The AirTAC GFR300C08ALJF3WT 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 AirTAC GFR series combines filtration and pressure regulation in a single body: air passes a filter element that removes water and particulate, then a regulator sets the downstream pressure. This GFR300 configuration is built around a 1/4 in NPT port and a 5 um element, the finer of the two published filter grades, with an automatic drain that handles collected condensate without manual attention. The regulator is the low-pressure type, an embedded square gauge with a bar scale is fitted, and no reverse/check valve is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The bowl on this unit is metal, and it is supplied without a mounting bracket.
This is a genuine AirTAC part. GFR300 is the mid size in the GFR range, which spans sizes 200, 300, 400 and 600 with progressively larger ports and flow capacity; drain type, filter grade, gauge scale, thread and bracket choices can all be specified at order. AirTAC publishes flow for this series as curves rather than a single rated figure, so ask us to confirm flow and other datasheet figures for your application before ordering.
| Model | GFR300C08ALJF3WT 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) |
A conditioning and pressure-setting point ahead of air-piloted diaphragm and butterfly valves on a bottling or water-treatment skid, where the low-pressure regulator type sets a moderate supply to the actuators and the automatic drain keeps condensate out of the pilot lines.
Filtered, regulated air for the swing clamps and ejector cylinders on a machining-centre fixture, with the 5 um element protecting the clamp valves from grit and the automatic drain coping with shift-long duty.
Supplying the divert and stop cylinders on a carton conveyor line, where the square bar gauge lets operators check the set pressure at a glance and the metal bowl is specified where polycarbonate is not the preferred bowl material.
Choose the size and port against the flow your line needs: GFR300 with a 1/4 in port sits in the middle of the 200/300/400/600 range, and stepping up a size gives a larger port and more flow capacity. The 5 um element fitted here is the optional fine grade (40 um is the standard); keep it where downstream valves and instruments need cleaner air. The automatic drain suits unmanned or hard-to-reach installations, with manual and differential-pressure drains as the other catalogue choices. The embedded square gauge on this unit reads in bar, with psi and MPa scales available and an external round gauge as an option. The regulator is the low-pressure type; its exact setting range is not published in our sheet, so confirm it with us if your set pressure is critical. Thread is NPT here - PT is the AirTAC standard and G (BSPP) can be ordered - and the bracket position is J, so no mounting bracket is included, though one can be specified. AirTAC publishes flow as curves, not a single rating, so send us your pressure and flow conditions 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 there is no one number we can honestly quote. Tell us your inlet pressure, set pressure and required flow, and we will confirm the curve figures from the datasheet for this exact 1/4 in NPT model before you order.
The trailing T in the code sets NPT. PT is the AirTAC standard thread and G (BSPP) is also a catalogue option, selected through the thread suffix when ordering. The port size stays 1/4 in across all three threads, so if you need a different thread, order the matching suffix rather than adapting fittings.
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.