The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in NPT Square Gauge 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 differential-pressure 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 at your set point, in a single body. This configuration is size 300 with 3/8 in NPT ports, standard 40 um filtration, a differential-pressure drain on the PC (polycarbonate) bowl, an embedded square gauge scaled in bar, and a reverse/check valve fitted (code K); no mounting bracket is included (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the setting range is 0.15-0.9 MPa (20-130 psi).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, automatic or manual drain variants, an optional 5 um (W) filter grade, and G (BSPP) or NPT thread options to order - PT is the standard thread. Working temperature is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in NPT Square Gauge |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding clean, pressure-stable air to carton-sealing and case-erector cylinders on a packaging line, where the 40 um element keeps debris out of valve spools and the regulator holds a steady set point for consistent jaw and clamp action.
Supplying filtered, regulated air to workholding clamps and swing cylinders on a CNC fixture line, with the check valve helping hold the downstream circuit if upstream supply dips mid-cycle.
Conditioning air for diverter and pusher gates on a distribution conveyor, where the 3/8 in NPT connection suits the manifold feed and the square bar gauge lets technicians verify set pressure at a glance during shift checks.
Size and port set the air capacity: stay at 300 with 3/8 in NPT for mid-size lines, step up to 400 or 600 where the circuit demands more air, or down to 200 for compact points of use. Drain choice matters: this unit uses the differential-pressure drain (default), with automatic (A) and manual (M) variants available in the series. Filtration is 40 um standard; specify 5 um (W) where downstream components need finer protection. The embedded square gauge here reads in bar (scales are 1 MPa, 2 psi, 3 bar), the K code adds a reverse/check valve, and J means no bracket - order one separately if you mount to a panel or wall. Thread is NPT on this unit; PT is the standard and G (BSPP) is a catalogue option. Because flow is published as curves rather than a single rated figure, send us your flow and pressure requirements 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 GFR series as curves rather than a single rated figure, so we do not quote a Cv, l/min or SCFM number. Tell us your required flow and working pressure and we will confirm the sizing against the datasheet before you order.
The GFR300-10 carries the T code, which is NPT. PT is the standard thread across the G series, and G (BSPP) is available as a catalogue option to order - specify the suffix when you request a quote. These are specification choices, not delivery promises.
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.