The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in NPT, 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 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 size-400 filter regulator that removes water and particulate from compressed air and holds downstream pressure steady, all in one body. This configuration is built for 3/8 in NPT ports, filters to 5 um for cleaner air than the standard 40 um element, drains condensate automatically, and is fitted with a reverse/check valve so downstream pressure is held if the supply drops. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, an external round psi gauge is fitted, and the polycarbonate bowl carries a maximum inlet pressure of 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drain, 40 um or 5 um filtration, gauge style and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in NPT, 5 um |
|---|---|
| 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 | 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. |
| (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. |
| 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 the pneumatic clamps and tool-change actuators on a machining centre, where the 5 um element protects precision valves and the regulator holds a fixed clamp pressure through the shift.
Sits at the drop point of a packaging conveyor line, filtering and regulating the air that drives pushers and diverters so the actuators see clean, steady pressure all day.
Serves as the point-of-entry unit for a robotic assembly cell, combining water and particle removal with set-and-forget regulation and automatic condensate draining that needs no operator rounds.
Size 400 with a 3/8 in 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. Choose the 5 um element (this model) when downstream valves, cylinders or instruments need cleaner air than the 40 um standard. The automatic drain here empties the bowl without operator attention - pick manual drain only where an operator is always on hand, or differential-pressure drain where you want draining tied to the pressure drop across the element. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the other catalogue options. NPT is the thread on this unit, with PT and G available to order, and the mounting bracket is included.
Flow for this family is published as curves, not a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the sizing against the datasheet before you order.
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 rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and the flow your equipment needs, and we will confirm the sizing against the datasheet before you order.
The A in the code gives an automatic drain, which expels collected condensate from the bowl on its own - the right choice for unattended cells or hard-to-reach mounting points. Manual drain suits stations an operator visits regularly, and differential-pressure drain ties draining to the pressure drop across the element. All three are catalogue options across the GFR family.
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.