The AirTAC GFR40010MLC2 AirTAC Filter Regulator 3/8" PT 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 GFR40010MLC2 is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size 400 unit is threaded PT3/8 (3/8 in, PT standard), filters to the standard 40 um grade, and drains via a manual drain valve you open by hand. It is the low-pressure (L) regulator type for applications needing lower set pressures, and it carries a round external gauge scaled in psi so operators can read and adjust the set point directly. The polycarbonate bowl is fitted with a mounting bracket included.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200, 300, 400, 600) that step up in port size and flow capacity. Across the range you can order 5 um filtration (code W), automatic or differential-pressure draining instead of manual, square embedded or round external gauges in MPa, psi or bar scales, G or NPT threads instead of PT, and a no-bracket variant. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR40010MLC2 AirTAC Filter Regulator 3/8" PT Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 — round, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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. |
| (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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Filtering and regulating the supply to a carton-sealing line's pneumatic cylinders and grippers, with the psi gauge letting line staff verify the set point at a glance and the manual drain emptied during shift checks.
Conditioning air for a paint or coating booth where atomisation needs a lower regulated pressure; the low-pressure regulator type and 40 um filtration keep particulate and water out of the finish.
Feeding air tools and torque drivers at a workshop bench from a 3/8 in drop line, with the bracket mounting the unit to the frame and the manual drain bled off at the end of each day.
Start with the port step: this unit is 3/8 in PT, and the GFR series steps 1/8, 1/4, 3/8, 1/2, 3/4 and 1 in across sizes 200 to 600, so pick the size whose flow curve covers your demand. Drain type is a real choice: manual (this unit, lowest maintenance cost, needs someone to open the drain), automatic (drains itself), or differential-pressure (default, drains on a pressure drop). Filtration grade is 40 um standard or 5 um with code W if downstream equipment needs finer air. The gauge is an embedded square unit as standard, with this round external psi gauge as the ordered option; MPa and bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT as order options, and the bracket can be omitted with code J. Flow is published as curves, not a single rating, 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 this series as curves, not as a single rated figure, so we do not quote a number that is not in the datasheet. Tell us your application and we will confirm the flow figures and check the sizing against the curve for you before you order.
The M in the code specifies a manual drain: someone opens the valve to empty collected water. If you prefer the bowl to look after itself, the same GFR400 body is available with an automatic drain (code A) or the differential-pressure drain that is the series default; the regulator adjustment range also differs by drain type, and for this low-pressure (L) version we confirm the exact set range from the datasheet on request.
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.