The AirTAC GFR40010MLC2WGK AirTAC Low-Pressure Filter Regulator G3/8 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 GFR40010MLC2WGK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration uses a 3/8 in G-thread port, carries the finer 5 um filter element (code W), and drains by hand through its manual drain. It is built as the low-pressure regulator type for circuits that run below standard regulator settings, with the exact adjustment range confirmed on request. The bowl on this size is PC (polycarbonate), an external round gauge reading in psi is fitted, a reverse/check valve (K) is included, and it comes with a mounting bracket.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with choices of drain type, 40 um or 5 um filtration, gauge style and scale (MPa, psi or bar), PT, G or NPT thread, and bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow for the series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR40010MLC2WGK AirTAC Low-Pressure Filter Regulator G3/8 |
|---|---|
| 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 — round, 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). |
| C | Gauge shape: Round. 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Workholding clamps on machining fixtures need clean, dry air held at a steady, moderate pressure so parts stay gripped consistently through the cycle. This unit filters the shop air to 5 um, regulates it to the clamp circuit's setting, and its check valve holds the downstream side if supply pressure dips.
Blow-off nozzles that clear dust and stray film from packs and belts run at low pressures well below standard regulator settings. The low-pressure type of this unit suits those circuits, the 5 um element protects the nozzles from particulate, and the manual drain lets an operator clear collected water at shift checks.
Positioners and pilot stages on process control valves are sensitive to dirt and moisture in the supply air. This unit conditions the pilot line with 5 um filtration and holds the pilot pressure steady, with the psi gauge giving operators a direct read of the set point at the panel.
Step the size and port to your air demand: this unit is size 400 with a 3/8 in G-thread port; move up to size 600 for heavier duty or down to 300 or 200 for lighter circuits. Drain type is a real operating choice: manual (this unit) needs an operator to open it periodically, automatic drains continuously, and the differential-pressure default drains on a pressure drop. The 5 um element (code W) is the finer option against the 40 um standard. The fitted round gauge reads in psi; the embedded square gauge with MPa, psi or bar scales is the alternative. PT is the standard thread with G and NPT as order options, and a mounting bracket is included. 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. 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 operating pressure and air demand and we will confirm the flow from the datasheet on request.
The M in the code sets a manual drain: an operator opens it periodically to release the water collected in the PC bowl. The same GFR400 size is also available with automatic or differential-pressure drains - just ask for that code variant when ordering. The 5 um element in this unit is likewise a choice against the 40 um standard.
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.