The AirTAC GFR300C15ALF3T AirTAC Filter Regulator NPT1/2 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 GFR300C15ALF3T 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 threaded NPT1/2, fitted with an automatic drain that discharges collected condensate without manual attention, a 40 um standard filter element, and an embedded square gauge reading in bar. It is the low-pressure (L) regulator variant, the polycarbonate bowl suits the -5 to 70 C non-freezing operating range, and maximum inlet pressure is 1.0 MPa (145 psi). 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 that include manual or differential-pressure drains, a 5 um element (code W), gauge scales in MPa, psi or bar, and PT, G or NPT threads - PT is the catalogue standard and this model carries the NPT option. Size 600 units use an aluminium alloy bowl. Flow is published as curves rather than a single rating, so ask us to confirm flow and datasheet figures for your application.
| Model | GFR300C15ALF3T AirTAC Filter Regulator NPT1/2 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) |
Feeding a low-pressure clamping circuit on a machining fixture: the filter section strips water and particles before they reach the clamp cylinders, and the low-pressure regulator holds the clamp pressure the fixture was designed around.
Supplying air to diverter gates and pushers on a packaging conveyor: the automatic drain handles condensate on a line that runs unattended, and the 1/2 inch NPT port matches the machine's main air drop.
Point-of-use preparation on a bottling line's low-pressure actuator section: one body does the filtering and the regulating, the square bar gauge gives operators a local pressure reference, and the included bracket mounts the unit at the machine.
This configuration is fixed at size 300 with a 1/2 inch port; if your demand sits near the top of a size, stepping up to size 400 gives a larger port and more flow capacity - we can check the flow curve against your consumption before you order. The automatic drain (code A) suits unmanned or hard-to-reach installations; choose manual where you prefer controlled periodic draining, or the differential-pressure default where a pressure drop triggers the drain. The 40 um element is the standard grade; specify W for the 5 um grade where finer filtration is needed.
The gauge on this unit reads in bar; MPa and psi scales are alternatives, and an external round gauge is optional. On threads: PT is the catalogue standard, while G (BSPP) and NPT are order options - this model is specified with NPT. Because rated flow is published only as curves, not a single number, send us your application details and we will confirm sizing from 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 application details and we will confirm the flow and sizing figures from the datasheet before you order.
It marks the low-pressure regulator type. The exact regulation range for the low-pressure variant is not published in the catalogue sheet we work from, so we confirm it on request. The rest of the decode is standard for this model: NPT1/2 port, automatic drain, 40 um element, square gauge reading in bar, and a -5 to 70 C operating range.
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.