The AirTAC GFR300-08 G1/4 AirTAC Filter Regulator, 5 um, Low-Pressure 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 PT1/4" 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 GFR300-08MLF2WGK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit has a G1/4 (BSPP) port, the fine 5 um filter element (code W), a manual drain for emptying the bowl, and the low-pressure regulator type for applications that work below standard regulating ranges. It comes with the embedded square gauge scaled in psi, a built-in reverse/check valve, and a mounting bracket included.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of manual, automatic or differential-pressure drains, 40 um standard or 5 um fine filtration, gauge scale options, and G or NPT threads as order alternatives to PT. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-08 G1/4 AirTAC Filter Regulator, 5 um, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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. 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. |
|---|---|
| 08 | Port size PT1/4". 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)). |
| 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. |
| 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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Supplies filtered, low-pressure regulated air to clamp cylinders on CNC fixture lines, where the 5 um element protects the clamp valves and the check valve holds the circuit against backflow.
Feeds air cylinders that divert, push and stop packs on conveyor lines, combining water and particle removal with low-pressure regulation at a 1/4 inch take-off point.
Conditions the air feeding bench-top pneumatic rigs and pilot equipment, where fine 5 um filtration and a low regulated pressure with a psi gauge are specified for the process.
Choose the size and port step (200 through 600, 1/8 to 1 inch) against the air demand of your circuit; size 300 with a G1/4 port suits general machine supply lines. This configuration carries the fine 5 um element (W) - select it when downstream valves, cylinders or instruments need cleaner air than the 40 um standard grade provides. The manual drain (M) means an operator opens the bowl drain during checks; pick automatic or differential-pressure drain codes if you want unattended water removal. The low-pressure regulator type (L) is intended for circuits regulated below standard ranges - confirm the exact regulating range with us before ordering. The square gauge here is scaled in psi; MPa and bar scales are available, and an external round gauge is an option. G thread is fitted on this unit; PT is the standard thread and NPT is also an order option. A bracket is included.
Flow for this family is published as curves, not a single rated figure, so send us your application details 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 family as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
The M code fits a manual drain: condensate collected in the bowl is released by hand during routine checks, instead of automatically. The L code makes this the low-pressure regulator type, intended for circuits regulated below standard ranges; the exact regulating range for the low-pressure type is not published in the catalogue, so confirm it with us before ordering.
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.