The AirTAC GFR30008AJC2WTK 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 GFR30008AJC2WTK is a GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This 300-size unit is drilled for 1/4 in NPT ports and carries the W-grade 5 um element for finer protection of downstream valves and cylinders than the standard 40 um element. Condensate is handled by the automatic drain, so collected water is expelled without manual attention, and the fitted reverse/check valve holds downstream pressure if the upstream supply drops. An external round gauge scaled in psi is fitted, the polycarbonate bowl suits this size, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008AJC2WTK 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 | 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, psi 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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 a bench pneumatic press or clamping fixture from a shop-air drop: the 5 um element keeps fine debris out of the control valve, the regulator sets the working pressure, and the check valve holds the circuit if the main supply dips mid-cycle.
Conditioning air to the cylinders and diverters on a packaging or bottling conveyor: regulated pressure keeps motion consistent, the automatic drain clears condensate without operator rounds, and the psi gauge gives the line technician a visible setpoint.
Supplying tool-changer, clamp and purge air on a CNC machine tool: the 5 um grade protects solenoid valves from water and fine particles, and the round psi gauge lets maintenance verify the regulated setting at a glance.
Size and port step up together: 200 through 600 cover 1/8 in to 1 in, so match the size to the pipe and the air demand of the circuit. For this unit the drain choice matters: automatic drains condensate on its own, manual needs periodic bleeding, and the differential-pressure default suits lines that run continuously. Filtration is 40 um standard or 5 um with the W code - the finer element suits precision valves and instruments. Gauges can be the embedded square type or an external round gauge, scaled in MPa, psi or bar. Thread is PT as standard with G and NPT as order options, and a bracket can be added or omitted with the J code. Flow is published as curves, not a single rating, so send us your air demand and we will confirm sizing 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a number. Tell us your line pressure, set pressure and air demand, and we will confirm the flow from the datasheet for this 300-size, 1/4 in unit before you order.
The W code in the model selects the optional 5 um filter grade instead of the 40 um standard. The finer element suits downstream precision valves, instruments and air bearings; the standard 40 um grade remains available on other GFR300 variants if coarser general-purpose filtration is all the circuit needs.
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.