The AirTAC GFR40010AF2WK AirTAC Filter Regulator PT3/8 5 um Auto Drain 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 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 GFR40010AF2WK is a size 400 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is threaded PT3/8 (3/8 in), carries the fine 5 um filter element instead of the standard 40 um, and drains condensate automatically, so the bowl empties itself during operation without manual attention. The fitted square gauge reads in psi, and the built-in reverse (check) valve holds the setting if upstream supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl is standard at this size, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge scale options, G or NPT thread variants, and low-pressure or check-valve options. Flow figures for this series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40010AF2WK AirTAC Filter Regulator PT3/8 5 um Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 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, 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 0.15 - 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. |
| 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) |
Feeding a workholding or clinching press cylinder: the 5 um element protects the valve stack from particulate, the regulator holds a steady clamping pressure, and the check valve keeps the setting if the main supply drops.
Supplying diverters, pushers and sealing jaws on a packaging conveyor, where the automatic drain handles condensate on an unattended shift and the psi gauge lets line staff verify set pressure at a glance.
Conditioning air ahead of spray guns and air motors in a finishing cell, where the finer 5 um grade and stable regulated pressure support consistent atomisation and the automatic drain copes with humid compressor air.
Choose the size step (200/300/400/600) against the port and the flow your line needs - the 400 size with PT3/8 suits medium-flow circuits between 1/4 and 1/2 in runs. Pick the drain to match the installation: automatic (this model) where the unit is hard to reach or runs unattended, manual where an operator drains on schedule, or the differential-pressure default. Select 5 um filtration (this model) where downstream valves and cylinders need finer air than the standard 40 um element gives. Gauge scale is selectable (MPa, psi or bar) and the square gauge is embedded as standard with an external round gauge optional. Thread is PT as standard with G (BSPP) and NPT as order options, and a bracket is included. Flow for this series is published as curves, not a single rating, so 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 rather than a single rated figure, so we do not quote one number. Tell us your application and we will confirm the datasheet flow figures for this size on request before you order.
The A in this code means the bowl drains condensate automatically during operation, which suits units mounted in awkward positions or on lines that run unattended. Manual and differential-pressure drain versions are available in the same size if you prefer scheduled or demand-based draining.
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.