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 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 filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is the size 400 unit with a PT3/8 (3/8 in) port, the low-pressure regulator type, and the fine 5 um filter element (code W) instead of the 40 um standard element. It drains automatically, so collected condensate is expelled without anyone opening the bowl, and it carries the embedded square gauge scaled in psi. The polycarbonate bowl suits the -5 to 70 C (non-freezing) operating range, a mounting bracket is included, and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, standard or low-pressure regulation, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures against 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 | 0.15 - 0.9 MPa (20 - 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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. 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure 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. |
| 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. |
| (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) |
A low-pressure GFR400-10 supplies filtered, regulated air to clamp cylinders on a carton sealing line, where the low-pressure regulator type matches circuits that run well below full line pressure and the automatic drain keeps condensate out of the valves.
The 5 um element strips water and fine particulate ahead of spray guns or coating applicators, while the regulator holds a steady setpoint so finish quality does not drift with supply pressure swings.
Filtered, regulated air feeds air knives or nozzles clearing dust and debris from products on a conveyor; the automatic drain and psi-scaled gauge let the line run unattended at a stable, repeatable pressure.
Step up through the GFR sizes (200, 300, 400, 600) as your port and flow demand grows; this size 400 unit lands on a PT3/8 connection. Choose the drain to match maintenance habits: automatic (as here) for unattended condensate removal, manual where an operator checks the bowl, or the differential-pressure default. Pick the 5 um element (this unit) when downstream valves or instruments need finer air than the 40 um standard. The square gauge is fitted and scaled in psi here; MPa and bar scales and an external round gauge are alternatives. Thread is PT as standard, with G and NPT orderable; a bracket is included.
Because catalogue flow is given as curves and not one rated number, send us your line pressure, downstream demand and this model, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your supply pressure and downstream demand and we will confirm the datasheet curve and sizing for the GFR400-10 on request before you order.
The 'A' sets the automatic drain, so condensate in the bowl is expelled without manual attention. The 'L' marks the low-pressure regulator type, intended for circuits that operate below the standard regulator range. The suffix also decodes the square psi gauge (F2) and the 5 um filter element (W); the port is PT3/8 and a mounting bracket is included.
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.