The AirTAC GFR300C08C1WT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08C1WT is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This configuration is built around a 1/4 in NPT port with a 5 um filter element (code W, tighter than the 40 um standard), a differential-pressure drain on the polycarbonate bowl, and a standard regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range. A round pressure gauge scaled in MPa is fitted and 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 family spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT threads, 40 um or 5 um filtration, differential-pressure, automatic or manual drains, and gauge or no-gauge builds. AirTAC publishes flow as curves rather than a single rated figure, so we confirm flow and datasheet figures on request before you order.
| Model | GFR300C08C1WT AirTAC Filter Regulator 1/4 in NPT 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 filtered, regulated 1/4 in air to tool clamps, air-blast nozzles and pallet-lock cylinders on a CNC machining centre, with the 5 um element protecting fine orifices in the valve stack.
Conditioning supply air for stopper cylinders, diverters and gate actuators along a packaging conveyor, holding a steady regulated pressure as line demand cycles between stations.
Mounted ahead of a solenoid valve manifold on an assembly station, removing water and particles and holding set pressure so spool valves shift consistently, cycle after cycle.
Size and port set the air capacity: this unit is size 300 with a 1/4 in NPT port; step up to 400 or 600, or down to 200, as your demand and piping require. Filtration is 5 um here (code W) against the 40 um standard - choose 5 um where sensitive valves or instruments sit downstream. This build uses the differential-pressure drain; automatic (A) and manual (M) drains are catalogue options. The round MPa gauge is fitted, while square-gauge builds and psi or bar scales exist, and G or NPT threads are ordered explicitly against the PT standard. A mounting bracket is included. AirTAC publishes flow as curves, not a single rating, so 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. 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 rather than a single rated number, so we do not quote a figure here. Tell us your required flow and working pressure and we will confirm suitability from the datasheet on request.
This code carries the differential-pressure drain, the GFR default, which works from the pressure differential across it rather than needing to be opened by hand each time. If you prefer positive control, the same family is available with an automatic drain (code A) or a manual drain (code M).
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.