The AirTAC GFR300C08ALC2WK AirTAC Filter Regulator 1/4 in 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 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 GFR300C08ALC2WK is a size 300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, for compressed air only. This configuration is decoded as a 1/4 in PT port, a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate from the metal bowl without manual attention, a low-pressure regulator type, a round pressure gauge with a psi scale, a built-in reverse/check valve, and a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread form and bracket. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08ALC2WK AirTAC Filter Regulator 1/4 in Low-Pressure |
|---|---|
| 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) |
On a CNC fixture line where clamps hold workpieces at modest set pressures, this filter regulator cleans the supply to 5 um, holds the regulated setting on the round psi gauge, and its automatic drain keeps condensate out of the clamp cylinders.
Filling, sealing and cartoning machines run many small air cylinders from a shared 1/4 in drop; a single low-pressure filter regulator at the machine inlet gives filtered, regulated air to all of them, with the check valve holding the circuit if supply dips.
Pilot-supplied and spring-return pneumatic valves on a water-treatment or chemical dosing skid need clean air at a stable, often low set pressure; this unit filters to 5 um, regulates for the actuator rating, and auto-drains the bowl in an unmanned plant room.
Choose the size and port step (200 through 600, 1/8 in to 1 in) against the air demand of the circuit; this unit sits at size 300 with a 1/4 in PT port. Where a bowl is fitted you can select differential-pressure drain (the default), automatic drain (as here) or manual drain; automatic suits points that are hard to reach or run unattended. Filter grade is 40 um standard or 5 um (code W) where finer particulate removal is needed - this unit carries the 5 um element. Gauges are offered as the embedded square type or an external round gauge, with MPa, psi or bar scales; this configuration has the round gauge in psi. Thread is PT as standard, with G (BSPP) and NPT available as order options, and the bracket is included. Because AirTAC publishes flow only as curves and not as a single rated number, send us your application details and we will confirm sizing 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 performance curves, not as a single rated number, so there is no one l/min, m3/h or SCFM figure we can honestly quote. Tell us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet on request before you order.
The L in the code marks the low-pressure regulator type, intended for circuits that run below the range of the standard version. The exact adjustment window for the low-pressure type is not published in the material we hold, so we confirm it from the datasheet on request. Everything else in this code decodes normally: 1/4 in PT port, 5 um element, automatic drain, round psi gauge and check valve.
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.