The AirTAC GFR40015ALJC2G AirTAC Filter Regulator G1/2, Auto Drain 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 PT1/2" 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 GFR40015ALJC2G is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 1/2 in (G1/2) unit is built around a 40 um standard filter element and an automatic drain, so collected condensate is expelled from the PC bowl without anyone having to open the drain by hand. It is the low-pressure (L) type, and it comes fitted with an external round gauge scaled in psi so operators can read and set the working pressure directly. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options, drain choices (differential-pressure, automatic or manual), a 5 um (W) element option, gauge and scale choices, and thread options - PT as standard, with G and NPT available to order. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40015ALJC2G AirTAC Filter Regulator G1/2, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) 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, 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 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. |
| (blank) | Filtering grade 40 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Installed ahead of directional valves and cylinder circuits on automated machinery, this unit filters water and particulate out of the plant air supply and holds the downstream pressure the valve stack was set up for, with the psi gauge giving the technician a direct reading at the panel.
On CNC and special-purpose machines that run dedicated 1/2 in air drops, this filter regulator conditions the supply feeding clamps, tool-changers and air-powered fixtures, with the automatic drain keeping condensate out of the bowl during unattended shifts.
For bench and pilot rigs that need air held at reduced, stable pressure rather than full header pressure, the low-pressure type regulator lets the operator dial the working setpoint down from the plant supply while the 40 um element keeps debris out of sensitive instruments.
Size and port set the capacity envelope: this unit is size 400 with a 1/2 in G-thread port, the step to take when your line runs 1/2 in piping and you want the larger GFR400 body behind it. The automatic drain (code A) suits points where the unit is not checked daily; choose manual drain where an operator prefers controlled blow-down, or the differential-pressure default where drain behaviour should follow the pressure differential. The 40 um element is the standard grade; specify the W code for 5 um if finer particulate capture is needed. The fitted round gauge here is scaled in psi; embedded square gauges and MPa or bar scales are the other catalogue choices. PT is the standard thread, with G and NPT as order options, and this J-coded version omits the mounting bracket. Because flow is published as curves rather than a single rating, 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 G-series flow as performance curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure for this unit. What we can confirm from the catalogue is the configuration: size 400, 1/2 in (G1/2) port, 40 um element, automatic drain, low-pressure regulator type and a round psi gauge, with a maximum working (inlet) pressure of 1.0 MPa (145 psi). Send us your application details and we will confirm the datasheet flow figures and correct sizing on request before you order.
The A in the code means the drain is automatic: condensate collected in the PC bowl is expelled on its own, so the unit suits installations that are not visited daily - a manual-drain version would need someone to open the drain periodically, and the differential-pressure default drains according to the pressure differential. The L code marks this as the low-pressure regulator type, intended where the working setpoint sits below the standard range; the exact adjustment range for the low-pressure type is not published in the sheet we work from, so ask us and we will confirm it 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.