The AirTAC GFR400-10 AirTAC Filter Regulator, NPT 3/8 in, 5 um 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 size 400 filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is threaded 3/8 in NPT, carries the fine 5 um filter element (code W) for cleaner air than the standard 40 um grade, drains collected condensate by hand via the manual drain, and includes a reverse/check valve (code K). Outlet pressure is set across the 0.05-0.9 MPa (7-130 psi) range that applies to the manual-drain version, read on the fitted round gauge with MPa scale. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size; only the 600 size uses an aluminium alloy bowl. No mounting bracket is fitted (code J).
This is a genuine AirTAC part. The GFR filter-regulator line is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT (standard), G or NPT thread, differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge style and scale options, and an optional low-pressure regulator type. Flow for this series 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, NPT 3/8 in, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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 — round, MPa 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Point-of-use conditioning for a machining centre's pneumatic valves and actuators: the 5 um element keeps fine contaminants out of the control circuit while the regulator sets a stable working pressure for tool clamping and tool-change cylinders.
Feeding the air cylinders that push, divert and stop product on a packaging conveyor: the GFR400-10 filters the shop air to 5 um and holds the set pressure the diverter cylinders were sized for, with the manual drain emptied during shift checks.
Clean, regulated air for a lab bench running pneumatic sample handlers and small process instruments: the 5 um grade and reverse/check valve protect sensitive downstream devices, and the MPa gauge lets technicians verify the set point at a glance.
Size 400 with a 3/8 in port sits in the middle of the GFR range: step up to 600 or down to 300/200 depending on the flow your line needs - we confirm the published flow curves against your demand before you order. This unit already carries the fine 5 um element (W); the standard grade is 40 um if your application does not need the finer filtration. Manual drain (M) means an operator drains the bowl by hand - choose automatic or the differential-pressure default if nobody is at the machine regularly. The fitted round gauge reads in MPa; psi and bar scales and an embedded square gauge are the other catalogue options. Thread here is NPT; PT is the standard and G is also available to order. Bracket: none fitted (J). Then the honest routing: because flow is published as curves, not a single rating, ask us to confirm sizing against the 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 GFR400 series as curves, not as a single rated number, so we do not quote a figure that is not in the datasheet. Tell us your line pressure and the air demand of your equipment and we will confirm the flow and sizing figures from the datasheet on request before you order.
The M code means condensate collected in the polycarbonate bowl is drained by hand, so the unit suits installations that are checked on a regular schedule; automatic or differential-pressure drains are the catalogue alternatives where unattended operation matters. The W code fits the 5 um element instead of the 40 um standard, which is the right choice when downstream valves, cylinders or instruments need cleaner air.
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.