The AirTAC AirTAC GFR300C08ALC2WTK 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 GFR300C08ALC2WTK is an AirTAC GFR filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 300 unit is threaded NPT1/4, carries the finer 5 um filter element (the W grade, against the 40 um standard), drains its metal bowl automatically, and regulates with the low-pressure (L) type regulator. A reverse (check) valve is fitted, an external round gauge in psi is included, and the 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 family spans sizes 200, 300, 400 and 600 with ports from 1/8 in up to 1 in, and can be ordered with manual or differential-pressure draining, a 40 um or 5 um element, embedded square or external round gauges in MPa, psi or bar scales, standard PT, G (BSPP) or NPT threads, and with or without bracket, gauge or check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | AirTAC GFR300C08ALC2WTK 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) |
Filtered, regulated air for the clamping and sealing cylinders of a carton-forming or wrapping line, where the low-pressure regulator holds a gentle, steady supply downstream of the compressor.
Supplying pneumatic clamps and small press fixtures on an assembly bench, with 5 um filtration protecting close-tolerance valves and cylinders from particulate carryover.
Point-of-use air for laboratory and test-bench instruments that need clean air held at a low, stable pressure, with the automatic drain keeping condensate out of the circuit.
Step through the real choices in order. Size: 200, 300, 400 and 600 step up in port and flow capacity - this unit is size 300 with a 1/4 in NPT port, so match the step to your line's air demand. Drain: automatic (this unit) expels condensate without daily attention, manual suits attended installations, and differential-pressure is the catalogue default. Filter grade: 5 um (W) for finer particulate control, 40 um as the standard. Gauge: embedded square or external round, with MPa, psi or bar scales - this unit carries a round psi gauge. Thread: NPT here; PT is the standard and G (BSPP) is an order option. The bracket is included, and the fitted check valve holds downstream settings against backflow.
One honest note on sizing: flow is published as curves, not a single rating, so send us your required flow and working pressure and we will confirm the selection 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 honest single number to quote. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
The W code selects the 5 um element against the 40 um standard, giving finer particulate removal ahead of sensitive valves and cylinders. The A code makes the drain automatic, so condensate is expelled without daily manual draining. Manual and differential-pressure drain versions are available in the same family if your maintenance routine suits them better.
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.