The AirTAC GFR300-08ALC1TK AirTAC Filter Regulator NPT1/4 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 GFR300-08ALC1TK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/4 in NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and the low-pressure regulator type for applications that run below standard line pressures. It is fitted with an external round pressure gauge scaled in MPa, a reverse/check valve to hold downstream settings, and a mounting bracket. The polycarbonate bowl is rated with the unit for a maximum inlet pressure of 1.0 MPa (145 psi) and a media temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of ports, thread standards (PT standard; G and NPT to order), drain types, 40 um or 5 um filtration, gauge styles and scales, and low-pressure or standard regulator types. Flow figures for the series are published as curves rather than a single rating, so we confirm the datasheet and sizing for your application on request.
| Model | GFR300-08ALC1TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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 — round, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Filtered, regulated air feeding clamp and swing cylinders on a machining fixture, where the low-pressure regulator type holds a gentle, repeatable clamp force and the automatic drain keeps moisture out of the valve stack.
Supplying air to diverter and pusher cylinders on a packaging line, with the 40 um element protecting directional valves from particulate and the check valve holding the regulated setting through supply dips.
Conditioning the air feed on a laboratory or QC test bench, where the round MPa gauge gives a clear local reading, the automatic drain suits an unattended rig, and the bracket allows tidy panel-side mounting.
Start with the port step: size 300 with a 1/4 in NPT port suits lines whose piping and air demand sit in that band, while sizes 200, 400 and 600 step up or down for smaller or larger flows - match the size to the application's flow curve rather than to the pipe alone. Choose the drain to suit access: automatic (this unit) drains itself, manual suits attended installations, and differential-pressure draining is the default where a standing pressure differential is available. Filtration is 40 um standard; specify the W option for 5 um where downstream equipment needs finer protection. Gauge style and scale (round or embedded square; MPa, psi or bar) and the thread standard (PT standard, G or NPT) are decodable options, as is the bracket. Note this is the low-pressure regulator type; its exact adjustment range is not published in the standard table, so ask us to confirm it against your set pressure before ordering. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application's flow and pressure requirements and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code selects the automatic drain, which ejects collected condensate by itself and suits installations that are not checked daily. The catalogue also offers manual draining (code M) for attended sites and differential-pressure draining (blank) as the default. All three are available across the GFR sizes, and the drain choice also affects the regulator adjustment range, so confirm the variant that matches your set pressure.
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.