The AirTAC GFR400-10T AirTAC Filter Regulator, NPT 3/8, 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 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 GFR400-10T is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body, so one unit does the job that would otherwise need a separate filter and regulator. This configuration is the size 400 frame with 3/8 in NPT female ports, a manual drain bowl in polycarbonate, a 40 um standard filter element, and the low-pressure regulator type for circuits that run at reduced set pressures. An external round pressure gauge scaled in MPa is fitted, and a mounting bracket is included.
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, and options include automatic or differential-pressure drains, a 5 um element (code W), square or round gauges scaled in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. Rated flow for this series is published as curves rather than a single figure, so ask us and we will confirm the datasheet numbers against your application.
| Model | GFR400-10T AirTAC Filter Regulator, NPT 3/8, Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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, 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". |
| 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. |
| (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) |
Pneumatic clamps and workholding fixtures on a CNC cell often hold parts best at a reduced, stable pressure. This filter regulator cleans the supply of water and particulate and lets a setter dial in and read the clamp pressure on the MPa gauge, with the manual drain bled during shift checks.
Cylinder-driven sealing, folding and ejection stations on packaging lines run at set pressures well below line supply. Feeding each station through this size 400 unit filters the air and regulates it down, while the manual drain bowl is emptied as part of routine machine care.
Bench-mounted air tools, air tables and low-pressure test rigs need clean air held at a modest, repeatable setting. This unit combines the filter and regulator in one body, includes a mounting bracket for panel fixing at the bench, and the round MPa gauge gives the operator a clear pressure readout.
Start with the port and size step: size 400 with 3/8 in NPT ports sits in the middle of the GFR range, and the right step depends on the air demand of the circuit downstream - step up to size 600 for heavier demand, down to 200 or 300 for lighter lines. Because flow is published as curves rather than one rated number, send us your application and we will confirm sizing before you order. Next, choose the drain: this unit has a manual drain, which suits positions where an operator can bleed the bowl on a routine; pick automatic or differential-pressure drain codes if the bowl is hard to reach. The 40 um element is the standard grade; specify the W code for the 5 um element where finer particulate removal matters. This is the low-pressure regulator type, intended for circuits with reduced set pressures - if you need the standard range, use the non-L GFR code. Gauge scale (MPa, psi or bar), thread family (PT standard, G or NPT to order) and the included bracket complete the choices.
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 performance curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote for this unit. Tell us the air demand and pressure of your circuit and we will confirm the datasheet curve data against your application before you order.
The M code in GFR400-10T specifies a manual drain: the bowl is emptied by hand as part of routine maintenance, which suits accessible mounting positions. The GFR family also offers an automatic drain (code A) and a differential-pressure drain (the default, blank code) for bowls that cannot be checked regularly - the same regulator body is available in those configurations.
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.