The AirTAC AirTAC GFR400-10 Filter Regulator G3/8, 5 um, psi gauge 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 GFR400-10 is a filter regulator: filtration and pressure regulation combined in one body. This 400-size unit carries a G3/8 (BSPP) port, a 5 um filter element for finer water and particulate removal than the standard 40 um grade, and a manual drain for the polycarbonate bowl. The built-in standard regulator covers 0.05-0.9 MPa (7-130 psi) and an embedded square gauge graduated in psi is fitted, so downstream pressure can be read and set directly at the unit. A reverse/check valve is fitted, holding downstream pressure if the supply side drops.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including drain type, filter grade, gauge style and scale, thread form (PT standard; G and NPT to order) and bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figure for your application before ordering.
| Model | AirTAC GFR400-10 Filter Regulator G3/8, 5 um, psi gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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. |
| J | Supplied without bracket. |
| (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. |
| 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) |
Feeds filtered, regulated air to a machining centre's pneumatic tool-change and clamping circuits, with the 5 um element protecting fine valves from particulate carryover.
Sits ahead of a packaging line's valve island, holding a set downstream pressure in psi on the built-in gauge while the check valve holds the circuit if supply dips.
Prepares air for a row of actuated cylinders on a light assembly line, combining water and particle removal with regulation in one 3/8-inch drop instead of two separate units.
Size up by port and flow: this 400-size unit takes a G3/8 port; step to 200/300 for smaller lines or 600 for higher flows. Drain choice matters: manual (this unit) needs periodic bleeding, automatic and differential-pressure types drain themselves. The 5 um element (code W) suits air that is drier or feeds sensitive components; the standard grade is 40 um. The fitted square gauge reads in psi; MPa and bar scales, and an external round gauge, are alternatives. Thread is G (BSPP) here - PT is the standard form, with G and NPT as order options. A bracket is not included with this code (code J); order one if you want wall or panel fixing. Flow 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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the flow your application needs and we will confirm against the datasheet curve whether this 400-size, G3/8 unit is correctly sized before you order.
This unit's bowl has a manual drain: condensate collects in the polycarbonate bowl and is released by operating the drain by hand. It suits installations that are checked as part of a routine, or where the unit is not easily plumbed for continuous drainage. If nobody will attend the unit regularly, choose an automatic or differential-pressure drain code instead - both are available in the same size.
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.