The AirTAC GFR300-10 AirTAC Filter Regulator, PT3/8, 5 um, Auto Drain is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This unit is built on the 300 size with a PT3/8 port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, and an automatic drain that expels collected condensate without manual attention. It is the low-pressure type, fitted with an external round gauge scaled in psi and a reverse/check valve, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The bowl on this size is polycarbonate. Because rated flow is published only as curves rather than a single figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator, PT3/8, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| W | Filtering grade 5 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a paint-spray booth line, the GFR300-10 filters compressor air to 5 um and holds the low, steady pressure that spray guns need, with the psi-scaled round gauge giving operators a direct reading at the gun manifold.
On a bottling line, this unit conditions the air feeding gripper and pusher cylinders, removing water and particles and regulating pressure so actuators cycle consistently through each shift, while the automatic drain keeps condensate from building without operator rounds.
On a laboratory pneumatic test bench, the 5 um element protects sensitive gauges and test fixtures from particulate and water, while the low-pressure regulator and psi gauge let technicians set and read test pressures, with the check valve holding the setting if upstream supply dips.
Size and port: the 300 frame with a PT3/8 port sits mid-range in the GFR line; step up to 400/600 or down to 200 depending on the air your line needs - ask us to check the published flow curves against your demand before ordering, since AirTAC publishes flow as curves rather than a single rating. Filtration: this unit carries the 5 um element (code W) instead of the standard 40 um grade - choose 5 um where downstream valves or instruments need cleaner air. Drain: an automatic drain is fitted here; manual and differential-pressure drains are the other catalogue choices. Gauge: an external round gauge scaled in psi is fitted; the embedded square gauge with MPa, psi or bar scales is the standard alternative. Thread: PT is standard on this code, with G (BSPP) and NPT available to order. A mounting bracket is included.
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 series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and air demand and we will confirm the flow from the datasheet for this exact configuration before you order.
The 5 um element (code W) filters more finely than the standard 40 um grade, which suits downstream valves, cylinders and instruments. The automatic drain expels collected condensate on its own, so the bowl does not need manual draining - manual and differential-pressure drains are the alternative catalogue choices.
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.