The AirTAC GFR300C15ALJF2G AirTAC Filter Regulator G1/2 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 GFR300C15ALJF2G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit is specified with a G1/2 (BSPP) port, the low-pressure regulator type, a 40 um standard filter element, an automatic drain, an embedded square gauge reading in psi, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl keeps collected condensate visible, and the automatic drain discharges it without manual attention.
This is a genuine AirTAC part. The GFR family 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 finer 5 um element (code W), alternative gauge scales (MPa, psi or bar), G or NPT threads and a mounting bracket. Because flow is published as curves rather than a single rating, ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C15ALJF2G AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR300 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 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 | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Filtering shop air and stepping it down to the gentle pressure a pneumatic clamp or swing cylinder needs, with the automatic drain clearing condensate between cycles and the psi gauge giving the operator a local setpoint.
Paint lines call for steady, reduced pressure at the gun. This unit filters the compressed supply and lets a finisher set the low-pressure band at the point of use, with the auto drain handling compressor moisture.
Feeding filtered, regulated air to the low-pressure actuator circuit of a cartoning or wrapping line, where the square psi gauge supports local setting and the automatic drain protects downstream valves from water carryover.
Size 300 with a G1/2 port is the mid-range step in the GFR line; move to size 400 or 600 when the circuit needs a larger port and more flow, and down to 200 for compact drops. This unit carries the automatic drain (code A); manual (M) and differential-pressure (blank default) drains are orderable on the same series. The 40 um element is standard here, and the 5 um grade (code W) suits circuits that need finer filtration. The fitted square gauge reads in psi; MPa and bar scales are available. Thread is G (BSPP) on this unit - PT is the catalogue standard and NPT is an order option - and no bracket is fitted, though one can be ordered. This is the low-pressure regulator type; its exact adjustment range is not published in our data, so confirm it with us against your set pressure. Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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 GFR300 flow as curves rather than a single rated figure, so we do not quote a number. Send us your required flow and working pressure and we will confirm sizing from the datasheet on request.
Code A on this unit is the automatic drain, which discharges collected condensate from the bowl without manual attention. The GFR300 series is also orderable with a manual drain (code M) or the differential-pressure drain (blank, the default). Tell us which variant you want and we will confirm the details 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.