The AirTAC GFR300-10G AirTAC Filter Regulator, G3/8, 5 um, Manual 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 combines water-and-particulate filtration with pressure regulation in a single body, so one 3/8-inch (G3/8) connection does both jobs at the point of use. This configuration carries the fine 5 um filter element (code W) for cleaner air than the standard 40 um grade, a manual drain for controlled bowl evacuation, an external round gauge reading in psi, and a built-in reverse (check) valve that holds the downstream circuit when upstream supply is lost. A mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The polycarbonate bowl suits the 300 size (only the 600 size uses an aluminium alloy bowl).
This is a genuine AirTAC part from the G-series range, which spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge styles and MPa/psi/bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300-10G AirTAC Filter Regulator, G3/8, 5 um, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use filtration and regulation on the 3/8-inch supply feeding a machining centre's pneumatic clamps and tool-change circuits, with the 5 um element protecting fine valves from scale and pipe debris.
Conditioning the air ahead of conveyor stop-gate and carton-forming cylinders on a packaging line, where the check valve holds set pressure in the downstream circuit during brief upstream interruptions.
Supplying cleaned, regulated air to bench-top test rigs and analytical instruments, where the 5 um grade and a locally readable psi gauge keep the supply visible and consistent at the bench.
Step up or down through the G-series sizes (200, 300, 400, 600) against the flow your line needs - the 300 size with its 3/8-inch port sits mid-range. Choose the drain to match maintenance habits: manual drain (as here) is emptied by hand, automatic drains continuously, and the differential-pressure default drains on a pressure drop. Pick 5 um filtration when downstream valves, cylinders or instruments need finer air than the 40 um standard. Gauge style and scale are decodable: this unit has an external round gauge in psi; embedded square gauges with MPa/psi/bar scales are also available. Thread is G (BSPP) on this code, with PT as the standard and G or NPT as order options, and a mounting bracket is included. 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 the GFR300 series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application details and we will confirm the flow data from the datasheet so you can size the unit correctly before ordering.
The M in the code GFR30010MC2WGK specifies a manual drain: collected water is emptied from the polycarbonate bowl by hand, which suits installations checked on a regular maintenance round. The K specifies a built-in reverse (check) valve, which helps hold downstream pressure if the upstream supply drops. If you prefer unattended draining, the same size is available with automatic or differential-pressure drains.
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.