The AirTAC GFR40010MLJF3TK AirTAC Filter Regulator NPT3/8 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 GFR40010MLJF3TK is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air with the standard 40 um element, then regulates downstream pressure. This configuration is the low-pressure type, fitted with an embedded square gauge scaled in bar, a manual drain bowl in polycarbonate, a reverse/check valve, and NPT 3/8 in ports. With no mounting bracket supplied, it is intended for direct line installation where the piping itself carries the unit.
This is a genuine AirTAC part in the GFR400 size family, which spans the G-series sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, drain choices, 40 um or 5 um filtration, gauge styles and scales, and PT, G or NPT threads. Because flow is published as curves rather than a single rating, we confirm the datasheet and flow figures for your application on request.
| Model | GFR40010MLJF3TK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
On a CNC fixture line that holds workpieces with low-pressure air clamps, this filter regulator cleans the supply of water and swarf-carrying particulate and holds the reduced clamp pressure steady, with the bar-scaled square gauge letting the setter read the setting at a glance.
In a paint or coating booth where atomizing air must be clean and gently regulated, the 40 um element protects the spray nozzle from condensate and particles while the low-pressure regulator trims the atomizing pressure; the manual drain is emptied during shift checks.
On a packaging line driving light-duty pneumatic cylinders and actuators, this unit filters the shop air and regulates it to the low pressure the actuators require, with the reverse/check valve helping hold the downstream circuit if the supply is interrupted.
Choose the GFR400 size step against the flow your line needs: 400 sits above 300 and below 600, with 3/8 in NPT ports on this model. This unit is the low-pressure type, so select it where the working pressure sits below the standard regulator's range; the exact adjustment range for the low-pressure version is not published, so ask us to confirm it before ordering. The 40 um element is the standard grade; a 5 um element (code W) is available if finer filtration is needed. The manual drain means an operator opens the bowl drain periodically, which suits attended installations; automatic or differential-pressure drains suit unattended duty. The square gauge is scaled in bar here, with MPa or psi scales and an external round gauge as alternatives. PT is the standard thread; G and NPT are catalogue options ordered by suffix, as on this NPT model. A bracket is omitted on this code (J).
Flow for this family is published as curves, not a single rated figure, so send us your application details and we will confirm sizing against the datasheet before you order.
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, not as a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Send us your line pressure and demand and we will confirm the flow figures from the datasheet for your application on request.
The L in the code marks the low-pressure regulator type, intended for circuits working below the standard regulator's range; the exact adjustment range for this version is not published, so confirm it with us before ordering. The M in the code is the manual drain: the bowl collects separated water and an operator drains it by hand at intervals, which suits attended installations rather than fully unattended duty.
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.