The AirTAC GFR300-15G AirTAC Filter Regulator, 1/2in G, 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 GFR300-15G is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single compact body. This configuration is the 300 size with a G1/2 (1/2 in) G-thread port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in psi, and a reverse/check valve fitted. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 300 size, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, thread choices of PT (standard), G or NPT, manual or automatic drain, a 5 um element (code W) in place of the 40 um standard, gauge scale choices, and a low-pressure regulator type. Because flow is published as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-15G AirTAC Filter Regulator, 1/2in G, 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 | 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. |
| 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) |
Feeding a workshop air press or clamp cylinder circuit: the GFR300-15G cleans water and scale out of the 1/2 in drop leg and holds a steady set pressure so cycle force stays repeatable, while the check valve keeps the circuit pressurised during brief supply dips.
On a carton sealer or wrap station fed from a shared header, this filter regulator conditions the 1/2 in branch supply, and the automatic drain keeps condensate out of the valves and cylinders without an operator stopping to bleed the bowl.
Supplying tool-clamp, chip-door or part-eject actuators on a CNC cell: the 40 um element protects directional valves from particulate, the square psi gauge gives the setter a direct reading, and the regulator holds the clamp pressure the process was set up with.
Choose the GFR300 size when your line runs 1/2 in ports and the flow curve for the 300 body covers your demand; step up to GFR400 or down to GFR200 if the curve says so - we will confirm sizing against your application before you order. This unit's automatic drain suits unattended duty; pick manual drain (code M) if you prefer controlled, scheduled drainage, or the differential-pressure default. The 40 um element is standard; specify W for the 5 um grade where finer particulate removal matters. The square gauge here reads psi; MPa and bar scales are available, and an external round gauge is optional. Thread is G here; PT is the standard offering and NPT is an order option. A bracket is included, and the fitted check valve (K) holds downstream pressure if the supply drops.
Flow is published as curves, not a single rating, so ask us to confirm the datasheet figures for 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 the GFR300 as curves, not as a single rated figure, so we do not quote a number here. Tell us your working pressure and air demand and we will confirm the datasheet flow figures and check the 300 size against your application before you order.
This configuration carries code A, the automatic drain, which ejects collected condensate on its own - useful where the unit is hard to reach or the line runs unattended. The family also offers manual drain (code M) for scheduled drainage and a differential-pressure drain as the default; the 40 um element is standard and a 5 um grade (code W) is available.
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.