The AirTAC GFR300-10 AirTAC Filter Regulator NPT 3/8 in, 5 um 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 regulates downstream pressure in a single body. This configuration is the 300 size with a 3/8 in NPT port, a 5 um filter element for finer filtration than the standard 40 um grade, and an automatic drain that expels collected condensate without manual attention. The set outlet range is 0.15-0.9 MPa (20-130 psi), an embedded square gauge reading in psi is fitted, and a reverse/check valve is included to hold downstream pressure if the supply drops. Maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits this 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread form (PT standard, G and NPT as order options) and bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator NPT 3/8 in, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Feeding tool-clamp and chip-clearing actuators on a machining centre: the 5 um element protects the precision valves from fine particulate, the regulator holds a steady clamp pressure, and the check valve keeps the circuit pressurised through brief supply dips.
On a packaging line running diverters, stoppers and pusher cylinders, this unit cleans and regulates the air at the drop point; the automatic drain handles condensate on a line that runs unattended across shifts.
At a bench or pallet station where clamps and small air tools share one drop, the 3/8 in NPT port and 300-size body suit multi-tool take-offs, the psi gauge lets operators set and verify working pressure, and the 5 um grade suits sensitive pneumatic tooling.
Size and port: the 300 frame with a 3/8 in NPT port sits mid-range in the GFR line (200/300/400/600); step up or down according to the flow your line needs, and confirm the flow curve with us before ordering. Drain: this unit has an automatic drain, which suits unattended or hard-to-reach installations; manual and differential-pressure drain versions exist if you prefer periodic or load-proportional draining. Filtration: the 5 um element (code W) is finer than the 40 um standard grade - choose it where downstream valves and cylinders need cleaner air. Gauge: the embedded square gauge here reads in psi; MPa and bar scales, and an external round gauge, are available as options.
Other decodable choices: thread is NPT on this unit (PT is the standard; G and NPT are order options), the reverse/check valve (code K) is fitted, and this J-coded version comes without a mounting bracket - a bracket is available if you need panel or surface fixing. We do not quote a single rated flow because AirTAC publishes flow only as curves; ask us to confirm sizing against your application.
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 number, so we do not quote a figure here. Contact us with your line pressure and required downstream flow and we will confirm the datasheet curve and check the sizing for your application before you order.
The A in the code means the bowl drain expels condensate automatically when it accumulates, so no one has to bleed the bowl by hand. That suits unattended equipment, enclosed cabinets or units mounted where they are hard to reach. Manual-drain and differential-pressure-drain versions of the same GFR300 filter regulator are available if you prefer those arrangements.
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.