The AirTAC GFR40010ALNT 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 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 GFR40010ALNT is a size-400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is fitted with 3/8 in NPT ports, a 40 um standard filter element, an automatic drain that bleeds collected condensate from the PC (polycarbonate) bowl without manual attention, and the low-pressure regulator type for circuits set below standard regulator ranges. No gauge is fitted (code N), and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in. Related configurations offer a 5 um element (code W), manual or differential-pressure drains, gauge options and G (BSPP) or NPT thread variants. Because flow for this series is published as curves rather than a single rating, we confirm the datasheet and flow figures for your application on request.
| Model | GFR40010ALNT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 a low-pressure clamp circuit feeding swing clamps or power chucks on a CNC fixture, this unit filters the shop air and holds the reduced set pressure the clamps were sized for, with the automatic drain keeping condensate out of the fixture circuit.
Ahead of the valve manifold on a robotic welding cell, the 40 um element removes water and pipe scale that would score spool valves, while the regulator holds a steady reduced pressure to the weld-gun actuation circuit.
Feeding cylinders and air jets on a carton-forming and sealing conveyor, this unit gives one filtered, regulated supply point for the line, with the automatic drain handling moisture overnight when nobody is at the machine.
Step up or down through the GFR sizes (200/300/400/600) so the port and body match the flow your line needs - this size-400 unit carries 3/8 in NPT ports. Choose the drain to suit attendance on site: automatic (this model) for unattended condensate removal, manual for periodic draining, or the differential-pressure default. The 40 um element is standard; specify the W code for the 5 um grade where downstream equipment needs finer filtration. This is the low-pressure regulator type - ask us to confirm its adjustment range against your set pressure before ordering. Thread is NPT here; PT is the standard and G (BSPP) is an order option. A bracket is included; gauge variants exist on other GFR codes if you need a pressure indication at the unit.
Flow for the GFR series is published as curves, not a single rated figure, so send us your application details and we will confirm sizing against 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 rather than a single rated figure, so we do not quote a l/min or SCFM number. Send us your application details and we will confirm the flow figures from the datasheet for this 3/8 in size-400 unit on request.
The A code fits an automatic drain, which expels collected condensate from the PC bowl on its own - useful where the unit is mounted out of reach or the line runs unattended. GFR units are also available with a manual drain or the differential-pressure default, so you can match the drain to how often someone can attend the machine.
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.