The AirTAC GFR300-15ALC2GK 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 PT1/2" ports, a automatic 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 GFR300-15ALC2GK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration carries a G1/2 (BSPP) port, an automatic drain that bleeds collected condensate from the PC bowl without manual attention, a standard 40 um filter element, and the low-pressure regulator type for circuits that run below standard line pressure. It is fitted with an external round gauge scaled in psi, a reverse/check valve to hold downstream pressure, and a mounting bracket.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 inch and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and the low-pressure regulation range for your application before ordering.
| Model | GFR300-15ALC2GK AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds filtered, regulated air to the vacuum generators and small cylinders of a pick-and-place cell, where the check valve helps hold the circuit steady between cycles and the automatic drain keeps condensate out of sensitive tooling.
Supplies clean, regulated air to the pusher and gate cylinders that divert bottles between lanes, with the 40 um element protecting valve spools from particles and the automatic drain coping with condensate in a humid filling hall.
Regulates supply pressure to pneumatic clamps on CNC machining fixtures, where the low-pressure type suits circuits run below standard line pressure and the psi-scaled round gauge gives operators a direct local reading.
Start with the port step: this unit is size 300 with a 1/2 inch port, so match it to your line size and let the required air demand drive whether you step up to size 400/600 or down to size 200. Drain choice matters in service: the automatic drain here suits unattended or hard-to-reach installations, while manual and differential-pressure drains are available in the same series. The 40 um element is the standard grade; specify code W for the 5 um element where finer filtration is needed. The round gauge is scaled in psi here, with MPa and bar scales offered, and the embedded square gauge is the standard alternative. Thread is G (BSPP) on this unit, with PT and NPT available to order, and the bracket is included.
One honest note on sizing: flow is published as curves, not a single rated figure, and the exact regulation range of the low-pressure type is not stated in the published data. Ask us to confirm both against your application before ordering.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as curves rather than a single rated figure, so we do not quote a number. Tell us your line pressure and the air demand of your equipment and we will confirm the correct size from the datasheet curves before you order.
The A in the code GFR300-15ALC2GK specifies an automatic drain, which discharges collected condensate from the PC bowl without operator attention - useful for unattended or hard-to-reach installations. The same GFR300 series is also available with manual or differential-pressure drains if you prefer a different service arrangement.
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.