The AirTAC AirTAC GFR300-10T Filter Regulator 3/8 in NPT, 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 GFR300-10T is a size 300 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration carries a 3/8 in NPT port, a 5 um filter element for finer dirt and condensate capture, an automatic drain that expels collected liquid without manual attention, and a round pressure gauge scaled in psi. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and the unit is supplied with a mounting bracket. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and is offered with 40 um or 5 um elements, differential-pressure, automatic or manual drains, embedded square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | AirTAC GFR300-10T Filter Regulator 3/8 in NPT, 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 — round, psi scale |
| Reflux valve | Not fitted |
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. |
| (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. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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) |
Feeds filtered, regulated air to the pneumatic clamps, tool-change cylinders and chip-blowing nozzles on a CNC machining centre, with the 5 um element protecting fine valve spools from dirt carried in shop air.
Sits on the air drop feeding gripper cylinders and sealing jaws on a bottling or cartoning conveyor, holding a steady set pressure so pick-and-place timing stays repeatable while the automatic drain keeps condensate out of the loop.
Conditions the air line to a spray gun in a finishing booth: the 5 um element strips water and particles that would mar the finish, and the regulator lets the operator dial in the gun supply pressure at the booth wall.
Size 300 with a 3/8 in NPT port suits lines that need more flow than the 200-series 1/4 in step without moving up to the 400 frame; match the size to your demand using the published flow curves, which we will confirm against your application on request. The 5 um element (code W) is the finer choice over the 40 um standard where downstream valves and actuators need cleaner air. The automatic drain suits unattended or hard-to-reach installations; choose manual or differential-pressure drain if you prefer operator control or energy-saving purge behaviour. The round gauge here reads in psi; square embedded gauges and MPa or bar scales are alternatives. PT is the standard thread, while G (BSPP) and NPT are catalogue options ordered by suffix, and a mounting bracket is included with this unit.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet curves on request before you order.
This GFR300-10T is ordered with an automatic drain, which expels collected condensate from the bowl without operator attention - useful for unattended or hard-to-reach installations. The catalogue also offers a manual drain and a differential-pressure (default) drain; note that the regulator adjustment range differs by drain type, with the automatic and differential-pressure versions covering 0.15-0.9 MPa (20-130 psi).
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.