The AirTAC GFR400-10 AirTAC Filter Regulator, PT3/8, 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is fitted with a PT3/8 (3/8 in) port, the standard 40 um filter element, and an automatic drain that expels collected condensate without manual attention. The built-in regulator adjusts from 0.15 to 0.9 MPa (20-130 psi) and carries an embedded square gauge scaled in psi, with an external round gauge available as an option. A reverse/check valve is fitted, a mounting bracket is included, and the polycarbonate bowl is rated to the family maximum inlet pressure of 1.0 MPa (145 psi) over a working temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, drain types (differential-pressure, automatic, manual), filter grades (40 um standard, 5 um optional), gauge scales (MPa, psi, bar) and G or NPT thread options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR400-10 AirTAC Filter Regulator, PT3/8, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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, 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Filtered, regulated air at the machine inlet keeps spindle clamps, tool changers and pneumatic actuators working on clean, stable pressure, with the automatic drain handling condensate between shifts.
Feeding pick-and-place and carton-sealing cylinders on a packaging conveyor, this unit sets a fixed working pressure and stops water and debris reaching the valve island downstream.
At a bench or cell drop from the main ring main, the filter regulator gives each station its own pressure setting and local moisture removal, with the check valve holding the set pressure if supply dips.
Choose the size by the port and flow step: size 400 with a PT3/8 port sits in the middle of the GFR range (200/300/400/600), so step up or down if your line uses a different port. Pick the drain to suit access: automatic drain (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure is the default. Filter grade is 40 um standard for general air preparation, or 5 um (code W) where finer filtration is needed. The square gauge on this unit is scaled in psi; MPa and bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT as order options; a mounting bracket is included.
Flow for this series is published as curves, not a single rated number, so please 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. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
The A in the code gives an automatic drain: condensate collected in the polycarbonate bowl is expelled without anyone opening it, which suits unattended installations. The K code means a reverse/check valve is fitted, which helps hold the downstream setting if upstream supply pressure drops.
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.