The AirTAC GFR300C08AJNWTK AirTAC Filter Regulator NPT1/4, 5 um 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 See datasheet ports, a differential-pressure 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 GFR300C08AJNWTK is a size-300 filter regulator: it removes water and particulate from compressed air and holds downstream pressure in one body. This configuration carries a 1/4 in NPT port, a 5 um filter element (code W) for finer filtration than the standard 40 um, an automatic drain that bleeds collected condensate without manual attention, and a built-in reverse/check valve that holds downstream pressure if the supply drops. No gauge is fitted and no mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator set range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The bowl on this size is polycarbonate.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G or NPT threads. Drain types, filter grades, gauge options and bracket choices can be mixed to suit the installation. 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 | GFR300C08AJNWTK AirTAC Filter Regulator NPT1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. |
|---|---|
| C0 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Feeding tool-clamp and chip-clearing actuators on a machining centre, where the 5 um element protects spool valves from fine particles and the regulator holds a steady clamp pressure.
Conditioning air for divert gates, pushers and sealing jaws on a packaging conveyor, with the automatic drain handling condensate on a line that runs unattended through shifts.
Supplying pick-and-place grippers and small cylinders at an assembly cell, where the check valve holds the circuit's pressure during a supply dip and the regulator keeps grip force repeatable.
Size 300 with a 1/4 in NPT port suits lines where moderate air demand meets finer filtration and stable regulated pressure. Choose the 5 um element (this unit) over the 40 um standard when downstream valves, cylinders or instruments are sensitive to finer particles. The automatic drain on this unit is the right choice where the bowl is hard to reach or the duty cycle makes manual draining easy to forget; manual and differential-pressure drains remain available elsewhere in the range. If you need a pressure gauge, order a variant with one fitted - this code carries none. The fitted reverse/check valve is worth having on drop-sensitive circuits. PT is the standard thread; G and NPT are catalogue options ordered by code, and this unit is ordered with NPT. No bracket is included with this code, so plan a panel or manifold fixing if needed.
Because catalogue flow is published as curves and not as a single rated number, send us your application details and we will confirm the datasheet figures and correct sizing before you order.
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 number. Tell us your operating pressure and air demand and we will confirm the datasheet curve and check the sizing for your application on request.
The A in the code selects the automatic drain, which ejects collected condensate by itself instead of needing a manual twist - useful where the bowl is mounted out of reach. The N selects no gauge, so no pressure gauge is supplied; if you want to read the regulated pressure, choose a GFR300 variant with a gauge code instead.
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.