The AirTAC GFR300C08AC2GK AirTAC Filter Regulator G1/4, 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 GFR300C08AC2GK is a size-300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/4 in (G1/4) G-thread port, a 40 um standard filtration element, an automatic drain that ejects collected condensate without manual attention, and a fitted reverse/check valve that holds downstream pressure if the supply drops. Outlet pressure is set across the standard 0.15-0.9 MPa (20-130 psi) range, and the round pressure gauge fitted here reads in psi. Maximum inlet pressure is 1.0 MPa (145 psi), and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um (W) filtration, gauge type and scale options, and G or NPT thread variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C08AC2GK AirTAC Filter Regulator G1/4, 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) |
Feeding filtered, regulated air to the directional valves and cylinders of a carton-forming or wrapping line, with the automatic drain handling condensate on a machine that runs unattended shifts.
Setting a stable clamping pressure on a small pneumatic press or workholding fixture, where the check valve holds the set pressure if the shop air supply dips mid-cycle.
Supplying regulated air to divertors, stoppers and pop-up rollers on a conveyor line, with the 40 um element protecting the solenoid valves from water and pipe scale.
Size and port step up together: 200 through 600 cover 1/8 in to 1 in ports, so pick the size whose published flow curve covers your demand at your working pressure rather than oversizing on port alone. Drain choice is real: automatic drain (this unit) suits unattended or hard-to-reach installations, manual drain suits supervised points, and the differential-pressure default drains only when the pressure drop warrants it. Filtration is 40 um standard; specify the W code for 5 um where finer protection is needed. Gauge options are the embedded square gauge or an external round gauge, with MPa, psi or bar scales - this unit carries the round psi gauge. Thread is G here; PT is the standard and NPT is an order option. A bracket is included; the J code omits it. Because flow is published as curves and 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 the GFR300 series as curves rather than a single rated figure, so we do not quote one number. Tell us your working pressure and air demand and we will confirm the flow figures from the datasheet for your application before you order.
The A in the code specifies the automatic drain, which ejects collected condensate from the bowl without manual attention - useful where the unit is mounted in a cramped or infrequently visited spot. The K specifies a reverse/check valve, which helps hold downstream pressure if the upstream supply is lost. Both are factory-fitted on this configuration.
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.