The AirTAC GFR30008AC3TK AirTAC Filter Regulator 1/4 NPT 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 GFR30008AC3TK is a size-300 GFR filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/4 in NPT port, an automatic drain that discharges collected condensate without manual attention, a 40 um standard filter element, a fitted round pressure gauge with bar scale, a reverse (check) valve (code K), and a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi). Operating temperature is -5 to 70 C (non-freezing), and the polycarbonate bowl suits the size-300 frame.
This is a genuine AirTAC part from the G-series range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, plus a choice of automatic, manual or differential-pressure drains and 40 um or 5 um (code W) filtration. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR30008AC3TK AirTAC Filter Regulator 1/4 NPT 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 | 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. 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. |
| 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) |
Feeding a bench pneumatic press or clamping fixture: the 40 um element keeps swarf and water out of the cylinder valves while the regulator holds a steady set pressure for repeatable forming and clinching cycles.
Supplying air to carton-sealing and case-erector cylinders on a packaging conveyor: the automatic drain clears condensate overnight-shift after shift, and the bar gauge lets operators verify set pressure at a glance.
Point-of-use treatment at a maintenance-shop air drop running impact wrenches, ratchets and blow guns: the check valve holds downstream pressure if supply dips, and the regulator lets each station set its own working pressure.
Choose the size-300 / 1/4 in NPT step when your line's porting and expected flow sit in that band; larger sizes (400, 600) carry bigger ports and more flow, smaller ones (200) less. This unit already fixes several choices for you: automatic drain (no daily manual blow-down), 40 um standard filtration (specify W for 5 um if finer particulate protection is needed), a round gauge reading in bar, and a fitted check valve. If you would rather read pressure in MPa or psi, other gauge scales are available in the series, and PT or G threads can be ordered instead of NPT.
Because AirTAC publishes flow only as curves and not as a single rated number, ask us to confirm the flow and datasheet figures against your application before ordering - we will match the size to your real demand rather than guessing.
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 GFR300 as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and expected air demand and we will confirm the flow and datasheet figures on request, and check whether the 300 size with its 1/4 in NPT port is the right step before you order.
The A in the code GFR30008AC3TK specifies an automatic drain, which expels collected condensate from the polycarbonate bowl on its own - useful on lines that run unattended. Manual-drain and differential-pressure-drain versions exist in the same GFR300 series; note that the regulator adjustment range differs by drain type (0.15-0.9 MPa / 20-130 psi for automatic and differential-pressure, 0.05-0.9 MPa / 7-130 psi for manual), so we can help you pick the right variant.
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.