The AirTAC AirTAC GFR400-10 Filter Regulator NPT3/8 5 um Manual 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 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 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 for finer filtration than the standard 40 um grade, a manual drain for the polycarbonate bowl, a round pressure gauge with MPa scale, and a built-in reverse/check valve that holds downstream pressure when the supply is removed. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR400 series is the largest of the four sizes (200/300/400/600) with the higher flow capacity that implies, and it is available with 40 um or 5 um filtration, differential-pressure, automatic or manual draining, square or round gauges with MPa, psi or bar scales, an optional low-pressure regulator, and G, NPT or PT 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 | AirTAC GFR400-10 Filter Regulator NPT3/8 5 um Manual Drain |
|---|---|
| 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. |
| (blank) | Mounting bracket included. |
| (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) |
Feeds clean, regulated air to tool-changer and clamping circuits on a machining centre, where the 5 um element protects precision valves from fine particulate and the check valve holds clamp pressure if the shop supply drops.
Prepares air for the cylinders and grippers on a carton sealing and taping conveyor, with the regulator set to the pressure the sealer head was designed for and the manual drain bled during shift changeover.
Conditions supply air for filler and capper actuation on a bottling line, keeping condensed water and 5 um-level dirt out of the valve stack while the round MPa gauge lets technicians verify set pressure at a glance.
Step up or down through the 200/300/400/600 sizes against the port and flow your line needs; this 400 size carries a 3/8 in port. Choose the drain to match the installation: manual (as here) when an operator can bleed the bowl on a schedule, automatic where unattended dumping is wanted, or the default differential-pressure type. Pick 5 um (this unit) over the standard 40 um element when downstream valves and cylinders need finer protection. Gauge style and scale (embedded square, or external round as fitted here, in MPa/psi/bar), thread family (PT standard, G or NPT to order), bracket inclusion and a reverse/check valve are all decodable from the code. Because flow is published as curves and not a single rated figure, send us your application and we will confirm sizing from 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 this series as curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your application and required flow, and we will confirm the appropriate size from the datasheet curves before you order.
The manual drain on this GFR400-10 means an operator opens the bowl drain to expel collected water on a planned schedule. It suits attended installations with predictable duty. If the unit will sit unattended, the automatic or differential-pressure drain options in the same series discharge condensate without manual intervention.
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.