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 AirTAC GFR400-10 is a size-400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 in NPT port, a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate without manual attention, an embedded square gauge reading in MPa, a built-in reverse/check valve, and a mounting bracket. The standard regulator adjusts outlet pressure from 0.15 to 0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits this size range; only size 600 uses an aluminium bowl.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and a choice of drain type, filter grade, gauge style and scale, thread (PT standard, G and NPT as order options), and bracket. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| 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 — square, 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 0.15 - 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). |
| F | Gauge shape: Square. 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) |
Feeding filtered, regulated air to the tool-change clamps and pneumatic actuators on a CNC machining centre, with the 5 um element protecting fine sealing surfaces and the automatic drain handling condensate through long shifts.
Supplying steady regulated pressure to the cylinders and vacuum generators on a carton-forming and sealing conveyor, where the check valve holds the set pressure if the upstream supply dips and the square gauge lets operators verify the setting at a glance.
Conditioning air ahead of the valve manifold on a robotic assembly cell, keeping water and fine particulate out of the directional control valves while the regulator holds the pressure the manifold was set up for.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up to 600 or down to 300 depending on the flow your line needs - we will check the published flow curves against your demand before you order. This unit already carries the finer 5 um element (40 um is the standard grade if your application does not need it), the automatic drain (manual and differential-pressure drains are the other options), a square MPa gauge (external round gauge optional, with psi or bar scales), and a reverse/check valve. The NPT thread is an order option; PT is the catalogue standard, and G (BSPP) is also available. A bracket is included.
Honest sizing note: AirTAC publishes flow for this family as curves, not a single rated number, so ask us to confirm the flow figure and full datasheet for your operating conditions 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 rather than a single rated figure, so there is no one rated flow number we can quote. Send us your line pressure, downstream demand and allowable pressure drop, and we will confirm the flow figures from the datasheet for your application on request.
The W code in GFR40010AF1WTK selects the 5 um filter element instead of the standard 40 um grade, which suits applications with sensitive valves or instruments downstream. The A code selects the automatic drain, which ejects collected condensate on its own so the bowl does not need manual draining. A manual or differential-pressure drain is available on other configurations if you prefer.
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.