The AirTAC GFR40010MLNWTK AirTAC 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 GFR40010MLNWTK is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is built for a 3/8 in NPT port, uses the fine 5 um filter element (code W), drains collected condensate by hand via the manual drain, and is the low-pressure (L) type for circuits that run below standard line pressure. No gauge is fitted (code N) and a reverse/check valve (code K) is included; a mounting bracket is supplied and the polycarbonate bowl suits non-freezing installations from -5 to 70 C.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um standard or 5 um fine filtration, gauge options and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi). Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR40010MLNWTK AirTAC 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 | 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. |
| 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) |
Air-prep point for clamp and fixture cylinders on a CNC cell: the 5 um element keeps spool and seal contamination down while the regulator holds the clamp circuit at its set pressure.
Feeds divert, push and gate cylinders on a packaging conveyor where the circuit runs at reduced pressure; the manual drain is emptied at shift checks and the check valve holds the setpoint against upstream dips.
Bench drop for test rigs and pilot skids that need clean, finely regulated low-pressure air; the 5 um element protects sensitive instruments and the bracket mounts the unit at the panel.
Start with the port step: this unit is the size-400 body with a 3/8 in NPT port; step up to size 600 or down to 300/200 if your line runs larger or smaller. Choose the drain to match attendance: manual (this unit) suits stations an operator visits; automatic or differential-pressure drains suit unattended lines. This unit carries the 5 um element (W) where downstream equipment needs finer filtration than the 40 um standard. It is the low-pressure (L) type, so confirm the adjustment range against your circuit before ordering. No gauge is fitted - add one if you need a visible setpoint. Thread is NPT here; PT and G are order options. A bracket is included.
Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before you order.
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 this family as curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure and the air demand of your equipment and we will confirm the sizing from the datasheet on request before you order.
The M in the code selects the manual drain: condensate is emptied by hand, which suits stations visited during routine checks. The N selects no gauge, so nothing is supplied - add a gauge if operators need to see the setpoint. The K adds a reverse/check valve and the low-pressure (L) type is confirmed in the code; we can confirm its exact adjustment 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.