The AirTAC GFR300C08ALF3WT AirTAC Filter Regulator NPT1/4 5 um 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 See datasheet 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 GFR300C08ALF3WT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit is built on the 300 size with 1/4 in NPT ports, a 5 um filter element (the W grade, finer than the 40 um standard), an automatic drain, the low-pressure regulator type, an embedded square gauge reading in bar, and a mounting bracket. It carries a metal bowl, accepts a maximum inlet pressure of 1.0 MPa (145 psi) and operates from -5 to 70 C in non-freezing conditions. No reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm datasheet figures for your application on request.
| Model | GFR300C08ALF3WT AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 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 — factory standard, Factory standard 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. 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. |
|---|---|
| C0 | Port size See datasheet. 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Conditioning the air feeding air-pilot control valves and positioners on a process skid, where the circuit calls for a lower regulated setpoint than a standard regulator type provides and the 5 um element helps keep small pilot orifices clear.
Filtered, regulated air to pneumatic clamps and swing cylinders on a machining fixture, with the automatic drain keeping condensate out of the clamp lines during long production runs and the bar-scale gauge giving a local setpoint check.
Supplying rows of small pneumatic actuators on a carton or blister packaging line, where one 1/4 in filter regulator conditions the air for a whole bank of cylinders and the low-pressure type suits circuits running at reduced setpoints.
Choose the size and port against the air demand of the circuit: this unit is the 300 size with 1/4 in NPT ports, and the larger 400 and 600 sizes step up the port scale toward 1 in. Drain choice matters: the automatic type removes condensate on its own, the manual type needs routine attention, and the differential-pressure type is the catalogue default. Filtration is selectable at 40 um (standard) or 5 um (code W) - this unit carries the 5 um element. Gauges can be embedded square or external round, scaled in MPa, psi or bar; this one is a square gauge in bar. Thread is NPT here, with PT as the standard and G as order options, and the mounting bracket is included. This is the low-pressure type, so its adjustment range is not the standard published band - ask us to confirm it. Flow is published as curves, not a single rating, so send your flow and pressure requirements 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. 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 there is no one flow number we can quote for this model. Send us your line pressure, setpoint and air demand and we will confirm the flow from the datasheet before you order.
The W code selects the 5 um filter grade instead of the 40 um standard, giving finer particulate protection for sensitive downstream equipment, and the A code fits the automatic drain, which removes condensate without routine manual draining. Both are catalogue options across the GFR range - ask us if you need the 40 um or manual-drain variant 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.