The AirTAC GFR40010MLF2GK 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 GFR40010MLF2GK is an AirTAC GFR400 filter regulator: a 400-size unit that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a G3/8 (BSPP) port, a manual drain for emptying the PC (polycarbonate) bowl, a 40 um standard filter element, and the low-pressure (L) regulator type. An embedded square gauge scaled in psi is fitted, a reverse/check valve (code K) 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. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including automatic or differential-pressure draining, a 5 um element (code W), alternative gauge scales, and G or NPT threads in place of the PT standard. Flow for this series is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application on request.
| Model | GFR40010MLF2GK 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. |
| (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. |
| 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) |
Feeding clamping cylinders on a pneumatic assembly fixture that closes at reduced pressure, with the fitted reverse/check valve in the circuit and the 40 um element keeping water and scale out of the valve seats.
Regulating air to paint spray guns in a finishing booth, where coatings call for a steady, lower-than-line setting and the filter section stops moisture and pipe scale from spoiling the finish.
Supplying film-sealing and tucking cylinders on a packaging conveyor, with the manual-drain bowl emptied at shift change and the psi gauge letting operators check the set point at a glance.
Choose the size by the port and flow your line needs: 400 sits in the middle of the GFR range, here delivered as a 3/8 in G-thread port; larger sizes carry larger ports and more flow. Drain choice matters: this unit is manual drain, so the bowl is emptied by hand - automatic and differential-pressure draining are available on other variants. The 40 um element is standard; specify code W for 5 um filtration. The embedded square gauge on this model reads in psi; MPa and bar scales and an external round gauge are options. Threads come as PT as standard, with G (this model) or NPT as order options, and a mounting bracket is included. Because flow is published as curves rather than a single rated figure, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow curve and sizing from the datasheet on request.
This is the L (low-pressure) variant of the GFR400, so its adjustment range differs from the standard type and the exact range for this variant is not published in the catalogue - we confirm it on request. Maximum inlet pressure is 1.0 MPa (145 psi) and the unit operates from -5 to 70 C, non-freezing.
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.