The AirTAC GFR30008ALF2 AirTAC Filter Regulator PT1/4 Low-Pressure 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 GFR30008ALF2 is a 300-size filter regulator that cleans compressed air and holds a set downstream pressure in one body. This configuration has PT1/4 ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and the embedded square gauge supplied with a psi scale. It is the low-pressure type, intended where regulated pressure sits below the standard range, and it ships with a mounting bracket. The polycarbonate bowl suits the 300 size and the unit is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, gauge scale options, and G or NPT threads as order variants. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR30008ALF2 AirTAC Filter Regulator PT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| (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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a carton-forming or sealing machine, filtered air protects the directional valves and cylinders while the regulator holds a steady supply pressure to the actuation circuit. The automatic drain keeps condensate off the valves during continuous shifts without an operator visiting the unit.
At the air drop feeding a pneumatic gripper cell, this unit removes water and particles ahead of the valve manifold and regulates the supply to the gripper cylinders. The low-pressure type suits circuits run at reduced regulated pressure, and the psi gauge gives the technician a direct setpoint readout.
On the branch line serving spray guns or air-assisted applicators, the 40 um element screens pipe scale and water carryover, and the regulator sets the working pressure for the station. The automatic drain handles condensate at a drop that may not be blown down every shift.
Start with the port step: this unit is the 300 size at PT1/4, one step up from the 200 size, and the 400 and 600 sizes carry larger ports and more flow. Choose the drain to match maintenance practice: automatic (as here) drains itself, manual drains on demand, and the default differential-pressure drain uses the pressure drop across the element. Filtration is 40 um standard; specify the W code for 5 um where finer particle removal matters. The embedded square gauge is standard and can be ordered with MPa, psi or bar scales (this unit: psi); an external round gauge is optional. Thread is PT as standard, with G (BSPP) and NPT as order options, and the bracket is included on this code.
Because AirTAC publishes flow as curves and not as a single rated number, we do not quote a flow figure here. Send us your application's flow and pressure requirements and we will confirm the correct size against the datasheet before you order.
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 rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Send us your required flow and upstream pressure and we will confirm the sizing from the datasheet on request before you order.
The A in the code GFR30008ALF2 selects the automatic drain, which ejects collected condensate from the bowl without manual attention. The GFR family is also available with a manual drain (code M) or the default differential-pressure drain, so you can match the drain to how often the installation is serviced.
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.