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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 steady in a single body. This configuration is built with a 3/8 in NPT port, a 5 um filter element (the finer of the two catalogue grades), a manual drain for periodic bowl emptying, an embedded square gauge reading in bar, and a reverse/check valve fitted. The polycarbonate bowl and body are rated to 1.0 MPa (145 psi) maximum inlet pressure, the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, made in size 300 with a wide range of catalogue configurations: sizes 200, 300, 400 and 600; ports from 1/8 to 1 in; differential-pressure, automatic or manual drains; 40 um standard or 5 um (W) elements; square or round gauges with MPa, psi or bar scales; and PT (standard), G or NPT threads. Rated flow for this series is published as curves rather than a single figure, 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 | 0.05 - 0.9 MPa (7 - 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 | Manual 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| 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) |
Clean, regulated air to pneumatic clamps and swing cylinders on a CNC machining cell, with the 5 um element helping protect valve spools and the check valve holding set pressure if the supply dips.
Filtered, regulated supply for stoppers, pushers and diverters on a bottling or cartoning conveyor, where the manual-drain bowl suits a line checked and drained at shift start.
Regulated instrument air for laboratory automation and pneumatic test benches, where the 5 um grade and a bar-scale gauge support repeatable low-pressure setups.
Sizing starts with the port step: size 300 carries a 3/8 in port, one step up from 1/4 in and one below 1/2 in, so match the size to the air demand of the circuit. Choose the drain to suit access: this unit has a manual drain, which the catalogue pairs with the widest regulation range (0.05-0.9 MPa / 7-130 psi) but which needs periodic bowl draining; automatic and differential-pressure drains are available on other codes. The 5 um element (code W) suits points of use that need finer air than the 40 um standard. Gauges are embedded square as standard with MPa, psi or bar scales (this unit reads bar), and an external round gauge is optional. PT is the standard thread; G and NPT are order options, and this unit is ordered in NPT. A mounting bracket is included. Because rated flow is published as curves rather than a single number, ask us to confirm sizing against your application before ordering.
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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curves and sizing for this size-300, 3/8 in unit before you order.
Code M specifies a manual drain, so the bowl is emptied by hand at intervals. The catalogue pairs manual-drain GFR units with a 0.05-0.9 MPa (7-130 psi) regulation range, versus 0.15-0.9 MPa (20-130 psi) for automatic or differential-pressure drains. If you cannot schedule draining, choose an automatic-drain code instead.
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.