The AirTAC GFR300C08MLJF3WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08MLJF3WTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is decoded as a 1/4 in NPT port, a fine 5 um filter element (code W), a manual drain on the metal bowl, the low-pressure regulator type, an embedded square gauge with bar scale, a reverse/check valve fitted, and no mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR300 sits in the GFR size range of 200, 300, 400 and 600, with choices of port size and thread (PT standard, G and NPT as order options), drain type, filter grade, gauge style and scale. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR300C08MLJF3WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
On a fixture line where clamp cylinders hold parts during fastening, this unit cleans the supply air down to 5 um and holds a reduced, low-pressure setting so delicate parts are gripped without marking, with the bar-scale gauge letting operators read the set point at a glance.
Feeding the valve island of a cartoning or wrapping machine, the filter element strips water and pipe scale that would score spool surfaces, while the regulator section supplies the stable reduced pressure the island was designed around; the manual drain is emptied during scheduled changeovers.
At blow-off and cleaning stations along a conveyor line, the 5 um element keeps the jets from clogging with particulate, and the low-pressure regulator type suits circuits where a gentle, controlled reduced pressure is required rather than full line pressure.
Choose the size and port step against the air demand of the circuit: this unit is size 300 with a 1/4 in NPT port, and the GFR range steps up through 400 and 600 for larger ports and flow. This configuration already fixes several decode choices: the 5 um element (instead of the 40 um standard), the manual drain (instead of automatic or differential-pressure), the low-pressure regulator type, the square gauge on a bar scale, the fitted check valve, and no bracket. If you need a different drain, grade, gauge scale or thread (PT standard, G or NPT), those are orderable options in the same family. Flow for the GFR series is published as curves, not a single rating, so send us your application conditions 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. 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 rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Tell us your inlet pressure, set pressure and required flow, and we will confirm sizing against the datasheet curves on request before you order.
The W code in GFR300C08MLJF3WTK selects the fine 5 um filter element instead of the 40 um standard grade, which suits circuits with sensitive valves or blow-off nozzles. The M code selects the manual drain, so condensate is emptied by hand during maintenance rounds; automatic and differential-pressure drains are orderable alternatives if you prefer unattended draining.
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.