The AirTAC GFR400C10ALJC2G AirTAC Filter Regulator G3/8, 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 See datasheet 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 GFR400C10ALJC2G is a GFR400-series filter regulator: one body that removes water and particulate from compressed air and holds a reduced, regulated downstream pressure. This configuration uses the size 400 body with a G3/8 (BSPP) port, an automatic drain that clears collected condensate without manual attention, the standard 40 um filter element, and a polycarbonate (PC) bowl. The regulator is the low-pressure (L) type, ordered where the downstream setting sits below what the standard regulator is intended for; its exact setpoint range is confirmed with the datasheet on request. An external round gauge with a psi scale is fitted so the setting can be read directly, and this code is supplied without a mounting bracket.
This is a genuine AirTAC part. The G-series filter regulator line spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options that include manual or differential-pressure drains, a 5 um (W) element, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because flow is published as curves rather than a single rating, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR400C10ALJC2G AirTAC Filter Regulator G3/8, Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT 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 — factory standard, Factory standard 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. 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. |
|---|---|
| C1 | Port size See datasheet. 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). |
| (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. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Spray booths and coating heads run on air set to a low, steady pressure. This low-pressure filter regulator cleans the supply of water and particulate and holds the setting at the gun inlet.
Blow-off nozzles over a conveyor clear dust and droplets from bottles and cartons. The unit filters the air and regulates the low pressure the air knife is set to, with the automatic drain handling condensate.
Directional valves and small cylinders on packaging machinery need clean air at a stable, reduced pressure. A filter regulator at the machine drop does that job without adding oil mist.
Every choice in this code is decodable. Size 400 with a G3/8 port sits in the middle of the 200/300/400/600 range - step up or down according to the flow your line needs, and ask us to confirm the flow curve against your application before ordering, since AirTAC publishes flow as curves rather than a single rated figure. Drain is automatic here; manual (M) and differential-pressure (blank) versions exist if you prefer manual blowdown or a drain tied to pressure drop. The element is the standard 40 um grade; specify W for the 5 um option where finer particulate capture matters.
This unit carries the low-pressure regulator type (L) rather than the standard type - confirm its setpoint range with us before ordering. The round gauge is fitted with a psi scale (MPa and bar scales are the alternatives), the thread is G (BSPP), with PT as the standard thread and NPT available as an order option, and this code is supplied without a bracket.
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 this 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 relevant flow-curve and datasheet figures on request before you order.
L marks the low-pressure regulator type, ordered where the downstream setting sits below what the standard regulator is intended for. The exact setpoint range for the low-pressure version is not published in the standard table, so we confirm it with the datasheet on request. The rest of the code decodes normally: automatic drain, 40 um element, round psi gauge, G3/8 thread, and no mounting bracket.
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.