The AirTAC GFR400-10 AirTAC Filter Regulator NPT3/8, 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 GFR400-10 is an AirTAC GFR-series filter regulator: a 5 um filter element and a pressure regulator combined in one body, so the compressed air is cleaned of water and particulate and then reduced to the working pressure in a single unit. This configuration is size 400 with a 3/8 in NPT thread, a 5 um element (the finer of the two grades), an automatic drain that expels collected condensate without operator attention, a round pressure gauge reading in psi, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi), the regulating range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT to order) and bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR400-10 AirTAC Filter Regulator NPT3/8, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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 | Not fitted |
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). |
| 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. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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) |
Feeding filtered, regulated air to the tool-clamp and actuator circuits of a CNC machining centre, with the 5 um element protecting directional valves and cylinders from particulate and the automatic drain handling condensate through the shift.
Point-of-use conditioning at a spray-booth or paint-line drop, where clean air at a steady regulated pressure supports finish quality at the gun and the automatic drain keeps the bowl clear without daily manual attention.
Supplying the stopper, pusher and lift cylinders on a packaging or bottling conveyor line, with the regulator holding a constant working pressure and the round psi gauge giving operators a local setpoint readout.
The real choices in this family are the size and port step, the drain, the filter grade, the gauge and the thread. Size 400 with a 3/8 in NPT port suits circuits that need more flow than the 200/300 sizes; step up to 600 or down to 300 to match the port step to the flow your line demands. Drain: automatic (this unit) empties the bowl on its own; manual needs operator attention; differential-pressure drains on a set pressure drop. Filter grade: 40 um standard, 5 um (this unit, code W) for finer protection of downstream valves and instruments. Gauge: this unit carries a round external gauge with a psi scale; embedded square gauges and MPa or bar scales are the other catalogue options. Thread: PT is the catalogue standard; G (BSPP) and NPT are order options - this unit is ordered in NPT. Bracket included. Flow is published as curves, not a single rating, so send us your flow and pressure requirement and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes G-series flow as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your required flow and working pressure and we will confirm the figures against the datasheet on request before you order.
The automatic drain expels collected condensate by itself, so the unit suits lines that run unattended; manual and differential-pressure drains are the other catalogue options. The 5 um element (code W) filters more finely than the 40 um standard, which is the right choice where downstream valves, cylinders or instruments need finer protection.
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.