The AirTAC GFR300C08AJC3TK 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 GFR300C08AJC3TK is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body, with a drain bowl and no lubricator. This size 300 unit is threaded NPT1/4 (1/4 in) and is configured with an automatic drain, the standard 40 um filter element, a round pressure gauge reading in bar, and a reverse (check) valve fitted; no mounting bracket is included. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, and the unit is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing). The bowl on this size 300 frame is polycarbonate; aluminium bowls are used only at size 600.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, ordered with a choice of drain type (differential-pressure, automatic or manual), 40 um or 5 um (code W) filtration, gauge style and scale, PT, G or NPT thread, bracket and check-valve options. Flow for this family is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08AJC3TK 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 single point where water, scale and supply pressure are set before the directional valves on a welding or assembly fixture, feeding clean, regulated air to clamp and hold cylinders. The fitted reverse (check) valve is part of this configuration.
Supplying regulated air to pick-and-place cylinders and product diverters along a packaging conveyor, with the automatic drain discharging collected condensate through continuous shifts without manual attention.
Setting a stable gun supply pressure on a paint line, with the 40 um element catching particulates ahead of the regulator and the round bar-scale gauge giving the operator a readable setpoint at the booth.
The choices that change the part number: size and port (200/300/400/600, 1/8 in to 1 in) set against the air demand of the circuit; drain type - differential-pressure (catalogue default), automatic as fitted here, or manual; filter element 40 um standard or 5 um (code W) where finer particulate capture is needed; gauge style and scale (embedded square, or external round as on this unit, in MPa, psi or bar); thread, with PT as the standard and G and NPT as order options; bracket or no bracket (code J); and the optional K reverse/check valve, which this code carries. Because AirTAC publishes GFR flow only as curves, not a single rated figure, send us your pressure and air-demand requirements 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 GFR flow as curves rather than a single rated number, so we do not quote a figure here. Send us your working pressure and air demand and we will confirm the flow curve and the datasheet for this exact configuration on request.
This code carries A - the automatic drain, which discharges collected condensate without anyone opening the drain each shift. Manual drain needs periodic attention, and differential-pressure is the catalogue default; all three are order options across the GFR family. The choice also sets the regulator adjustment range: 0.15-0.9 MPa (20-130 psi) for automatic and differential-pressure drains, 0.05-0.9 MPa (7-130 psi) for manual.
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.