The AirTAC GFR40010MLNTK AirTAC Filter Regulator NPT 3/8 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 AirTAC GFR40010MLNTK is a size 400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is ordered with a 3/8 in NPT port, a manual drain bowl in polycarbonate, the standard 40 um filter element, the low-pressure regulator type, a built-in reverse (check) valve, and a mounting bracket. No gauge is fitted, so downstream pressure is read at the machine's own instrumentation.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR40010MLNTK AirTAC Filter Regulator NPT 3/8 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
Feeds and regulates the clamp cylinders on a milling or drilling fixture, filtering line water and scale before it reaches the clamp valve manifold while holding steady regulated pressure on the workpiece.
Sits at the air inlet of a cartoning or wrapping line, cleaning the supply and regulating it for the diverters, seal jaws and blow-off nozzles, with the check valve holding the circuit against backflow.
Prepares air for the grippers and small cylinders on an automated assembly cell, removing condensate and particles ahead of the directional valves and delivering regulated pressure to the actuators.
Size 400 with a 3/8 in NPT port sits in the middle of the GFR range; step up or down (200/300/400/600, ports 1/8 in to 1 in) to match the air demand of the circuit. Drain choice matters: manual drain needs an operator to bleed the bowl, while automatic and differential-pressure drains discharge condensate on their own. Filtration is 40 um as standard here; specify code W for 5 um where finer protection is needed. This unit is the low-pressure regulator type, carries a reverse (check) valve, includes a bracket, and ships without a gauge - gauge and scale can be selected on other variants. Thread is NPT on this code; PT is the catalogue standard and G (BSPP) is also available to order. Because flow is published as curves rather than a single rating, 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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for this size 400 unit on request before you order.
The M in the code selects a manual drain: condensate collected in the polycarbonate bowl is released by operating the drain by hand, so it suits installations where someone checks the bowl as part of routine maintenance. If you prefer automatic or differential-pressure draining, those variants exist in the same GFR400 size.
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.