The AirTAC GFR40010MF2WK AirTAC Filter Regulator PT3/8, 5 um 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 GFR40010MF2WK is a size 400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a PT3/8 port, a 5 um filter element for finer filtration than the standard 40 um grade, a manual drain for the polycarbonate bowl, and a built-in check valve that holds downstream pressure when the upstream supply is removed. The embedded square gauge reads in psi, and the standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi).
This is a genuine AirTAC part. The GFR400 series is one of four sizes (200, 300, 400, 600) with port options from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, MPa, psi or bar gauge scales, and G or NPT thread variants to order. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR40010MF2WK AirTAC Filter Regulator PT3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard 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, 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 130 psi). 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)). |
| (blank) | Standard 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. |
| 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. |
| (blank) | PT 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) |
Feeds clean, regulated air to the tool-change clamping and chuck-actuation circuits of a machining center, where the 5 um element protects close-tolerance pneumatic components and the check valve holds clamp pressure during a supply interruption.
Prepares air for the cylinders and grippers on a carton packaging line, with the regulator set to the pressure the diverter and sealing actuators need and the manual drain cleared during scheduled line cleaning.
Serves as the point-of-use filter regulator on a pneumatic press drop, delivering filtered air at a stable set pressure to the press cylinder while the psi gauge gives the operator a direct reading at the station.
Size 400 with a PT3/8 port suits lines where moderate-to-high air demand calls for a larger connection - step up or down a size if your flow requirement differs, and we will confirm the published flow curve against your application before you order. The manual drain means an operator opens the bowl drain periodically instead of relying on automatic or differential-pressure discharge, so plan a maintenance interval suited to your moisture load. The 5 um element (code W) is the finer choice over the standard 40 um grade where downstream valves and cylinders need cleaner air. The square gauge is fitted reading psi; MPa or bar scales and an external round gauge are alternatives. Thread is PT as standard with G (BSPP) and NPT as order options, and the mounting bracket is included. The fitted check valve (code K) prevents reverse flow and holds the regulated pressure upstream of the bowl when supply is shut off.
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 GFR400 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 data from the datasheet so you can size the unit correctly before ordering.
The M in the code selects a manual drain: an operator opens the bowl drain to expel collected water, rather than the bowl discharging automatically or on differential pressure. The K code adds a check valve, which blocks reverse flow and holds the regulated downstream pressure when the upstream supply is shut off.
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.