The AirTAC GFR30008ALF3WTK AirTAC Filter Regulator NPT1/4 5 um is a genuine G-series filter regulator: water separation, 5 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 series combines water and particulate filtration with pressure regulation in a single body, so one 1/4 in connection does both jobs. This configuration, GFR30008ALF3WTK, is the size 300 unit with an NPT1/4 port, a 5 um filter element (the finer W grade, against the 40 um standard), an automatic drain that ejects collected condensate without manual attention, the low-pressure regulator type, an embedded square gauge reading in bar, a reverse/check valve fitted, and a mounting bracket included. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with a choice of PT, G or NPT thread, differential-pressure, automatic or manual drains, 40 um or 5 um elements, standard or low-pressure regulation, gauge scales in MPa, psi or bar, and an optional check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008ALF3WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 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, bar 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding filtered, regulated low-pressure air to the sealing jaws and actuation cylinders of a cartoning or blister line, with the automatic drain keeping condensate out of the valves.
Holding a steady low set pressure on the clamp cylinders of a machining fixture so workpieces stay seated through the whole cycle, with the bar gauge giving the operator a direct reading.
Supplying 5 um filtered air to nozzle arrays that clear chips or dust from parts between stations, with the check valve holding the circuit when the upstream supply dips.
Size 300 with a 1/4 in port sits in the middle of the GFR range (200/300/400/600); step up or down a size when the flow curve for your demand calls for it. This unit already carries the finer 5 um element (code W) instead of the 40 um standard, an automatic drain instead of manual or differential-pressure, the low-pressure regulator type, a square gauge scaled in bar, and a fitted check valve; the alternative choices are on the same datasheet if you want a different combination. Thread here is NPT, with PT as the standard and G (BSPP) available to order, and the bracket is included.
One honest note on sizing: AirTAC publishes GFR flow as curves, not as a single rated number, so we do not quote a flow figure here. Send us your line demand and we will confirm the right size against the datasheet 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 G-series flow as curves rather than a single rated figure, so we do not state a flow number for this unit. Tell us your line demand and application and we will confirm the sizing against the datasheet on request before you order.
The W code in the model specifies the optional 5 um element, which captures finer particulate than the 40 um standard grade - a common choice ahead of sensitive valves and actuators. The A code specifies an automatic drain, which ejects collected condensate from the bowl on its own instead of waiting for someone to open a manual drain.
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.