The AirTAC GFR300C08C2WTK 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 GFR300C08C2WTK is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is built with a 1/4 in NPT port, a 5 um filter element (the fine grade; 40 um is the standard option), a differential-pressure drain, a round pressure gauge reading in psi, and a reverse/check valve fitted. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with this drain type, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 300 size, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread form (PT standard; G and NPT to order) and bracket. 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 | GFR300C08C2WTK 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, regulated air to the tool-change and clamping circuits of a machining centre, where the 5 um element protects fine pneumatic valves from particulate and the psi gauge lets maintenance set and verify line pressure at a glance.
Conditioning the air feeding conveyor diverters and carton-sealing cylinders on a packaging line, with the check valve holding the set pressure downstream if the compressor side drops out mid-cycle.
Installed at a workbench or cell drop on the factory floor to filter and regulate branch air locally, so each station sets its own pressure from the main ring main without touching the plant-wide regulator.
Size and port set the flow path: this unit is 300 size with a 1/4 in NPT port, one step up from the 200 series, so step up or down according to the air demand of the circuit. The 5 um element (code W) is the finer choice for sensitive downstream equipment; the 40 um standard element suits general protection. The differential-pressure drain bleeds accumulated condensate automatically as pressure drops across the drain, with no daily manual draining. The round psi gauge gives a familiar readout for US-style panels, and the fitted check valve holds downstream pressure if upstream supply is interrupted. Thread here is NPT; PT is the catalogue standard and G (BSPP) is also available to order. A bracket is included for panel or wall fixing. Because flow is published as curves and not a single rating, send us your air demand 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 flow for the GFR300 series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your air demand and line conditions and we will confirm the relevant datasheet figures for this 300-size, 1/4 in NPT unit on request before you order.
The code position W selects the 5 um filter grade instead of the 40 um standard element. Choose 5 um where downstream equipment is sensitive to fine particulate, such as precision valves, air bearings or instrumentation; the 40 um standard element is the economical choice for general-purpose protection. Both grades are available across the GFR300 family, and the differential-pressure drain and psi gauge on this unit work the same way with either grade.
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.