The AirTAC GFR300C08AF1T AirTAC Filter Regulator NPT1/4, Auto Drain 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 GFR300C08AF1T is a GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration is built for 1/4 in NPT piping, drains condensate automatically, carries the standard 40 um filter element, and has a square pressure gauge reading in MPa fitted. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, maximum inlet pressure is 1.0 MPa (145 psi), operating temperature is -5 to 70 C (non-freezing), and a mounting bracket is included. The polycarbonate bowl suits size 300 units (size 600 versions use an aluminium alloy bowl).
This is a genuine AirTAC part. The GFR family is made in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options across the family include manual or differential-pressure draining, a 5 um element (code W), gauge scales in psi or bar, G (BSPP) or NPT threads, and a no-bracket variant. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08AF1T AirTAC Filter Regulator NPT1/4, Auto Drain |
|---|---|
| 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) |
Clean, moisture-reduced air at a set pressure feeds the pneumatic clamps and tool-change actuators on a CNC machining centre, keeping the cell's holding force consistent through the shift.
On a form-fill-seal or cartoning machine, filtered and regulated air drives the sealing and pusher cylinders, protecting seals from water and particulate while holding repeatable cylinder force.
Water and particles are stripped from the air feeding spray guns in a finishing booth, with the regulator holding a steady gun pressure so the operator gets a consistent finish.
Size and port step up with demand: 200 units serve 1/8-1/4 in ports, 300 units serve 1/4-1/2 in, and the larger 400/600 frames cover 1/2-1 in lines - pick the size whose flow curve covers your air consumption. Drain choice matters: automatic draining (as on this unit) suits unattended duty, manual draining suits periodic checks, and differential-pressure draining suits steadily flowing lines. Filter grade is 40 um as standard or 5 um with code W for finer protection. Gauges come square or round with MPa, psi or bar scales, threads as PT (standard), G or NPT, and the bracket can be omitted with code J. Because AirTAC publishes flow only as curves, not a single rated figure, send us your application details 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 GFR300 as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure, port size and air consumption and we will confirm the flow figures from the datasheet on request.
This unit drains collected condensate automatically, so the bowl empties without operator attention - useful on lines that run unattended or around the clock. Manual-drain and differential-pressure-drain versions of the GFR300 are also available in the family if your maintenance routine suits them better.
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.