The AirTAC GFR400C15ALJC2G 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 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 GFR400C15ALJC2G is a size 400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a 1/2 in (G1/2) threaded port. This configuration is built with the automatic drain, so collected condensate is expelled from the polycarbonate bowl without manual attention - useful on lines that run unattended. The 40 um standard element handles general-purpose air cleaning, the regulator is the low-pressure type for applications supplied well below standard line pressure, and the fitted round gauge reads outlet pressure in psi. No mounting bracket is included and no reverse (check) valve is fitted.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, a choice of automatic, manual or differential-pressure drains, an optional 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, and G (BSPP) or NPT threads as order options alongside the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR400C15ALJC2G AirTAC Filter Regulator G1/2 Auto Drain |
|---|---|
| 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) |
Feeds filtered, regulated air to the low-pressure cylinders and grippers on a case-sealing machine, with the automatic drain keeping condensate out of the bowl on a line that runs through full shifts without an operator at the unit.
Conditions the air feeding diverter gates and stop cylinders along a distribution conveyor, removing water and pipe scale upstream while the low-pressure regulator holds the gentle setting those actuators need.
Sits on the bench supply of a lab or pilot-plant air skid, filtering the house compressed air and regulating it down to the low pressure the skid's pneumatic valves and sample-handling cylinders require, with psi read directly off the round gauge.
Start with the port step: this unit is size 400 with a 1/2 in port, the right slot when your supply line is 1/2 in and your flow demand sits in the upper mid-range of the G-series ladder - step up to size 600 for larger ports, down to 300 or 200 for smaller ones. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. Choose the drain to match how the unit is serviced: automatic (this unit) ejects condensate on its own, manual needs an operator, and the differential-pressure default discharges with a set pressure drop. The 40 um element is standard; specify the W code for 5 um where finer filtration is needed. The round gauge here reads in psi; square embedded gauges and MPa or bar scales are alternatives. Thread is G (BSPP) on this unit - PT is the standard and NPT is also an order option. Brackets are optional; this configuration omits one.
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 rather than a single rated figure, so we do not quote one number. Send us your inlet pressure and required flow and we will confirm the sizing from the GFR400 datasheet on request before you order.
The automatic drain (code A) expels collected condensate from the bowl by itself, which suits unattended or continuously running installations. Manual drain needs an operator to open it periodically, and the differential-pressure default discharges only when a set pressure drop builds up. All three are catalogue choices across the GFR range; this configuration ships with the automatic drain fitted.
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.