The AirTAC AirTAC GFR40010LJC2WG Filter Regulator G3/8 Low-Pressure 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 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 GFR40010LJC2WG is a size-400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the low-pressure type, fitted with the fine 5 um element (code W) instead of the standard 40 um, a differential-pressure drain that bleeds collected condensate whenever the pressure differential across the bowl rises, a round external gauge reading in psi, and a G (BSPP) parallel thread on the 3/8 in port. It carries no mounting bracket. The polycarbonate bowl suits the -5 to 70 C (non-freezing) working range, with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part in the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, standard or low-pressure regulation, gauge styles and scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | AirTAC GFR40010LJC2WG Filter Regulator G3/8 Low-Pressure |
|---|---|
| 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure 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. |
| J | Supplied without bracket. |
| (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) |
Conditioning and regulating the hold-down clamp circuit on a woodworking router, where the fine 5 um element protects quick-release cylinders and the low-pressure regulator holds a gentle, repeatable clamp force.
Feeding clean, regulated air to the pick-and-place cylinders and vacuum-assist circuits of a bottling plant labelling machine, with the psi gauge giving operators a direct local reading at the panel.
Filtering and regulating the atomising air feed to a paint-spray booth gun manifold, where the 5 um grade keeps nozzles clear of particulate and the low-pressure type suits gentle atomising pressures.
Start with the port step: size 400 on a 3/8 in G-thread connection suits lines where the required air demand sits in the middle of the G-series range; step up to size 600 or down to size 300 if your flow curve calls for it. Choose the 5 um element, as here, when downstream valves, cylinders or instruments need finer protection than the standard 40 um grade. Pick the drain to match access: differential-pressure (this unit) drains itself with flow, automatic drains on a timer-free cycle, and manual drains suit attended installations. This is the low-pressure type, intended where working pressures sit below the standard regulator band; the exact adjustment range for the low-pressure version is not published, so confirm it with us. Gauge options are the embedded square gauge or this external round gauge, in MPa, psi or bar scales. Thread is G (BSPP) here; PT is the standard offering and NPT is an order option. A bracket is optional (this unit ships without one). Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 number, so we do not state a figure here. Tell us your inlet pressure and the air demand of your application and we will confirm the sizing from the datasheet on request before you order.
The L sets this unit as the low-pressure regulator type, intended for circuits that work below the standard regulation band; the exact adjustment range for the low-pressure version is not published, so confirm it with us. The W code selects the optional 5 um filter element in place of the standard 40 um grade, a good choice when protecting sensitive valves, instruments or spray equipment downstream.
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.