The AirTAC GFR400-10T AirTAC Filter Regulator NPT3/8, 40 um 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 AirTAC GFR400-10T 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, the standard 40 um filter element, and a differential-pressure drain that bleeds condensate automatically whenever the pressure differential across the element is high enough, so no manual draining routine is needed. A round pressure gauge with a psi scale is fitted for direct set-point reading, a reverse/check valve is fitted to hold downstream pressure when upstream supply is lost, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT, G or NPT thread, manual, automatic or differential-pressure drains, a 5 um element option, and gauge scale choices. Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10T AirTAC Filter Regulator NPT3/8, 40 um |
|---|---|
| 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 | 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 | Differential-pressure 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 2 | Gauge scale: psi. 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Clean, regulated air feeding tool-changer clamps and pneumatic actuators on a machining centre, with the check valve holding the clamp circuit if shop air dips.
Point-of-use preparation ahead of carton-forming and sealing cylinders on a packaging conveyor, where the psi gauge lets line staff verify set pressure at a glance.
Regulated air to a clamping manifold on an assembly press, with the 40 um element protecting directional valves from water and particulate carryover.
Step up or down through the size range (200/300/400/600) to match the port size and flow duty of your circuit; this size 400 unit carries a 3/8 in port. Choose the drain to suit access: differential-pressure (this unit) needs no attention, automatic drains on a timer-free basis, and manual suits attended installations. The standard element is 40 um; specify the W option for 5 um where finer filtration is needed. Gauge scale can be MPa, psi or bar, and the thread can be PT (standard), G or NPT - this unit is NPT. A bracket is included; a J-code variant omits it.
Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm the sizing against 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 the GFR series as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow and datasheet figures for this unit on request before you order.
The differential-pressure drain discharges collected condensate automatically when the pressure drop across the 40 um element rises, so no manual draining is required. If you prefer, the GFR400 is also available with an automatic (A) or manual (M) drain - note that the regulation range differs by drain type: 0.15-0.9 MPa (20-130 psi) for automatic and differential-pressure drains, and 0.05-0.9 MPa (7-130 psi) for manual drain.
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.