The AirTAC GFR300-10 AirTAC Filter Regulator NPT3/8 Low-Pressure 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 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This 300-size unit comes with a 3/8 in NPT port, an automatic drain that bleeds collected condensate without manual attention, the standard 40 um filtration element, a low-pressure regulator type, a round gauge with bar scale, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl keeps the condensate level visible.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and the family offers manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge and thread options, and bracket choices. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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 | Low-pressure 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, 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Feeds fixture clamps that must be held at a reduced set pressure, with the automatic drain keeping condensate out of the clamp cylinders between cycles.
Conditions air for spray guns on a coating line, removing water and particulate and regulating atomizing pressure at the low settings finishing work requires.
Supplies clean, regulated low-pressure air to diverters, stop gates and small actuators along a packaging conveyor, with the bar gauge giving operators a local set-point reference.
Step up or down the size code (200/300/400/600) to match the port and flow path your line needs; this 300 size carries a 3/8 in NPT port. Choose the drain to suit attendance: automatic (this unit) needs no routine draining, manual suits attended stations, and differential-pressure is the family default. Filtration is 40 um standard; specify 5 um (code W) where downstream equipment needs finer air. The round gauge on this unit reads in bar; embedded square gauges and MPa/psi scales are the other catalogue choices. G and NPT threads are order options alongside the PT standard, and brackets are optional. Note that this is the low-pressure regulator type, intended for circuits held at reduced set pressures. Because rated flow is published only as curves, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this range as curves rather than a single rated figure, so there is no one number we can honestly quote. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
The automatic drain on this unit expels collected condensate from the polycarbonate bowl on its own, so the bowl does not need routine manual draining. The GFR family is also available with a manual drain or the differential-pressure default if your installation prefers those.
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.