The AirTAC AirTAC GFR40010ALC2WG Filter Regulator G3/8, 5 um is a genuine G-series filter regulator: water separation, 5 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 series combines water and particulate filtration with pressure regulation in a single body, so one 3/8 in connection does both jobs. This configuration is the 400 size with G (BSPP) threads, a 5 um filter element (code W) for finer cleaning than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for circuits that run below standard line pressures. An external round gauge with a psi scale is fitted so the set pressure is visible at the machine. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits this size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, and each size can be ordered with a different drain type, filter grade, gauge style and scale, thread option (PT standard, G or NPT to order) and bracket choice. Flow figures for the series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | AirTAC GFR40010ALC2WG Filter Regulator G3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 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, psi 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". |
| 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
A woodworking press that holds workpieces with air clamps running at reduced line pressure needs clean, regulated air at the cylinders. This unit filters water and chips from the shop air at 5 um, regulates it in the low-pressure band the clamps are set for, and the automatic drain keeps condensate out of the circuit during long production runs.
A paint or coating booth supplied from a compressed-air ring main needs air free of water and fine particles, or the finish shows fisheyes and streaks. Mounted at the booth drop, this filter regulator cleans the air to 5 um, holds the atomising pressure the gun is set to, and shows the setting on the round psi gauge.
Sorting and diverting stations on a bottling or carton line use short-stroke air cylinders that must run at a steady, moderate pressure to avoid product damage. This unit sits at the machine drop, removes water carried over from the compressor room, regulates the supply for the diverters, and drains condensate automatically between shifts.
Start with the port step: the 400 size carries 3/8 in ports, and moving between the 200/300/400/600 sizes changes both the port and the flow capacity, so match the size to the air demand of the circuit. On filtration, the standard element is 40 um; this unit carries the 5 um (W) element, the right choice when downstream equipment such as valves or spray equipment needs finer air. On drainage, the automatic drain fitted here removes condensate on its own, while manual and differential-pressure drains are the other catalogue options if you prefer a set-and-check or pressure-differential trigger. The regulator in this unit is the low-pressure type; its exact adjustment range is not published in the material we hold, so confirm it with us against your set pressure. Gauges are available embedded square or external round, with MPa, psi or bar scales - this unit has the round psi gauge. Thread is PT as standard with G and NPT as order options; this unit is the G (BSPP) version, and a bracket is included.
One honest note on sizing: AirTAC publishes flow for this series as curves, not as a single rated figure, so we cannot quote you a rated flow number. Send us your application details and we will confirm the datasheet and the right size 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 GFR400 series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Send us your application - the air demand of the equipment it will supply and your line pressure - and we will confirm the datasheet and check the 400 size at 3/8 in against your requirement before you order.
The L in GFR40010ALC2WG marks the low-pressure regulator type, intended for circuits that run below standard line pressures. Its exact adjustment range is not published in the material we hold, so confirm your set pressure with us and we will verify it against the datasheet. For comparison, standard-type GFR units adjust from 0.15 to 0.9 MPa with automatic or differential-pressure drains; this unit is the low-pressure variant, not that standard range.
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.