The AirTAC GFR30008AC3T AirTAC Filter Regulator NPT1/4 Auto Drain 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 combines water and particulate filtration with pressure regulation in a single body. This unit is threaded NPT1/4, discharges condensate automatically, carries the standard 40 um filter element, and is fitted with a round gauge scaled in bar. The regulator adjusts outlet pressure across 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR300 size is one of four (200, 300, 400, 600) spanning ports from 1/8 to 1 inch, with manual or differential-pressure drain options, a 5 um element option, embedded square or external round gauges in MPa, psi or bar scales, and a no-bracket variant. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008AC3T AirTAC Filter Regulator NPT1/4 Auto Drain |
|---|---|
| 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 | 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 | 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| (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. |
| (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) |
Conditions and regulates the compressed air feeding workholding clamps and tool-changer cylinders on a CNC machining cell, with the automatic drain clearing condensate kicked off by the compressor loop.
Supplies filtered, regulated air to stopper and diverter cylinders along a bottling conveyor, holding a steady set pressure while the auto drain keeps moisture out of the valve bank.
Feeds the carton-forming and flap-tuck cylinders of a packaging line's case erector, combining water and particle removal with a stable regulated supply at the machine drop.
Step up or down the size series (200, 300, 400, 600) to match the port and the flow your line needs - the 300 size here gives a 1/4 inch NPT port. Drain choice matters: this unit drains automatically, while manual and differential-pressure versions are available; note the regulation range is 0.15-0.9 MPa (20-130 psi) with automatic or differential-pressure drain and 0.05-0.9 MPa (7-130 psi) with manual drain. Filter grade is the standard 40 um element, with a 5 um (code W) option where finer filtration is needed. Gauge: this configuration carries a round gauge scaled in bar; embedded square gauges and MPa or psi scales are alternatives. Thread: NPT here, with PT as the standard and G (BSPP) orderable. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 this series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote honestly. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
The automatic drain discharges collected condensate from the bowl without anyone opening it by hand, which suits unattended or hard-to-reach installations. Manual and differential-pressure drain versions of the GFR300 are also available; note that with an automatic drain the regulation range is 0.15-0.9 MPa (20-130 psi), while manual-drain versions widen it to 0.05-0.9 MPa (7-130 psi).
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.