The AirTAC GFR300C08AC1T AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08AC1T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure in one compact body. This unit is threaded 1/4 in NPT, carries the standard 40 um filter element in a polycarbonate (PC) bowl, and drains condensate automatically, so it keeps working without anyone opening the drain. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) setting range, a maximum inlet pressure of 1.0 MPa (145 psi), and an operating temperature of -5 to 70 C (non-freezing). An external round pressure gauge scaled in MPa is fitted, a mounting bracket is included, and no reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options across the series include manual or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges scaled in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR300C08AC1T AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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, regulated air for tool changers, clamps and pneumatic actuators on a machining centre's 1/4 in drop line, with the 40 um element keeping debris out of the valves.
Steady regulated pressure for pick-and-place and sealing cylinders on a packaging conveyor, with the automatic drain handling condensate through continuous shifts.
Filtered and regulated air to spray guns in a finishing booth, where the 40 um element protects the gun and the automatic drain keeps moisture out of the finish.
Choose the size by port and demand: size 300 with a 1/4 in port suits compact machine supply lines, while the 200-600 range steps up to 1 in for heavier use - match the published flow curve to your air consumption rather than guessing. Pick the drain to match duty: automatic drain (this unit) suits unattended or hard-to-reach installations, manual drain suits supervised points, and the differential-pressure default drains on a pressure drop. The 40 um element is standard; specify code W for 5 um where finer particulate protection matters. Gauge style and scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and the bracket (omit with code J) are all decodable choices. Because flow is published as curves, not 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 rather than a single rated figure, so we do not quote a number here. Send us your operating pressure and air consumption and we will confirm sizing from the datasheet on request.
The automatic drain expels collected condensate on its own, which suits installations that run unattended or where the bowl is awkward to reach. Manual-drain and differential-pressure versions are available in the same GFR300 series if you prefer to drain on a schedule or on a pressure drop.
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.