The AirTAC GFR300C15ALF2 AirTAC Filter Regulator PT1/2 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 GFR300C15ALF2 is a filter regulator: it removes water and particulate from compressed air and reduces supply pressure to a stable, lower working pressure in one body. This size 300 unit is built with a 1/2 inch PT thread, an automatic drain that expels collected condensate from the polycarbonate bowl without manual attention, a standard 40 um filter element, and the low-pressure regulator type with an embedded square gauge reading in psi. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and a mounting bracket is included.
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 including manual or differential-pressure drains, a 5 um element (code W), MPa/psi/bar gauge scales, G or NPT threads and bracket variations. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C15ALF2 AirTAC Filter Regulator PT1/2 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) |
Point-of-use conditioning for a carton-sealing or wrapping machine, where the 1/2 inch PT port taps the plant ring main and the low-pressure regulator holds a reduced working pressure for the machine's sealing and folding cylinders.
Supplying filtered, reduced-pressure air to the clamping circuit of a machining or assembly fixture, with the 40 um element protecting directional valves and the automatic drain keeping condensate out of the circuit.
Conditioning the air feed to a laboratory test or calibration bench, where the square psi gauge gives a direct readout in the units the bench is specified in and the low-pressure type suits low working setpoints.
The real choices in this family are the size and port step (200/300/400/600, 1/8 to 1 inch), matched to the air demand of your circuit; the drain type (automatic here, or manual or differential-pressure); the filter grade (40 um standard, 5 um with code W); the gauge scale (MPa, psi or bar); the thread (PT standard, G or NPT to order); and the bracket. This configuration is the low-pressure regulator type, intended where the working pressure sits well below what the standard version is set up for - we confirm its exact adjustment range on request. 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, working pressure and air demand, and we will confirm the flow from the datasheet for this exact size 300, PT1/2 configuration before you order.
The L in the code marks the low-pressure regulator type, intended where the working pressure sits well below what the standard GFR300 version is set up for. The exact adjustment range for the low-pressure type is not published in our current data, so we confirm it on request. Everything else decodes as standard: automatic drain, 40 um element, square psi gauge, PT thread and included 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.