The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit carries a PT1/2 (1/2 in) PT thread, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and a fitted reverse/check valve that holds downstream settings if supply is interrupted. Regulation covers 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), read on the embedded square gauge supplied with a psi scale. Operating temperature is -5 to 70 C (non-freezing), and the polycarbonate bowl lets you see the condensate level.
This is a genuine AirTAC part. The GFR family spans 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um (code W) filtration, gauge scale options, and G or NPT thread variants to order. Rated flow is published as curves rather than a single figure, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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 | 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| (blank) | PT 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) |
On a machine-shop press cell, this unit cleans the shop air feeding the clamping cylinders and holds a set working pressure so the fixture grips consistently through the shift. The check valve keeps the setting if the main supply dips.
Feeding the pusher and sealing cylinders on a carton-packaging conveyor, the 40 um element stops scale and pipe debris reaching the valve spools, while the regulator sets the pressure the packer was designed around.
At an assembly-bench air drop, the automatic drain handles condensate from the header line without operator attention, and the regulated outlet supplies hand tools and small actuators at a stable, repeatable pressure.
Size the unit by port and flow step: 300 sits mid-range with a 1/2 in PT port, so step up to 400 or 600, or down to 200, as your line demand changes. Drain choice matters in practice: automatic (this unit) suits unattended duty, manual suits periodic checks, and differential-pressure is the catalogue default. Choose the 5 um element (code W) if downstream equipment needs finer filtration than the 40 um standard. Gauge scale (MPa, psi or bar), thread (PT standard; G and NPT are order options) and the included mounting bracket complete the configuration. 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this family as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the sizing against the datasheet on request before you order.
The automatic drain ejects collected condensate from the bowl on its own, which suits unattended or hard-to-reach installations. The family also offers manual drain and the differential-pressure default, so you can match the drain to how the station is serviced.
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.