The AirTAC GFR300C08JNWT 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 GFR300C08JNWT is a 300-size filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady at your set point. This configuration has NPT1/4 ports, the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, and no gauge fitted - add one separately if you want a visual set-point reference. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), the PC (polycarbonate) bowl suits non-freezing compressed air from -5 to 70 C, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and each size can be ordered with a different drain type, a 40 um or 5 um element, a gauge, a bracket, and PT, G (BSPP) or NPT threads. Flow is published as sizing curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application before ordering.
| Model | GFR300C08JNWT 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 air cylinders on a stamping or clamping station: the 5 um element keeps wear particles and condensed water out of cylinder seals and valves, while the regulator holds a steady clamping force set point shift after shift.
Supplying the air actuators on a carton erector or case sealer, where fluctuating upstream pressure would upset timing. The filter regulator cleans the air and pins the working pressure, and the differential-pressure drain keeps condensate from accumulating during long runs.
Conditioning shop air before it reaches pneumatic gauges, air bearings or test-rig actuators: the 5 um grade gives finer filtration than the standard element, and the regulator gives a repeatable, adjustable supply pressure for consistent test conditions.
Step through the decodable choices: pick the size and port (200 through 600, 1/8 to 1 inch) against the flow your line needs; choose the drain - differential-pressure (this unit, self-bleeding under load), automatic, or manual for a bowl you drain by hand; choose the element, 40 um standard or 5 um (this unit, code W) for finer protection of downstream components; and specify the thread, PT as standard or G (BSPP) / NPT to order. Gauges and brackets are order options, so add them if you want a local pressure readout or panel fixing.
One honest note on sizing: AirTAC publishes flow as curves, not a single rated number, so we do not quote a flow figure here. Send us your application and we will confirm the right size and the datasheet figures 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 sizing curves rather than a single rated figure, so we do not quote a l/min, m3/h or SCFM number here. Tell us your application and operating pressure and we will confirm the flow from the datasheet and check the 300 size against your requirement before you order.
The W in the code GFR300C08JNWT selects the optional 5 um filter element instead of the 40 um standard. The finer grade suits downstream components that tolerate less particulate, such as precision valves, cylinders with soft seals or instrument circuits. If your application only needs general water and dirt removal, the 40 um standard element is the usual choice - both grades are available across the GFR range.
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.