The AirTAC GFR300C15ALF2GK 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 GFR300C15ALF2GK is a size-300 GFR filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has G1/2 (BSPP) ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a low-pressure regulator type, an embedded square gauge reading in psi, and a built-in reverse/check valve (code K) that holds downstream pressure if the supply drops. A mounting bracket is included and the bowl is metal. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and can be ordered with manual or differential-pressure drains, a 5 um element (code W), alternative gauge scales (MPa/psi/bar) and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the exact flow and datasheet figures for your application on request.
| Model | GFR300C15ALF2GK 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) |
Feeds filtered, regulated air to pneumatic clamps and hold-downs on a carton-sealing line, with the check valve holding clamp pressure if the main supply dips mid-cycle.
Sits ahead of the directional valve on a bench or light-duty press, cleaning the air and holding the low set pressure the tooling calls for, with the psi gauge in the operator's line of sight.
Conditions the supply to conveyor-mounted air jets and diverters, the automatic drain clearing condensate so moisture is not blown onto product or rollers.
Start with the port step: size 300 with G1/2 ports suits lines plumbed at 1/2 inch; step up to size 400 or 600, or down to 200, to match your piping and air demand. Choose the drain to match attendance: automatic (this unit) for unattended condensate removal, manual for periodic draining, or differential-pressure as the default. The 40 um element is standard; specify code W for the 5 um grade where finer particulate protection is needed. The embedded square gauge is fitted here with a psi scale; MPa or bar scales and an external round gauge are alternatives. PT is the standard thread, with G (this unit) and NPT as order options, and a bracket is included.
One honest note before you order: AirTAC publishes flow as curves, not a single rated number, so send us your line pressure and air demand and we will confirm sizing against the datasheet before you commit.
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 GFR series as curves rather than a single rated figure, so we do not quote one number. Tell us your line pressure and air demand and we will confirm the flow from the datasheet for this exact unit before you order.
The A in the code sets the automatic drain: collected condensate is ejected without anyone opening the bowl, which suits unattended cells. The K adds a reverse/check valve, so downstream pressure is held if the upstream supply is lost. Manual-drain and differential-pressure-drain versions, and units without the check valve, are available in the same size.
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.