The AirTAC GFR400-10 AirTAC Filter Regulator G3/8 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is the size 400 unit with a G3/8 (BSPP) port, a 5 um filter element for finer filtration than the standard 40 um grade, and an automatic drain that expels collected condensate without manual attention. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and a round external gauge with a psi scale is fitted so the set pressure can be read directly. A reverse/check valve is fitted, and the polycarbonate bowl is suited to the -5 to 70 C (non-freezing) operating range. Maximum inlet pressure is 1.0 MPa (145 psi).
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 G, NPT or PT thread, manual, automatic or differential-pressure drains, 40 um or 5 um filtration, and gauge or no-gauge options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator G3/8 5 um Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 — round, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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. |
| G | G (BSPP) 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) |
Positioned at the drop to a machining centre's pneumatic circuit, the 5 um element and pressure regulation protect tool-change cylinders and clamping vices from water carry-over and supply swings.
Feeding the diverters, sealers and pusher cylinders on a packaging conveyor, the GFR400-10 holds a steady working pressure while the automatic drain keeps condensate out of the valves below.
Installed at the point of use on a factory air ring main, it conditions and regulates the supply to an assembly cell's air tools and fixtures, with the psi gauge giving operators a visible set point.
Size 400 with a G3/8 port sits in the upper-middle of the GFR range; step up to size 600 or down to size 300 depending on the flow your line needs - we can confirm the flow curves against your demand before you order. The 5 um element (code W) suits air preparation ahead of sensitive valves, cylinders or instruments; the standard grade is 40 um if coarser protection is enough. The automatic drain on this unit suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other variants.
The fitted round gauge reads in psi; embedded square gauges and MPa or bar scales are the other catalogue options. This unit has a G (BSPP) thread - PT is the standard thread and NPT is also an order option, so match the thread to your pipework. Note that this J-variant is supplied without a mounting bracket; bracketed versions exist if you need panel or wall fixing.
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 number, so we do not quote a l/min or SCFM figure. Tell us your application's flow and pressure demand and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code GFR40010AJC2WGK means the bowl drains itself automatically, which suits installations that are not checked daily. The catalogue also offers manual drains and a differential-pressure drain as order options on GFR units if you prefer a different arrangement.
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.