The AirTAC GFR300C08AF1WTK 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 GFR300C08AF1WTK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded NPT1/4 (1/4 in), carries a 5 um filter element (the finer of the two catalogue grades), and drains condensate automatically, so the bowl does not rely on someone opening a manual drain. A square pressure gauge (MPa scale) is fitted, a reverse/check valve is included, and a mounting bracket comes with the unit. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits this size class; keep the unit away from freezing conditions and incompatible chemicals.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the family you can choose thread type (PT standard, with G and NPT as catalogue options), drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional), gauge style and scale, and low-pressure or standard regulator types. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300C08AF1WTK 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) |
Feeding clean, pressure-stabilised air to the clamp and press cylinders on a small assembly fixture, where the 5 um element protects seals and the check valve holds the set pressure if the supply dips.
Conditioning the 1/4 in air drop feeding diverters, stoppers and pusher cylinders on a packaging conveyor, with automatic drain keeping condensate out of the valves during shifts.
Supplying regulated air to bench-top pneumatic tooling in a lab or pilot line, where the 5 um grade and a visible MPa gauge give operators a clean, monitored supply at the bench.
Start with the port step: this unit is 1/4 in NPT, one of six GFR port sizes (1/8, 1/4, 3/8, 1/2, 3/4, 1 in) across sizes 200 to 600 - step up a size if your line needs more flow, since flow is published as curves rather than one rated number. This unit already carries the finer 5 um element; the family default is 40 um if your application does not need the finer grade. Drain choice matters: differential-pressure (default), automatic (as fitted here) or manual. Gauge options are an embedded square gauge (as here, MPa scale) or an external round gauge, with MPa, psi or bar scales. Thread is PT as standard, with G (BSPP) and NPT as orderable options - this unit is the NPT version. Brackets are optional across the family and included here. Before ordering, send us your application details and we will confirm sizing against the datasheet flow curves.
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 the GFR series as curves, not as a single rated number, so there is no one figure we can honestly quote. Tell us your application and we will confirm the relevant flow and datasheet figures for this 1/4 in, size 300 unit on request before you order.
The GFR family offers a 40 um standard element and a finer 5 um option (code W); this model carries the 5 um grade for applications that need finer particulate removal. Drain codes are differential-pressure (default), automatic (A, as fitted here) and manual (M) - the automatic drain expels collected condensate without manual intervention.
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.