The AirTAC GFR30008ALC3WT 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 GFR30008ALC3WT is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/4 in NPT port, a 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type (code L) for circuits running below standard line pressure. A round gauge with a bar scale is fitted, a mounting bracket is included, and the polycarbonate bowl is rated for a maximum inlet pressure of 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in and thread options in PT, G (BSPP) and NPT. Drain, filter grade, gauge and regulator-type choices vary by code. Flow is published as curves rather than a single rating, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR30008ALC3WT 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 — round, bar 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). |
| C | Gauge shape: Round. 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. |
| (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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Air-prep point for clamps and swing cylinders on a machining centre, where the low-pressure regulator type holds a reduced setting for delicate workholding and the 5 um element protects directional valves from particulate.
Bench-mounted supply for test rigs and lab fixtures that run at reduced pressure, with the round bar gauge giving a direct local reading and the automatic drain keeping condensate off sensitive instruments.
Filtered, regulated air for diverters, pushers and gripper cylinders on a packaging conveyor, where the automatic drain handles condensate during continuous shifts and the bracket secures the unit to the line frame.
Start with the port step: the 300 size in this code gives a 1/4 in port, so match it to your line size and required air delivery; larger sizes (400, 600) carry larger ports for higher demand. Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering. This unit is the low-pressure type (L), so if your circuit runs at standard line pressures, ask us about the standard-type GFR variant. The 5 um element (W) suits finer particulate control; the 40 um standard element is available in other codes. The automatic drain suits unattended duty, while manual and differential-pressure drains are offered in sibling codes. This code carries a round gauge with a bar scale; square embedded gauges and MPa or psi scales exist across the series. Thread is NPT here; PT is the standard thread and G (BSPP) is an order option. A mounting bracket is included.
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, not as a single rated figure, so we do not quote a l/min or SCFM number. Tell us your line pressure and air demand and we will confirm the flow curve and sizing from the datasheet on request before you order.
In the GFR code, L marks the low-pressure regulator type, intended for circuits running below standard line pressure; the exact regulation window for this type is not published in our sheet, so we confirm it on request. C3 specifies the fitted round gauge with a bar scale, and W specifies the 5 um filter element instead of the 40 um standard.
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.