The AirTAC GFR30008AC2G 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 PT1/4" ports, a automatic 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 GFR30008AC2G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit has G1/4 (BSPP) ports, a 40 um filter element, an automatic drain that discharges collected condensate without manual attention, and a round pressure gauge with a psi scale. The polycarbonate bowl lets you see the condensate level at a glance, and the standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR filter-regulator line is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 inch, manual or automatic drainage, a 5 um element option, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet for your application.
| Model | GFR30008AC2G AirTAC Filter Regulator G1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Clean, regulated air feeding the tool-change clamps and pneumatic actuators on a machining centre, with automatic drainage keeping condensate out of the valve stack.
A point-of-use filter regulator ahead of the pick-and-place and sealing cylinders on a packaging conveyor, holding a stable working pressure through each shift.
Mounted at the drop leg of a factory air ring main, conditioning the supply to individual workstations while the automatic drain handles moisture without daily attention.
Choose the size and port step against the air consumption of the downstream circuit: this unit is size 300 with G1/4 ports. Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. Drainage here is automatic, which suits unattended or hard-to-reach installations; manual and differential-pressure drain versions exist if you prefer scheduled or load-linked discharge. The 40 um element is the standard grade for general-purpose air preparation; a 5 um element (code W) is available where finer filtration is needed. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. The G thread on this model is BSPP; PT is the standard thread and NPT is also an order option. A mounting bracket is included with this unit.
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 performance curves rather than a single rated figure, so we do not quote one number. Send us your line pressure and air consumption and we will confirm the flow from the datasheet on request before you order.
The A in the code GFR30008AC2G means the bowl drains itself whenever collected condensate reaches the discharge threshold, which suits unattended installations. Manual (code M) and differential-pressure (blank) drain versions are available in the same series if you prefer scheduled or load-linked drainage.
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.