The AirTAC GFR400-10T AirTAC Filter Regulator NPT3/8 Low-Pressure is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a differential-pressure 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 GFR400-10T is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation in one body. This 400-size unit carries a 3/8 in NPT port, a 40 um filter element, a differential-pressure drain and a round pressure gauge scaled in MPa. It is specified as the low-pressure type; the exact adjustment range for that variant is not published, so ask us to confirm it against your setpoint. The polycarbonate bowl shows collected condensate at a glance, and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, a 40 um standard or 5 um (W) filter element, embedded square or external round gauges in MPa, psi or bar scales, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request before you order.
| Model | GFR400-10T AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa 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". |
| (blank) | Drain: Differential-pressure 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
On robotic weld cells, clamp cylinders often run at reduced setpoints. This unit strips moisture and mill scale from the shop air line and holds the low regulated pressure the clamp circuit needs, with the MPa gauge giving operators a visible setpoint check.
Carton sealers and case packers use air cylinders for flap folding and tape heads. A filter regulator at each machine keeps condensate and pipe scale out of the valves while holding the cylinder pressure steady through the shift.
Paint and coating booths need clean, regulated air at modest pressures at the gun-supply point. This low-pressure filter regulator removes water and particulate ahead of the line and lets the booth operator set and read the working pressure on the round gauge.
Size the unit by the port step and the flow your line needs: 400 sits in the middle of the GFR range (200/300/400/600), and this model gives you a 3/8 in NPT connection. Choose the drain to suit maintenance access: the differential-pressure drain fitted here discharges automatically as the pressure drop builds, while automatic (A) and manual (M) variants are orderable. The 40 um element is the standard grade; specify 5 um (code W) if downstream equipment needs finer filtration. This unit carries a round gauge on an MPa scale; square embedded gauges and psi or bar scales are alternatives. PT is the standard thread, with G and NPT as order options, and a mounting bracket is included. 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes G-series flow as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, setpoint and the flow your application needs, and we will confirm the sizing from the datasheet on request before you order.
Thread is an order option: PT is the catalogue standard, and G (BSPP) and NPT are available by suffix on the model code. This unit is ordered as the T (NPT) variant with a 3/8 in port. Specify the thread you need when ordering; it is a specification choice, not a delivery matter.
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.