The AirTAC GFR300-08F2WGK AirTAC Filter Regulator G1/4, 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 PT1/4" 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 GFR300-08F2WGK is a filter regulator: water and particulate removal plus downstream pressure regulation combined in a single 300-size body with a 1/4 in G female port. This configuration carries the 5 um filter element (code W) for finer air cleaning than the standard 40 um grade, a differential-pressure drain that bleeds condensate automatically whenever the pressure drop across the element rises, and a polycarbonate bowl suited to the 300 size. The built-in standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), the embedded square gauge reads in psi, and the fitted reverse/check valve holds the downstream setting if upstream pressure is lost. A mounting bracket is included. 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 series is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and with choices of drain type, filter grade, gauge scale and thread form (PT standard; G and NPT are order options). Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR300-08F2WGK AirTAC Filter Regulator G1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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, 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. 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| (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) |
Feeds the clamping and tool-change circuits of a CNC machining centre: the 5 um element keeps fine contaminants out of the clamp cylinders while the regulator holds a steady clamping pressure and the check valve holds the setting through an upstream dip.
Prepares air for the diverters, pushers and sealing heads on a packaging conveyor line, where the 1/4 in G port matches typical machine drops and the differential-pressure drain keeps condensate out of the valves without daily manual draining.
Conditions the supply to lab analysers and sample-handling actuators, where the 5 um grade and a stable, gauge-monitored regulated pressure protect sensitive pneumatic components in a compact single-body unit.
Start with the port and size step: the 300 size here takes a 1/4 in G port; step up to 400 or 600 if your line needs larger ports, keeping in mind that flow capacity rises with size and is best confirmed against the published curves. Choose the filter grade for the job: the 5 um element in this unit suits finer air-cleaning duties, while the standard 40 um grade is the economical default for general plant air. Drain type matters too: differential-pressure (as fitted here) drains on load, automatic drains hands-free, and manual drain suits infrequently attended points. Gauge scale (MPa, psi or bar), thread form (PT standard, G or NPT to order), the reverse/check valve and the included bracket are all real, decodable choices. Because flow is published as curves rather than one rated figure, 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote one number here. Tell us your application and we will confirm the relevant flow data from the datasheet on request before you order.
The W in the code GFR300-08F2WGK selects the optional 5 um filter grade, which removes finer particles and mist than the 40 um standard element. It is the right choice where downstream valves, cylinders or instruments need cleaner air; the 40 um grade remains the standard option in the series.
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.