The AirTAC GFR30015ALJF2GK AirTAC Filter Regulator G1/2, Auto Drain 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 series is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This GFR30015ALJF2GK is the size 300 unit with a G1/2 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in psi, a reverse/check valve fitted, and no mounting bracket. It is a low-pressure type regulator with a maximum inlet pressure of 1.0 MPa (145 psi), rated for -5 to 70 C (non-freezing), with a PC (polycarbonate) bowl.
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 can be ordered with manual or differential-pressure drain, a 5 um element (code W), MPa/psi/bar gauge scales, PT or NPT thread, and a mounting bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet for your application.
| Model | GFR30015ALJF2GK AirTAC Filter Regulator G1/2, Auto Drain |
|---|---|
| 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 — square, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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 pneumatic clamps and hold-down cylinders on an assembly fixture where delicate parts must be held at reduced pressure, with the automatic drain keeping condensate out of the fixture circuit.
Conditions and regulates air for conveyor-mounted diverters, pushers and gate cylinders on a packaging line, with the psi-scaled square gauge letting operators verify set pressure at a glance.
Provides filtered, regulated pilot air to diaphragm-actuated control valves on a process skid, with the reverse/check valve holding the pilot setting if upstream supply dips.
Start with size and port: 200/300/400/600 step up in port and flow capacity, so match the 1/2 inch port here to your line size and let us confirm the flow curve against your demand. Choose the drain to suit access: automatic (this unit) suits enclosed or infrequently attended installations, manual suits supervised points, differential-pressure drain purges on load. Filter grade is 40 um standard; specify 5 um (code W) for finer protection. The embedded square gauge here reads psi; MPa and bar scales are alternatives, and an external round gauge is optional. Thread is G (BSPP) on this unit; PT is the standard and G/NPT are order options. Brackets are optional (this unit ships without one). As a low-pressure type, its regulation range differs from the standard unit - confirm the exact range with us before ordering, since flow and range figures are published as curves, not single ratings.
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, not as a single rated number, so we do not quote a figure. Send us your line size and air demand and we will confirm the flow from the datasheet for this G1/2, size 300 unit before you order.
The L code means this regulator is the low-pressure variant rather than the standard type; its exact regulation range is not published in the sheet we work from, so confirm it with us on request. The A code means the bowl has an automatic drain, which discharges collected condensate by itself instead of waiting for a manual bleed, while the 40 um element handles standard particulate filtration.
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.