The AirTAC GFR300C08AC2K AirTAC Filter Regulator PT1/4 40 um 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 GFR300C08AC2K is a size-300 filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration is threaded PT1/4 (1/4 in), carries the standard 40 um filter element, and drains condensate automatically, so the bowl empties itself as liquid collects without anyone opening it by hand. The round psi gauge shows outlet pressure at a glance, and the fitted reverse/check valve holds the set pressure if the upstream supply is interrupted.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of automatic, manual or differential-pressure drain, a 5 um element option (code W), square or round gauges in MPa, psi or bar scales, and G or NPT thread options. Max inlet pressure is 1.0 MPa (145 psi), the standard regulation range for this automatic-drain version is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR300C08AC2K AirTAC Filter Regulator PT1/4 40 um 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) |
Feeds clean, regulated air to clamp cylinders on a CNC fixture line, with the automatic drain keeping condensate out of the valves between shifts.
Sits at the air inlet of a carton-sealing or wrapping machine, filtering the shop supply and holding a steady pressure to the sealing cylinders.
Provides filtered, regulated air to a pneumatic ball or butterfly valve actuator, with the check valve holding the set pressure if the header drops.
Start with the port step: this unit is 1/4 in PT on the size-300 body; step up to size 400 or 600 if the line needs a larger port. Choose the drain by how the machine is attended: automatic drain (this unit) suits unmanned cells, manual drain suits stations checked daily, and differential-pressure drain is the catalogue default. The 40 um element is standard; specify the 5 um W option where finer filtration is required. Gauge scale is selectable (MPa, psi or bar) and the round external gauge on this code reads psi. PT is the standard thread; G (BSPP) and NPT are order options. A mounting bracket is included.
Because flow is published as curves and not as a single rated figure, ask us to confirm sizing against your air consumption 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 the GFR series as curves, not as a single rated number, so there is no one figure we can quote. Send us your line pressure and air consumption and we will confirm the sizing from the datasheet curves on request.
The A in the code selects the automatic drain: condensate is discharged from the bowl by itself, which suits unattended equipment. The K selects a reverse/check valve, which holds the regulated downstream pressure if the upstream supply is lost. Both are catalogue options on the GFR family, along with manual or differential-pressure drains.
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.