The AirTAC GFR30008AC3WTK AirTAC Filter Regulator NPT1/4 5um 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 GFR30008AC3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, with a 1/4 in NPT port. This configuration carries a 5 um filter element (the finer W grade, against the 40 um standard), an automatic drain that clears collected condensate without operator attention, and a reverse/check valve on the regulated side. The round pressure gauge is fitted and reads in bar, and the unit includes a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600, with port options from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge style and scale, and optional low-pressure or check-valve variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR30008AC3WTK AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| 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 | 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. |
| 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) |
Placed at the drop feeding a small pneumatic press or clamping fixture, this unit cleans the shop air to 5 um, holds a steady regulated pressure to the cylinder, and its check valve helps hold the set pressure if upstream supply dips. The automatic drain keeps water out of the bowl without a daily walk-round.
On a wrapping or cartoning machine fed from a shared plant-air ring, this 1/4 in filter regulator conditions the branch supplying directional valves and small actuators. The bar-reading round gauge gives operators a clear setpoint, and the automatic drain suits equipment that runs unattended across shifts.
On a test bench or lab rig where instruments and pneumatic controls need clean, stable air, the 5 um element removes fine particulate and water carryover while the regulator sets the exact test pressure. The check valve prevents backfeed from the bench side, and the bracket allows tidy panel or frame mounting.
Start with the port step: the 300 size on this model takes a 1/4 in NPT connection, and sizes 200 through 600 step up in both port and flow capacity, so match the size to the air demand of the circuit. Choose the drain to suit access: automatic (as here) suits unattended or hard-to-reach installations, manual suits supervised points, and the differential-pressure default drains on load. Pick 5 um filtration (this model) where downstream valves, cylinders or instruments need finer protection than the 40 um standard. The gauge here is the external round type reading in bar; embedded square gauges and MPa, psi or bar scales are the other decodable choices. Thread is NPT on this code, with PT standard and G available to order; a mounting bracket is included.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the datasheet and correct size 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 family as performance curves rather than a single rated figure, so we do not quote a flow number for this model. Tell us your application and air demand and we will confirm the datasheet and check the 300 size, 1/4 in port against your requirement before you order.
Both are read directly from the code: A is the automatic drain, which expels collected condensate on its own instead of waiting for a manual twist of the bowl, and W is the 5 um filter grade, one step finer than the 40 um standard. The unit also carries the K reverse/check valve, a round bar gauge, and a mounting bracket, with a 1/4 in NPT port.
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.