The AirTAC GFR30008AJF2G 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 GFR30008AJF2G is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This configuration has G1/4 (BSPP) ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a standard-type regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range, and an embedded square gauge reading in psi. The polycarbonate bowl suits this 300 size, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8" to 1", and options that include manual or differential-pressure drains, a 5 um element (code W), low-pressure regulation, gauge scale in MPa or bar, an external round gauge, a reverse/check valve, and NPT or PT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR30008AJF2G 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 — square, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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) |
Conditioning the shop-air feed to a CNC machine's pneumatic valves and tool-change cylinders: the filter stage strips water and chips-laden particulate before the regulator holds a steady set pressure for clamping and actuation.
Feeding cleaned, regulated air to carton-forming and sealing heads on a packaging line, where the automatic drain keeps condensate out of the bowls without an operator stopping between shifts.
Pre-treating the air supply to a spray booth's air-driven equipment, with the 40 um element catching pipe scale and the regulator letting the operator set the delivery pressure the booth controls expect.
Size 300 with G1/4 ports is the right step when your line's flow demand sits in the mid range; step up to size 400 or 600 for larger ports and higher flow, or down to size 200 for compact circuits. The automatic drain on this unit suits unattended or hard-to-reach installations; choose manual drain where you prefer controlled, scheduled blowdown, or differential-pressure drain where you want discharge triggered by bowl pressure drop. The 40 um element is the standard grade for general plant air; specify the 5 um W option where finer pre-filtration is needed. The embedded square gauge here reads in psi; MPa and bar scales are available, and an external round gauge is optional. G thread is the order option on this code (PT is the standard thread, NPT also available), and the J suffix means no mounting bracket is fitted.
Because flow is published as curves rather than a single rated figure, 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 as curves, not as a single rated number, so we do not quote a figure here. Send us your application details and we will confirm the flow behaviour from the datasheet on request before you order.
The A in the code gives an automatic drain, which discharges collected condensate on its own - useful on lines that run unattended. The GFR300 is also available with a manual drain for scheduled blowdown, or a differential-pressure drain that discharges when bowl pressure drop rises; the drain choice also affects the regulation range quoted in the catalogue.
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.