The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in NPT, 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 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 size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 in NPT port, an automatic drain that expels collected condensate without operator attention, standard 40 um filtration, and a fitted embedded square gauge reading in bar. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), 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 the 300 size, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options include 5 um (W) filtration, manual or differential-pressure drain, PT or G thread, alternative gauge scales in MPa or psi, and a bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in NPT, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT 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, bar 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Conditions and regulates the air feeding a workshop pneumatic press, filtering water and swarf from the shop line and holding a stable set pressure at the cylinder inlet. The automatic drain suits a press cell that runs unattended between shifts.
Feeds clean, regulated air to the grippers and sealing jaws on a packaging conveyor line. The 40 um element protects directional valves from particulate, and the bar-scale square gauge gives operators a visible setpoint at the machine frame.
Sits in the air preparation drop feeding a CNC machining centre's tool-change and clamping circuits, delivering filtered air at a fixed regulated pressure. The 3/8 in NPT port matches typical machine-tool supply drops and the automatic drain handles condensate from a shared compressor ring main.
Start with the port and size: the 300 size with a 3/8 in NPT port is the right step when your line's flow demand sits between the smaller 200/08 units and the larger 400/15 units; we confirm exact sizing against the published flow curves before you order. Choose the drain to match access: automatic (this code) suits unmanned or hard-to-reach installations, manual suits attended stations, and differential-pressure drain is the catalogue default. Filtration is 40 um standard; specify the W code for 5 um when downstream components need finer protection. The gauge here is the embedded square type reading in bar; MPa or psi scales and an external round gauge are alternatives. Thread is NPT on this code, with PT standard and G (BSPP) available to order; a bracket can be added if this J-coded unit needs panel fixing.
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 GFR300 series as curves rather than a single rated figure, so we do not quote a rated number, Cv or SCFM. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet flow curves on request before you order.
The A in the code GFR30010AJF3T specifies an automatic drain, which ejects collected condensate from the bowl without operator attention - useful for unattended or hard-to-access installations. AirTAC also offers manual drain (code M) and differential-pressure drain (blank) on the GFR family; the drain type also affects the regulator adjustment range, so confirm the variant you need when ordering.
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.