The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8 Low-Pressure 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 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 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size-400 unit with a PT3/8 (3/8 in) port, a 5 um filter element (code W), manual drain, low-pressure regulator type, an external round gauge reading in psi, a reverse/check valve fitted, and no mounting bracket. The polycarbonate bowl lets you see collected condensate at a glance. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. GFR filter regulators are available in sizes 200, 300, 400 and 600, with ports from 1/8 to 1 inch and options covering drain type, 40 um or 5 um filtration, gauge style and scale (MPa, psi or bar), PT, G or NPT threads, and brackets. 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 PT3/8 Low-Pressure 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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, 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (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. |
| (blank) | PT 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) |
Filtered, regulated air for hold-down clamps on a CNC fixture, where the low-pressure type keeps the clamp circuit steady and the 5 um element protects the clamp valve from particulate.
Conditioning the air feed to sealing-bar and cutter cylinders on a packaging machine, with the manual drain bled at shift start and the psi gauge giving operators a readable setpoint.
Supplying clean, regulated air to spray guns and atomising valves in a paint or coating booth, where the 5 um grade helps keep the finish free of water and debris.
Step between sizes 200, 300, 400 and 600 to match your porting and the flow your line needs; this unit is size 400 with a 3/8 in PT port. Choose the drain to suit attendance: manual drain (this unit) for installations where an operator can bleed the bowl on a routine, automatic or differential-pressure drain for unattended runs. The 5 um element (code W) gives finer filtration than the 40 um standard where downstream components need cleaner air. The round gauge reads in psi; an embedded square gauge and MPa or bar scales are the alternatives. A reverse/check valve is fitted, and no mounting bracket is included - bracketed versions are available. PT is the standard thread; G (BSPP) and NPT are order options. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application 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 GFR flow as curves, not as a single rated figure, so we do not quote a flow number. Send us your application details and we will confirm the datasheet curve and correct sizing for your port and flow requirement before you order.
The M in GFR400-10MLJC2WK means the condensate bowl is drained by hand. Manual drain suits attended installations where an operator can bleed the bowl on a routine. If the unit runs unattended, ask about the same size with an automatic or differential-pressure drain instead.
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.