The AirTAC GFR300C08AJC3WT 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 GFR300C08AJC3WT is an AirTAC GFR-series filter regulator: water-and-particulate filtration and pressure regulation combined in one body with a single bowl and one adjustment point. This 300-size unit is threaded NPT1/4 (1/4 in), carries the 5 um filter element (code W, against the 40 um standard), drains condensate automatically, and is fitted with a round pressure gauge reading in bar. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, the polycarbonate (PC) bowl suits the 300 size, and the unit is ordered without a mounting bracket.
It is a genuine AirTAC part, rated for compressed air at up to 1.0 MPa (145 psi) inlet and -5 to 70 C (non-freezing). The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options including manual or differential-pressure drains, 40 um or 5 um elements, embedded square or external round gauges with MPa, psi or bar scales, G and NPT thread variants, brackets and a reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR300C08AJC3WT 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) |
Feeding filtered, regulated air to carton sealers and case packers on a packaging line, where the 5 um element protects directional valves from particulate carryover and the regulator holds a steady supply pressure to the actuators.
Supplying pilot and actuation air to conveyor stop gates and diverter cylinders, where the automatic drain clears condensate collected across shifts and the round bar gauge lets line staff check the set pressure at a glance.
Providing clean, regulated air to analytical or test instruments in a lab panel, where the 5 um filtration and a stable downstream pressure protect sensitive pneumatic components in the instrument loop.
The real, decodable choices on this family are: size and port (200/300/400/600, ports 1/8 in to 1 in) stepped against the air demand of the circuit; drain type - automatic (as here), manual, or differential-pressure; filter element 40 um standard or 5 um (W) for finer particulate; gauge style and scale (embedded square as standard, external round optional, in MPa, psi or bar); thread, where PT is the standard and G and NPT are order options; and whether a mounting bracket is included. This unit is 300 size, NPT1/4, 5 um element, automatic drain, round bar gauge, standard regulator, no bracket.
Flow for the GFR series is published as curves, not a single rated figure, so send us your working pressure and air demand and we will confirm sizing from 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 rated flow number. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet on request.
The W code on this model selects the 5 um element against the 40 um standard. Choose 5 um where downstream valves, cylinders or instruments need finer particulate removal; the 40 um element suits general plant air. Both grades are catalogue options across the GFR family.
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.