The AirTAC GFR40010AF3TK AirTAC Filter Regulator NPT3/8 Auto Drain 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 automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR40010AF3TK is a size 400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 in NPT port, an automatic drain that expels collected condensate without manual attention, a standard 40 um filter element, a PC (polycarbonate) bowl, an embedded square gauge scaled in bar, and a reverse/check valve fitted to hold downstream pressure. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulator adjusts from 0.15-0.9 MPa (20-130 psi); operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, drain types, 40 um or 5 um (W) filtration, gauge scale, PT/G/NPT thread and bracket options. Rated flow for this series is published as curves rather than a single figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR40010AF3TK AirTAC Filter Regulator NPT3/8 Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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 0.15 - 0.9 MPa (20 - 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 3 | Gauge scale: bar. 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) |
Clean, regulated air feeding tool-clamp cylinders and pneumatic actuators on a machining centre, with the automatic drain handling condensate from a long shift without operator attention.
Conditioning and regulating the air that drives divert gates, pushers and sealing jaws on a carton or bagging line, with the check valve holding set pressure during upstream dips.
Point-of-use filtration and pressure control for grippers, filler heads and capping heads on a bottling line, with the bar-scale square gauge giving operators a clear setpoint readout.
Size 400 with a 3/8 in port suits lines whose air demand sits in the upper mid-range of the G-series; step up to size 600 or down to 300 depending on the flow curve for your consumption. The automatic drain on this unit is the right choice where the bowl is mounted in a hard-to-reach position or where condensate loads make manual draining impractical; manual and differential-pressure drains remain available in the family. The standard 40 um element covers general plant air protection, while the 5 um (W) grade is the option for finer downstream needs. The fitted square gauge reads in bar; MPa and psi scales and an external round gauge are alternatives. PT is the standard thread, with G and NPT as order options, and a bracket is included for panel or surface mounting. Because flow for this series is published as curves rather than a single rating, send us your air demand and we will confirm sizing against the datasheet 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 the GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your air demand and line pressure and we will confirm the sizing from the datasheet on request.
The K code means a reverse/check valve is fitted, which holds downstream pressure if the upstream supply drops. The A code means an automatic drain, so collected condensate is expelled from the PC bowl without manual intervention - useful where the unit is mounted out of easy reach.
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.