wrapping machine, the valve island needs filtered air at a set pressure. The fitted reverse/check valve keeps the downstream circuit pressurised if the upstream supply dips, protecting the machine cycle, while the manual drain clears accumulated water at changeover.
Start with the port step: this unit is size 400 with a 3/8 in port, one step up from the 1/4 in size-300 units, so match it to the line size and the flow your circuit needs - we can check the published flow curves against your demand on request. Choose the drain to suit access: this model has a manual drain, which suits supervised installations where an operator can bleed the bowl; automatic or differential-pressure drains suit unattended lines. The 40 um element is the standard grade; specify the 5 um W-code variant if downstream equipment needs finer filtration. The square gauge here reads in psi; MPa and bar scales are available, and an external round gauge is an option. Thread is G (BSPP) on this model; PT is the standard and NPT is an order option. A bracket can be added if this no-bracket version needs panel fixing; the fitted reverse/check valve holds downstream pressure if upstream supply is lost.
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 this series as curves, not as a single rated figure, so we do not quote a number. Tell us your line pressure and the flow your circuit needs, and we will confirm the sizing against the datasheet curves on request before you order.
The M in the code specifies a manual drain: accumulated water is released by hand, which suits installations that are checked regularly. If the unit will sit unattended, the same GFR400-10 body is available with an automatic drain (code A) or the differential-pressure drain that is the series default.
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.