The AirTAC GFR300C08F3WTK 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 GFR300C08F3WTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a 1/4 in NPT port, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain, an embedded square gauge reading in bar, and a reverse/check valve fitted. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions. At size 300 the bowl is polycarbonate (PC); only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR filter-regulator family is published in sizes 200, 300, 400 and 600, with port options from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, 40 um standard or 5 um (W) filtration, differential-pressure, automatic or manual drains, and gauge or no-gauge variants. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08F3WTK 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) |
Feeds a bench-mounted pneumatic press or clamping fixture: the 5 um element keeps water and swarf out of the cylinder valves, the bar gauge gives the operator a local setpoint readout, and the check valve holds the circuit against backflow.
Point-of-use conditioning for a cartoning or wrapping line: the filter-regulator cleans and steadies the supply to the machine's air cylinders and ejectors, with the differential-pressure drain carrying condensate away during production runs.
Supplies the air-actuated divertors and stoppers on a conveyor line: the regulator holds a stable setpoint for consistent actuation, the 5 um grade protects the solenoid valves, and the 1/4 in NPT port suits compact manifold drops.
Size and port set the capacity: this unit is size 300 with a 1/4 in NPT port; step up to 400 or 600 when the required flow outgrows the port, or down to 200 for compact drops. Drain choice matters: differential-pressure (this unit) drains automatically as flow passes, automatic (code A) drains on a cycle, and manual (code M) needs operator attention. Filter grade is 40 um standard or 5 um with the W code - this unit carries the 5 um element for cleaner air. Gauge options are the embedded square gauge (this unit, bar scale) or an optional 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 NPT. A bracket is included.
Flow for the GFR series is published as curves, not a single rated figure, so we do not quote a number here. Send us your application 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 GFR series as curves rather than a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow and sizing against the datasheet on request before you order.
The W code in the model number selects the 5 um element instead of the 40 um standard grade, giving finer removal of particulate for downstream valves and actuators. The drain on this unit is differential-pressure, so condensate is discharged automatically as air flows through.
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.