The AirTAC GFR300-10ALF2WG AirTAC Filter Regulator G3/8 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 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 GFR300-10ALF2WG is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit carries a G3/8 (BSPP) port, an automatic drain that clears collected condensate without operator attention, and a 5 um filter element (the W grade, finer than the 40 um standard). The regulator is the low-pressure type, a square pressure gauge with a psi scale is embedded as standard, a mounting bracket is included, and no reverse (check) valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The size 300 bowl is PC (polycarbonate).
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, PT as the standard thread and G (BSPP) or NPT as order options, plus a choice of drain type, filter grade and gauge scale; size 600 bowls are aluminium alloy. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR300-10ALF2WG AirTAC Filter Regulator G3/8 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 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 — square, psi 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use supply for a pick-and-place robot cell: the 5 um element and the regulator deliver cleaned, pressure-controlled air to the gripper valves at the workstation.
Feeds pneumatic actuators on a beverage bottling line, where the automatic drain handles condensate from humid compressor air and the low-pressure type suits gentle actuation.
Serves a paint spray booth drop with filtered, regulated air at the gun supply, the psi gauge letting operators set and read the low working pressure directly.
Choose the GFR size by the port and flow your line needs: this unit is size 300 with a G3/8 port, and larger sizes step up in port and flow. Drain type is a real choice - automatic (fitted here) empties the bowl without attention, while manual and differential-pressure drains suit other service routines. Filter grade is 40 um standard or 5 um (code W), fitted here. The embedded square gauge can be ordered with MPa, psi or bar scales (psi here) and an external round gauge is optional. Thread is G (BSPP) on this model; PT is the standard and G/NPT are catalogue order options. This is the low-pressure regulator type; its exact regulation range is not published, so confirm it with us. Flow is published as curves, not a single rating - 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 GFR flow as curves rather than a single rated figure, so we do not quote a number. Send us your required flow and line pressure and we will confirm sizing from the datasheet on request.
The A in the code fits the automatic drain, which ejects collected condensate without operator attention - useful on lines with a steady humidity load. Manual and differential-pressure drains are catalogue alternatives; tell us your service preference and we will quote the matching code.
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.