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 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: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 300-size unit is fitted with a 3/8 in NPT port, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain on the polycarbonate bowl, an embedded square gauge scaled in MPa, a reverse/check valve, and a standard regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as catalogue options, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and gauge or no-gauge builds. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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. |
| 1 | Gauge scale: MPa. 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) |
Feeds a bench-mounted pneumatic press or clamp cylinder circuit: the 5 um element protects the valve and cylinder seals from water and fine particulate, while the regulator holds the working pressure the tooling was set up for.
Serves the air cylinders and grippers on a cartoning or case-packing conveyor line, where the check valve helps hold the set downstream pressure against supply-side fluctuation between machine cycles.
Conditions the compressed air feeding analytical or test-bench instruments that need clean, moisture-reduced air at a stable, manually set pressure, with the MPa gauge giving a clear local reading at the panel.
Choose the size and port against the air demand of the circuit: this 300-size unit carries a 3/8 in NPT port, and the GFR range steps up through 400 and 600 for larger flows. The 5 um element in this build suits air that feeds sensitive components; the standard 40 um grade is available where coarser protection is enough. The differential-pressure drain bleeds the bowl automatically as flow passes, with automatic and manual drain builds offered as alternatives. The embedded square MPa gauge is standard here, an external round gauge is optional, and MPa, psi and bar scales can be specified. NPT is the thread on this unit; PT is the catalogue standard with G and NPT as orderable options, and a mounting bracket can be added if required.
Because flow is published as curves rather than a single rated figure, we do not quote a number here. Send us your application details and we will confirm the sizing and datasheet figures 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, not as a single rated number, so we do not state a figure here. Send us your application details and we will confirm the flow and datasheet figures for this 300-size, 3/8 in NPT unit before you order.
K indicates that a reverse (check) valve is fitted, allowing downstream air to be held rather than venting back through the unit if the upstream supply drops. It is an option on GFR units; builds without the K code have no check valve.
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.