The AirTAC GFR300C08F3WT AirTAC Filter Regulator NPT1/4 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 GFR300C08F3WT is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 300 unit carries a 1/4 in NPT port, a 5 um filter element (the finer W grade, instead of the 40 um standard), a differential-pressure drain, and an embedded square gauge reading in bar. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The bowl on this 300 size is polycarbonate; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including drain type, filter grade, gauge style and scale, thread form (PT standard, G and NPT to order) and mounting bracket. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08F3WT AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
On a bottling line, filtered and regulated air feeds the pneumatic cylinders that clamp, lift and eject bottles. The 5 um element keeps moisture and fines out of the valve stack, while the bar gauge lets the line technician set and verify the pressure the actuators were designed for.
A CNC machining cell uses air-actuated clamps and tool-change cylinders that need a stable, repeatable pressure. This filter regulator cleans the shop air at the drop and holds the set pressure with the square bar gauge in view, and the differential-pressure drain carries condensed water away during cutting cycles.
In a spray booth, air feeding the paint gun must be dry, clean and held at a consistent pressure for an even finish. Mounted at the booth drop with its 1/4 in NPT port, this unit strips water and 5 um particles and lets the operator dial in the atomising pressure on the bar gauge.
Start with the port step: sizes 200, 300, 400 and 600 step up in both port size and flow capacity, so match the size to the air demand of the circuit - this 300 unit with its 1/4 in NPT port suits compact drop lines and individual machines. Choose the drain next: differential-pressure (as fitted here) drains automatically as flow passes, automatic (code A) drains on a timer-free cycle, and manual (code M) needs an operator. Pick the filter grade: 40 um is the standard element, 5 um (this unit, code W) protects finer components downstream. Gauge style and scale (square embedded or external round; MPa, psi or bar) and thread form (PT standard, G or NPT) are also decodable choices, and a mounting bracket is included.
Because flow is published as curves and not a single rating, 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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow curve and datasheet figures for this 300 size, 1/4 in port unit on request before you order.
The W code in GFR300C08F3WT selects the optional 5 um filter grade in place of the 40 um standard. Choose 5 um when downstream components - precision valves, cylinders or spray equipment - need finer protection; choose 40 um for general workshop air where coarser removal is enough.
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.