The AirTAC GFR300C08AJF3WTK AirTAC Filter Regulator NPT1/4 5um 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 GFR300C08AJF3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate down to 5 um, drains the collected condensate automatically, and regulates downstream pressure with a standard regulator covering 0.15-0.9 MPa (20-130 psi). The 1/4 in NPT port suits compact supply drops, the embedded square gauge reads in bar, and a built-in reverse/check valve holds the set pressure against backflow. No mounting bracket is included in this configuration.
This is a genuine AirTAC part. The GFR300 size range is also available in other port sizes, thread options (PT standard, G and NPT to order), drain types, filter grades and gauge scales, with or without brackets and check valves. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300C08AJF3WTK AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| 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) |
Cleaning and regulating the air feeding cylinder-driven diverters and pushers on a packaging conveyor line, with the automatic drain carrying off condensate before it reaches the valves.
Conditioning shop-air at the drop to a CNC machining centre, where the 5 um element protects solenoid valves and the regulator holds a steady set pressure for clamping circuits.
Filtering and regulating the air supply to spray guns on a finishing line, where fine particulate removal and a stable, gauge-monitored pressure are part of consistent finish quality.
Choose the GFR300 size step by matching the port (here NPT1/4) and the flow curve to your air demand; larger sizes carry larger ports and more flow. This unit is already configured with a 5 um element (the standard is 40 um, so pick the W code only where finer filtration is needed), an automatic drain (manual and differential-pressure drains are the alternatives), a square gauge in bar, and a reverse/check valve. Thread is NPT here; PT is the standard and G is also an order option. No bracket is fitted, so plan your mounting accordingly. Because flow is published as curves rather than 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 this series as curves, not as a single rated number, so we do not quote a figure. Send us your air demand and line conditions and we will confirm the flow and sizing from the datasheet before you order.
The A in the code means the bowl drains collected condensate automatically, which suits unattended or hard-to-reach installations. The alternatives are a manual drain (drained by hand) and a differential-pressure drain (the catalogue default); the regulation range differs by drain type, with the automatic version covering 0.15-0.9 MPa (20-130 psi).
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.