The AirTAC GFR400-10 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 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: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one 3/8 in NPT connection does both jobs. This configuration is the size 400 unit with an automatic drain that ejects collected condensate without manual attention, a 40 um standard filtration element, the low-pressure regulator type, a round pressure gauge with MPa scale, and a reverse/check valve fitted. The polycarbonate bowl lets you see the condensate level, and the mounting bracket is included for panel or wall fixing.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, an optional 5 um element, gauge and scale choices, and G (BSPP), NPT or PT threads. Maximum inlet pressure is 1.0 MPa (145 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 | GFR400-10 AirTAC Filter Regulator, NPT 3/8, Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 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 — round, MPa 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". |
| 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). |
| 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. |
| 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) |
Fixture clamps that hold aluminium workpieces often run below full line pressure. The GFR400-10 filters the supply air and holds the reduced setting the clamp cylinders were designed for, with the check valve holding the circuit if upstream pressure dips.
Packaging lines frequently run sealing bars, label applicators and hold-downs at reduced pressure while the main drive runs higher. A filter regulator at the zone take-off cleans the air and sets the low-pressure band, and the automatic drain keeps condensate out of the valves.
Blow-off nozzles that dry bottles or trays before filling work best at a controlled, reduced pressure. This unit filters the shop air, sets the low operating pressure for the nozzles, and its automatic drain protects the station from water carryover.
Start with the port: this unit is 3/8 in NPT, one step up from the 1/4 in size 300, so choose it when your line flow needs the larger size 400 body. Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order. The drain here is automatic; the series also offers manual and differential-pressure drains if you prefer a lower-cost or operator-controlled option. Filtration is the 40 um standard element, with a 5 um element (code W) available if downstream equipment needs finer air. This is the low-pressure regulator type, so if your circuit runs at reduced pressures rather than full line pressure, this variant is the right pick - we can confirm its exact adjustment range on request. The gauge is the external round type on an MPa scale; psi and bar scales and an embedded square gauge are the other catalogue choices. Thread is NPT here, with G (BSPP) and PT available to order, and the bracket is included.
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 GFR400 series as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and line conditions and we will confirm the flow and sizing from the datasheet on request before you order.
The A in the code GFR40010ALC1TK specifies an automatic drain, which ejects collected condensate from the bowl without operator attention - useful on unmanned or hard-to-reach installations. The GFR400 series is also available with a manual drain or the differential-pressure drain as the default, and the low-pressure type (L) in this code means the regulator is built for reduced-pressure circuits; we can confirm its exact adjustment range on request.
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.