The AirTAC GFR400-10 AirTAC Filter Regulator G3/8 Auto Drain psi Gauge 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 one body. This configuration has a G3/8 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a built-in square pressure gauge reading in psi, and a reverse/check valve fitted. It is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits sizes 200-400; only size 600 uses an aluminium alloy bowl.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200, 300, 400, 600) with port sizes from 1/8 to 1 inch and options including manual or differential-pressure drains, a 5 um filter element (code W), alternative gauge scales, and PT or NPT threads on request. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR400-10 AirTAC Filter Regulator G3/8 Auto Drain psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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. |
| 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding cleaned, pressure-regulated air to a pneumatic press or clamping fixture on a fabrication line, with the check valve holding the set pressure against supply dips and the automatic drain handling condensate between shifts.
Conditioning air for conveyor diverters, case sealers and carton-forming cylinders on a packaging line, where the 40 um element protects valve spools and the psi gauge gives operators a local setpoint reference.
Serving as the point-of-use filter regulator on a CNC machine tool or machining centre, regulating air to tool changers and coolant sprays while the automatic drain keeps moisture out of the downstream circuit.
Size the GFR400-10 by stepping port size against the air demand of the circuit: 3/8 inch is the mid-range step in the GFR family, which runs from 1/8 inch (200 size) to 1 inch (600 size). Choose the drain to match attendance: automatic (this unit) for unattended duty, manual where an operator drains routinely, or differential-pressure as the default. The 40 um element is standard; specify the 5 um W grade where finer filtration is needed. The embedded square gauge reads psi here; MPa and bar scales and an external round gauge are alternatives. Threads are PT standard, with G (this unit) and NPT as order options; brackets are optional (this unit has none).
Because flow is published as curves and not as a single rated number, ask us to confirm sizing against your application and the datasheet 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 figure, so there is no one rated flow number we can quote. Ask us and we will confirm the datasheet curve and check the sizing against your application before you order.
The A in GFR40010AJF2GK selects the automatic drain, which discharges collected condensate without operator attention. The alternatives in the family are manual drain (code M) and the differential-pressure drain (blank), which is the default. Regulation range with automatic or differential-pressure drain is 0.15-0.9 MPa (20-130 psi); with manual drain it widens to 0.05-0.9 MPa (7-130 psi).
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.