The AirTAC AirTAC GFR40010MLF1WTK Filter Regulator 3/8 in NPT 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 AirTAC GFR40010MLF1WTK is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 3/8 in NPT port, a 5 um filter element (the finer of the two published grades), a manual drain on the polycarbonate bowl, a low-pressure regulator type, an embedded square gauge with an MPa scale, and a reverse/check valve fitted. 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 is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulator types, gauge and scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | AirTAC GFR40010MLF1WTK Filter Regulator 3/8 in NPT |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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 — square, MPa 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding clean, pressure-controlled air to the tool-change and clamping circuits of a machining centre, where the 5 um element protects fine valves and the low-pressure regulator type holds a modest setpoint.
Conditioning the air that drives conveyor gate cylinders and carton-forming actuators on a packaging line, with the manual drain emptied as part of the shift checklist.
Supplying regulated, filtered air to bench-top process or test equipment in a laboratory skid, where the reverse/check valve holds the downstream circuit if the supply is interrupted.
Size 400 with a 3/8 in port sits in the middle of the GFR range; step up to size 600 or down to 200/300 depending on the pipe size and flow your line carries - we will confirm the flow curve against your demand before you order. The 5 um element (code W) suits points where finer particulate matters; the 40 um standard grade is the economical choice for general supply. The manual drain means an operator opens the bowl drain periodically; choose automatic drain if the unit is in a position that is hard to reach. The low-pressure regulator type is selected where the controlled pressure sits at the lower end of the scale - the exact adjustment range for this type is not published in the catalogue sheet we hold, so confirm it with us. The square gauge is embedded and reads in MPa; external round gauges with MPa, psi or bar scales are available. NPT is the thread on this code; PT is the standard and G (BSPP) is also orderable. A mounting bracket is included.
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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the air demand of the equipment you are feeding, and we will confirm the sizing from the datasheet before you order.
The M in the code selects a manual drain: an operator opens the bowl drain to expel collected water, which suits units mounted where they are easy to reach; automatic and differential-pressure drains are available on other codes. The L selects the low-pressure regulator type, intended for controlled pressures at the lower end of the range - the exact adjustment range for this type is not published on our sheet, so confirm it with us.
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.